./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-acceleration/array_2-1-simple.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b49f2efd-df3a-4994-9881-c54ff96fd214/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b49f2efd-df3a-4994-9881-c54ff96fd214/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b49f2efd-df3a-4994-9881-c54ff96fd214/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b49f2efd-df3a-4994-9881-c54ff96fd214/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-acceleration/array_2-1-simple.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b49f2efd-df3a-4994-9881-c54ff96fd214/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b49f2efd-df3a-4994-9881-c54ff96fd214/bin/utaipan-eEHZpOm5b7 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ef2ac183abfa5be888591001d2f7376a659c701d3e7fb64cad1cba56a829d8b3 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 20:33:43,013 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 20:33:43,016 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 20:33:43,075 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 20:33:43,076 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 20:33:43,080 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 20:33:43,082 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 20:33:43,086 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 20:33:43,088 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 20:33:43,096 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 20:33:43,097 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 20:33:43,099 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 20:33:43,099 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 20:33:43,102 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 20:33:43,104 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 20:33:43,111 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 20:33:43,113 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 20:33:43,114 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 20:33:43,117 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 20:33:43,123 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 20:33:43,125 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 20:33:43,127 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 20:33:43,129 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 20:33:43,130 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 20:33:43,136 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 20:33:43,136 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 20:33:43,137 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 20:33:43,138 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 20:33:43,139 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 20:33:43,140 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 20:33:43,141 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 20:33:43,142 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 20:33:43,144 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 20:33:43,145 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 20:33:43,146 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 20:33:43,146 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 20:33:43,147 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 20:33:43,147 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 20:33:43,148 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 20:33:43,148 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 20:33:43,149 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 20:33:43,150 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b49f2efd-df3a-4994-9881-c54ff96fd214/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 20:33:43,193 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 20:33:43,193 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 20:33:43,194 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 20:33:43,194 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 20:33:43,201 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 20:33:43,201 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 20:33:43,202 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 20:33:43,202 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 20:33:43,202 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 20:33:43,202 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 20:33:43,203 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 20:33:43,204 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 20:33:43,204 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 20:33:43,204 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 20:33:43,204 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 20:33:43,205 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 20:33:43,205 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 20:33:43,205 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 20:33:43,206 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 20:33:43,206 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 20:33:43,206 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 20:33:43,206 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 20:33:43,207 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 20:33:43,207 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 20:33:43,207 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 20:33:43,207 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 20:33:43,207 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 20:33:43,208 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 20:33:43,208 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 20:33:43,208 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 20:33:43,208 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 20:33:43,209 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 20:33:43,209 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:33:43,209 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 20:33:43,210 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 20:33:43,210 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 20:33:43,210 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 20:33:43,210 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 20:33:43,210 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 20:33:43,211 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 20:33:43,211 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 20:33:43,211 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_b49f2efd-df3a-4994-9881-c54ff96fd214/bin/utaipan-eEHZpOm5b7/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b49f2efd-df3a-4994-9881-c54ff96fd214/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ef2ac183abfa5be888591001d2f7376a659c701d3e7fb64cad1cba56a829d8b3 [2021-11-25 20:33:43,460 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 20:33:43,486 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 20:33:43,489 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 20:33:43,490 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 20:33:43,491 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 20:33:43,492 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b49f2efd-df3a-4994-9881-c54ff96fd214/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/loop-acceleration/array_2-1-simple.i [2021-11-25 20:33:43,569 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b49f2efd-df3a-4994-9881-c54ff96fd214/bin/utaipan-eEHZpOm5b7/data/8f5b1051e/4125e9706cd54dbdb188f516e615bd00/FLAG622978026 [2021-11-25 20:33:43,998 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 20:33:43,999 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b49f2efd-df3a-4994-9881-c54ff96fd214/sv-benchmarks/c/loop-acceleration/array_2-1-simple.i [2021-11-25 20:33:44,004 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b49f2efd-df3a-4994-9881-c54ff96fd214/bin/utaipan-eEHZpOm5b7/data/8f5b1051e/4125e9706cd54dbdb188f516e615bd00/FLAG622978026 [2021-11-25 20:33:44,376 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b49f2efd-df3a-4994-9881-c54ff96fd214/bin/utaipan-eEHZpOm5b7/data/8f5b1051e/4125e9706cd54dbdb188f516e615bd00 [2021-11-25 20:33:44,379 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 20:33:44,380 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 20:33:44,398 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 20:33:44,398 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 20:33:44,402 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 20:33:44,402 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:33:44" (1/1) ... [2021-11-25 20:33:44,403 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1864be3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:33:44, skipping insertion in model container [2021-11-25 20:33:44,404 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:33:44" (1/1) ... [2021-11-25 20:33:44,409 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 20:33:44,432 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 20:33:44,610 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_b49f2efd-df3a-4994-9881-c54ff96fd214/sv-benchmarks/c/loop-acceleration/array_2-1-simple.i[809,822] [2021-11-25 20:33:44,632 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:33:44,641 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 20:33:44,661 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_b49f2efd-df3a-4994-9881-c54ff96fd214/sv-benchmarks/c/loop-acceleration/array_2-1-simple.i[809,822] [2021-11-25 20:33:44,670 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:33:44,689 INFO L208 MainTranslator]: Completed translation [2021-11-25 20:33:44,689 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:33:44 WrapperNode [2021-11-25 20:33:44,690 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 20:33:44,691 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 20:33:44,691 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 20:33:44,692 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 20:33:44,700 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:33:44" (1/1) ... [2021-11-25 20:33:44,710 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:33:44" (1/1) ... [2021-11-25 20:33:44,736 INFO L137 Inliner]: procedures = 16, calls = 17, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 44 [2021-11-25 20:33:44,737 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 20:33:44,738 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 20:33:44,738 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 20:33:44,738 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 20:33:44,746 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:33:44" (1/1) ... [2021-11-25 20:33:44,747 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:33:44" (1/1) ... [2021-11-25 20:33:44,759 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:33:44" (1/1) ... [2021-11-25 20:33:44,759 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:33:44" (1/1) ... [2021-11-25 20:33:44,771 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:33:44" (1/1) ... [2021-11-25 20:33:44,774 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:33:44" (1/1) ... [2021-11-25 20:33:44,775 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:33:44" (1/1) ... [2021-11-25 20:33:44,776 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 20:33:44,777 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 20:33:44,777 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 20:33:44,778 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 20:33:44,785 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:33:44" (1/1) ... [2021-11-25 20:33:44,792 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:33:44,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b49f2efd-df3a-4994-9881-c54ff96fd214/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:33:44,814 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b49f2efd-df3a-4994-9881-c54ff96fd214/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 20:33:44,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b49f2efd-df3a-4994-9881-c54ff96fd214/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 20:33:44,860 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 20:33:44,860 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 20:33:44,860 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-25 20:33:44,861 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 20:33:44,861 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-25 20:33:44,861 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 20:33:44,861 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 20:33:44,861 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-25 20:33:44,862 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 20:33:44,933 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 20:33:44,935 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 20:33:45,036 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 20:33:45,056 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 20:33:45,056 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-25 20:33:45,059 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:33:45 BoogieIcfgContainer [2021-11-25 20:33:45,059 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 20:33:45,061 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 20:33:45,061 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 20:33:45,064 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 20:33:45,064 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 08:33:44" (1/3) ... [2021-11-25 20:33:45,065 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a36c674 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:33:45, skipping insertion in model container [2021-11-25 20:33:45,065 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:33:44" (2/3) ... [2021-11-25 20:33:45,066 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a36c674 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:33:45, skipping insertion in model container [2021-11-25 20:33:45,066 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:33:45" (3/3) ... [2021-11-25 20:33:45,067 INFO L111 eAbstractionObserver]: Analyzing ICFG array_2-1-simple.i [2021-11-25 20:33:45,071 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 20:33:45,071 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 20:33:45,116 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 20:33:45,123 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 20:33:45,124 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 20:33:45,137 INFO L276 IsEmpty]: Start isEmpty. Operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:33:45,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-25 20:33:45,142 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:33:45,153 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-25 20:33:45,156 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:33:45,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:33:45,167 INFO L85 PathProgramCache]: Analyzing trace with hash 1941830, now seen corresponding path program 1 times [2021-11-25 20:33:45,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:33:45,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558074836] [2021-11-25 20:33:45,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:33:45,178 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:33:45,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:33:45,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:33:45,422 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:33:45,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558074836] [2021-11-25 20:33:45,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558074836] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:33:45,423 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:33:45,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 20:33:45,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113203798] [2021-11-25 20:33:45,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:33:45,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:33:45,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:33:45,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:33:45,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:33:45,482 INFO L87 Difference]: Start difference. First operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 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 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:33:45,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:33:45,507 INFO L93 Difference]: Finished difference Result 13 states and 15 transitions. [2021-11-25 20:33:45,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:33:45,510 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 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 4 [2021-11-25 20:33:45,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:33:45,516 INFO L225 Difference]: With dead ends: 13 [2021-11-25 20:33:45,517 INFO L226 Difference]: Without dead ends: 6 [2021-11-25 20:33:45,519 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 [2021-11-25 20:33:45,523 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:33:45,524 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 20:33:45,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2021-11-25 20:33:45,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2021-11-25 20:33:45,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:33:45,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2021-11-25 20:33:45,565 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2021-11-25 20:33:45,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:33:45,568 INFO L470 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2021-11-25 20:33:45,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:33:45,568 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2021-11-25 20:33:45,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-25 20:33:45,569 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:33:45,569 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-25 20:33:45,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 20:33:45,570 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:33:45,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:33:45,574 INFO L85 PathProgramCache]: Analyzing trace with hash 60064071, now seen corresponding path program 1 times [2021-11-25 20:33:45,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:33:45,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573757322] [2021-11-25 20:33:45,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:33:45,575 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:33:45,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:33:45,667 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:33:45,667 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:33:45,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573757322] [2021-11-25 20:33:45,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573757322] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:33:45,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291166509] [2021-11-25 20:33:45,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:33:45,669 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:33:45,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b49f2efd-df3a-4994-9881-c54ff96fd214/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:33:45,678 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b49f2efd-df3a-4994-9881-c54ff96fd214/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:33:45,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b49f2efd-df3a-4994-9881-c54ff96fd214/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 20:33:45,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:33:45,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 20:33:45,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:33:45,865 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:33:45,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:33:45,938 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:33:45,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291166509] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:33:45,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [222213050] [2021-11-25 20:33:45,974 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-11-25 20:33:45,975 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:33:45,979 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:33:45,984 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:33:45,985 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:33:46,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:33:46,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:33:46,102 INFO L354 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2021-11-25 20:33:46,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2021-11-25 20:33:46,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:33:46,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:33:46,165 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-25 20:33:46,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2021-11-25 20:33:46,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:33:46,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:33:46,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:33:46,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 34 [2021-11-25 20:33:46,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:33:46,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:33:46,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 48 [2021-11-25 20:33:46,444 INFO L354 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2021-11-25 20:33:46,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 281 treesize of output 270 [2021-11-25 20:33:46,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:33:46,724 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-25 20:33:46,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-11-25 20:33:46,762 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:33:46,881 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '69#(and (= (ite (not (= |ULTIMATE.start_main_#t~mem4#1| |ULTIMATE.start_main_#t~mem3#1|)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 2048 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| 4096))) (= (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ |ULTIMATE.start_main_~#B~0#1.offset| 4096)) |ULTIMATE.start_main_#t~mem4#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 20:33:46,881 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:33:46,882 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:33:46,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2021-11-25 20:33:46,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653800603] [2021-11-25 20:33:46,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:33:46,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 20:33:46,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:33:46,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 20:33:46,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-25 20:33:46,887 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:33:46,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:33:46,906 INFO L93 Difference]: Finished difference Result 12 states and 14 transitions. [2021-11-25 20:33:46,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 20:33:46,906 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-11-25 20:33:46,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:33:46,907 INFO L225 Difference]: With dead ends: 12 [2021-11-25 20:33:46,908 INFO L226 Difference]: Without dead ends: 9 [2021-11-25 20:33:46,908 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-25 20:33:46,914 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:33:46,915 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 20:33:46,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-11-25 20:33:46,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-11-25 20:33:46,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:33:46,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2021-11-25 20:33:46,920 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 5 [2021-11-25 20:33:46,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:33:46,921 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2021-11-25 20:33:46,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:33:46,921 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2021-11-25 20:33:46,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-25 20:33:46,922 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:33:46,923 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1] [2021-11-25 20:33:46,959 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b49f2efd-df3a-4994-9881-c54ff96fd214/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 20:33:47,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b49f2efd-df3a-4994-9881-c54ff96fd214/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:33:47,150 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:33:47,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:33:47,151 INFO L85 PathProgramCache]: Analyzing trace with hash -1764353658, now seen corresponding path program 2 times [2021-11-25 20:33:47,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:33:47,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126821078] [2021-11-25 20:33:47,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:33:47,152 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:33:47,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:33:47,264 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:33:47,265 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:33:47,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126821078] [2021-11-25 20:33:47,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126821078] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:33:47,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330013107] [2021-11-25 20:33:47,266 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 20:33:47,266 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:33:47,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b49f2efd-df3a-4994-9881-c54ff96fd214/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:33:47,274 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b49f2efd-df3a-4994-9881-c54ff96fd214/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:33:47,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b49f2efd-df3a-4994-9881-c54ff96fd214/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 20:33:47,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-25 20:33:47,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:33:47,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 20:33:47,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:33:47,374 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:33:47,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:33:47,465 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:33:47,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330013107] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:33:47,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1842248210] [2021-11-25 20:33:47,471 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-11-25 20:33:47,471 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:33:47,471 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:33:47,471 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:33:47,472 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:33:47,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:33:47,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:33:47,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:33:47,509 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-11-25 20:33:47,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-11-25 20:33:47,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:33:47,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:33:47,550 INFO L354 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2021-11-25 20:33:47,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2021-11-25 20:33:47,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:33:47,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:33:47,601 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-25 20:33:47,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2021-11-25 20:33:47,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:33:47,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:33:47,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 48 [2021-11-25 20:33:47,782 INFO L354 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2021-11-25 20:33:47,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 281 treesize of output 270 [2021-11-25 20:33:47,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:33:47,928 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-25 20:33:47,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-11-25 20:33:47,944 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:33:48,027 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '158#(and (= (ite (not (= |ULTIMATE.start_main_#t~mem4#1| |ULTIMATE.start_main_#t~mem3#1|)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 2048 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| 4096))) (= (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ |ULTIMATE.start_main_~#B~0#1.offset| 4096)) |ULTIMATE.start_main_#t~mem4#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 20:33:48,027 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:33:48,028 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:33:48,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2021-11-25 20:33:48,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148946672] [2021-11-25 20:33:48,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:33:48,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-25 20:33:48,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:33:48,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-25 20:33:48,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2021-11-25 20:33:48,031 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand has 13 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:33:48,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:33:48,063 INFO L93 Difference]: Finished difference Result 18 states and 23 transitions. [2021-11-25 20:33:48,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-25 20:33:48,064 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-25 20:33:48,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:33:48,065 INFO L225 Difference]: With dead ends: 18 [2021-11-25 20:33:48,066 INFO L226 Difference]: Without dead ends: 15 [2021-11-25 20:33:48,070 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2021-11-25 20:33:48,076 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:33:48,077 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 20:33:48,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-11-25 20:33:48,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-11-25 20:33:48,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:33:48,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2021-11-25 20:33:48,085 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 8 [2021-11-25 20:33:48,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:33:48,089 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2021-11-25 20:33:48,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:33:48,090 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2021-11-25 20:33:48,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-25 20:33:48,090 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:33:48,090 INFO L514 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1] [2021-11-25 20:33:48,127 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b49f2efd-df3a-4994-9881-c54ff96fd214/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 20:33:48,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b49f2efd-df3a-4994-9881-c54ff96fd214/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:33:48,291 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:33:48,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:33:48,292 INFO L85 PathProgramCache]: Analyzing trace with hash 193090022, now seen corresponding path program 3 times [2021-11-25 20:33:48,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:33:48,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825173457] [2021-11-25 20:33:48,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:33:48,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:33:48,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:33:48,440 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:33:48,441 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:33:48,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825173457] [2021-11-25 20:33:48,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825173457] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:33:48,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799742674] [2021-11-25 20:33:48,441 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 20:33:48,441 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:33:48,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b49f2efd-df3a-4994-9881-c54ff96fd214/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:33:48,442 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b49f2efd-df3a-4994-9881-c54ff96fd214/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:33:48,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b49f2efd-df3a-4994-9881-c54ff96fd214/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 20:33:48,511 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 20:33:48,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:33:48,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-25 20:33:48,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:33:48,550 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:33:48,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:33:48,766 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:33:48,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799742674] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:33:48,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [298782417] [2021-11-25 20:33:48,768 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-11-25 20:33:48,769 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:33:48,769 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:33:48,769 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:33:48,769 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:33:48,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:33:48,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:33:48,817 INFO L354 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2021-11-25 20:33:48,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2021-11-25 20:33:48,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:33:48,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:33:48,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:33:48,846 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-11-25 20:33:48,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-11-25 20:33:48,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:33:48,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:33:48,904 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-25 20:33:48,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2021-11-25 20:33:48,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:33:48,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:33:48,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 48 [2021-11-25 20:33:49,030 INFO L354 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2021-11-25 20:33:49,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 285 treesize of output 272 [2021-11-25 20:33:49,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:33:49,146 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-25 20:33:49,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-11-25 20:33:49,160 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:33:49,261 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '319#(and (= (ite (not (= |ULTIMATE.start_main_#t~mem4#1| |ULTIMATE.start_main_#t~mem3#1|)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 2048 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| 4096))) (= (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ |ULTIMATE.start_main_~#B~0#1.offset| 4096)) |ULTIMATE.start_main_#t~mem4#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 20:33:49,261 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:33:49,261 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:33:49,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2021-11-25 20:33:49,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987737785] [2021-11-25 20:33:49,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:33:49,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-25 20:33:49,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:33:49,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-25 20:33:49,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=309, Invalid=447, Unknown=0, NotChecked=0, Total=756 [2021-11-25 20:33:49,263 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 25 states, 25 states have (on average 1.12) internal successors, (28), 24 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:33:49,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:33:49,306 INFO L93 Difference]: Finished difference Result 30 states and 41 transitions. [2021-11-25 20:33:49,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-25 20:33:49,307 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.12) internal successors, (28), 24 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-25 20:33:49,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:33:49,308 INFO L225 Difference]: With dead ends: 30 [2021-11-25 20:33:49,308 INFO L226 Difference]: Without dead ends: 27 [2021-11-25 20:33:49,308 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=309, Invalid=447, Unknown=0, NotChecked=0, Total=756 [2021-11-25 20:33:49,309 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:33:49,310 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 4 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 20:33:49,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-25 20:33:49,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-11-25 20:33:49,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 26 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:33:49,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2021-11-25 20:33:49,315 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 14 [2021-11-25 20:33:49,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:33:49,315 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2021-11-25 20:33:49,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.12) internal successors, (28), 24 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:33:49,316 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2021-11-25 20:33:49,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-25 20:33:49,317 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:33:49,317 INFO L514 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1] [2021-11-25 20:33:49,353 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b49f2efd-df3a-4994-9881-c54ff96fd214/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 20:33:49,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b49f2efd-df3a-4994-9881-c54ff96fd214/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:33:49,518 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:33:49,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:33:49,518 INFO L85 PathProgramCache]: Analyzing trace with hash 1874160294, now seen corresponding path program 4 times [2021-11-25 20:33:49,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:33:49,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913502570] [2021-11-25 20:33:49,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:33:49,518 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:33:49,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:33:49,978 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:33:49,978 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:33:49,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913502570] [2021-11-25 20:33:49,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913502570] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:33:49,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052741511] [2021-11-25 20:33:49,979 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 20:33:49,979 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:33:49,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b49f2efd-df3a-4994-9881-c54ff96fd214/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:33:49,994 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b49f2efd-df3a-4994-9881-c54ff96fd214/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:33:49,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b49f2efd-df3a-4994-9881-c54ff96fd214/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 20:33:50,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:33:50,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-25 20:33:50,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:33:50,178 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:33:50,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:33:50,960 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:33:50,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052741511] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:33:50,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [378279050] [2021-11-25 20:33:50,963 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-11-25 20:33:50,963 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:33:50,963 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:33:50,963 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:33:50,963 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:33:50,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:33:50,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:33:51,007 INFO L354 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2021-11-25 20:33:51,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2021-11-25 20:33:51,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:33:51,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:33:51,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:33:51,027 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-11-25 20:33:51,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-11-25 20:33:51,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:33:51,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:33:51,083 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-25 20:33:51,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2021-11-25 20:33:51,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:33:51,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:33:51,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 48 [2021-11-25 20:33:51,194 INFO L354 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2021-11-25 20:33:51,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 285 treesize of output 272 [2021-11-25 20:33:51,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:33:51,297 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-25 20:33:51,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-11-25 20:33:51,311 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:33:51,426 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '624#(and (= (ite (not (= |ULTIMATE.start_main_#t~mem4#1| |ULTIMATE.start_main_#t~mem3#1|)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 2048 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| 4096))) (= (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ |ULTIMATE.start_main_~#B~0#1.offset| 4096)) |ULTIMATE.start_main_#t~mem4#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 20:33:51,426 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:33:51,426 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:33:51,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2021-11-25 20:33:51,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457321333] [2021-11-25 20:33:51,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:33:51,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-25 20:33:51,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:33:51,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-25 20:33:51,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1185, Invalid=1467, Unknown=0, NotChecked=0, Total=2652 [2021-11-25 20:33:51,430 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand has 49 states, 49 states have (on average 1.0612244897959184) internal successors, (52), 48 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:33:51,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:33:51,513 INFO L93 Difference]: Finished difference Result 54 states and 77 transitions. [2021-11-25 20:33:51,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-25 20:33:51,514 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.0612244897959184) internal successors, (52), 48 states have internal predecessors, (52), 0 states have call successors, (0), 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 26 [2021-11-25 20:33:51,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:33:51,515 INFO L225 Difference]: With dead ends: 54 [2021-11-25 20:33:51,515 INFO L226 Difference]: Without dead ends: 51 [2021-11-25 20:33:51,517 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1185, Invalid=1467, Unknown=0, NotChecked=0, Total=2652 [2021-11-25 20:33:51,517 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:33:51,518 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 10 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:33:51,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-11-25 20:33:51,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-11-25 20:33:51,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.02) internal successors, (51), 50 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:33:51,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2021-11-25 20:33:51,525 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 26 [2021-11-25 20:33:51,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:33:51,526 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2021-11-25 20:33:51,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.0612244897959184) internal successors, (52), 48 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:33:51,526 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2021-11-25 20:33:51,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-25 20:33:51,528 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:33:51,528 INFO L514 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1] [2021-11-25 20:33:51,548 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b49f2efd-df3a-4994-9881-c54ff96fd214/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 20:33:51,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b49f2efd-df3a-4994-9881-c54ff96fd214/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:33:51,734 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:33:51,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:33:51,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1326564314, now seen corresponding path program 5 times [2021-11-25 20:33:51,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:33:51,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621407698] [2021-11-25 20:33:51,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:33:51,735 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:33:51,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:33:52,819 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:33:52,820 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:33:52,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621407698] [2021-11-25 20:33:52,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621407698] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:33:52,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964982462] [2021-11-25 20:33:52,820 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 20:33:52,820 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:33:52,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b49f2efd-df3a-4994-9881-c54ff96fd214/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:33:52,821 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b49f2efd-df3a-4994-9881-c54ff96fd214/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:33:52,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b49f2efd-df3a-4994-9881-c54ff96fd214/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 20:33:56,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2021-11-25 20:33:56,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:33:56,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-25 20:33:56,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:33:56,593 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:33:56,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:33:59,491 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:33:59,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964982462] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:33:59,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1120401482] [2021-11-25 20:33:59,493 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-11-25 20:33:59,493 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:33:59,494 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:33:59,494 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:33:59,494 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:33:59,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:33:59,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:33:59,536 INFO L354 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2021-11-25 20:33:59,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2021-11-25 20:33:59,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:33:59,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:33:59,579 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-25 20:33:59,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2021-11-25 20:33:59,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:33:59,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:33:59,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:33:59,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 34 [2021-11-25 20:33:59,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:33:59,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:33:59,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 48 [2021-11-25 20:33:59,705 INFO L354 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2021-11-25 20:33:59,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 281 treesize of output 270 [2021-11-25 20:33:59,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:33:59,806 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-25 20:33:59,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-11-25 20:33:59,819 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:33:59,992 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1217#(and (= (ite (not (= |ULTIMATE.start_main_#t~mem4#1| |ULTIMATE.start_main_#t~mem3#1|)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 2048 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| 4096))) (= (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ |ULTIMATE.start_main_~#B~0#1.offset| 4096)) |ULTIMATE.start_main_#t~mem4#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 20:33:59,992 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:33:59,992 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:33:59,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 96 [2021-11-25 20:33:59,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956849445] [2021-11-25 20:33:59,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:33:59,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2021-11-25 20:33:59,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:33:59,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2021-11-25 20:34:00,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4665, Invalid=5235, Unknown=0, NotChecked=0, Total=9900 [2021-11-25 20:34:00,000 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand has 97 states, 97 states have (on average 1.0309278350515463) internal successors, (100), 96 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:34:00,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:34:00,174 INFO L93 Difference]: Finished difference Result 102 states and 149 transitions. [2021-11-25 20:34:00,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-11-25 20:34:00,174 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 1.0309278350515463) internal successors, (100), 96 states have internal predecessors, (100), 0 states have call successors, (0), 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 50 [2021-11-25 20:34:00,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:34:00,176 INFO L225 Difference]: With dead ends: 102 [2021-11-25 20:34:00,176 INFO L226 Difference]: Without dead ends: 99 [2021-11-25 20:34:00,181 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 607 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=4665, Invalid=5235, Unknown=0, NotChecked=0, Total=9900 [2021-11-25 20:34:00,181 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:34:00,182 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:34:00,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-11-25 20:34:00,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2021-11-25 20:34:00,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.010204081632653) internal successors, (99), 98 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:34:00,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2021-11-25 20:34:00,194 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 50 [2021-11-25 20:34:00,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:34:00,194 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2021-11-25 20:34:00,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 1.0309278350515463) internal successors, (100), 96 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:34:00,195 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2021-11-25 20:34:00,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-25 20:34:00,198 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:34:00,198 INFO L514 BasicCegarLoop]: trace histogram [94, 1, 1, 1, 1] [2021-11-25 20:34:00,241 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b49f2efd-df3a-4994-9881-c54ff96fd214/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-25 20:34:00,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b49f2efd-df3a-4994-9881-c54ff96fd214/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:34:00,414 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:34:00,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:34:00,414 INFO L85 PathProgramCache]: Analyzing trace with hash 1575640870, now seen corresponding path program 6 times [2021-11-25 20:34:00,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:34:00,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134682787] [2021-11-25 20:34:00,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:34:00,415 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:34:00,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:34:04,018 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:34:04,018 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:34:04,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134682787] [2021-11-25 20:34:04,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134682787] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:34:04,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616492625] [2021-11-25 20:34:04,019 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 20:34:04,019 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:34:04,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b49f2efd-df3a-4994-9881-c54ff96fd214/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:34:04,020 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b49f2efd-df3a-4994-9881-c54ff96fd214/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:34:04,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b49f2efd-df3a-4994-9881-c54ff96fd214/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-25 20:34:04,229 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 20:34:04,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:34:04,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 912 conjuncts, 96 conjunts are in the unsatisfiable core [2021-11-25 20:34:04,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:34:04,536 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:34:04,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:34:13,336 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:34:13,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616492625] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:34:13,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1273833086] [2021-11-25 20:34:13,338 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-11-25 20:34:13,338 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:34:13,339 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:34:13,339 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:34:13,339 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:34:13,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:34:13,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:34:13,433 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-25 20:34:13,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2021-11-25 20:34:13,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:34:13,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:34:13,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2021-11-25 20:34:13,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:34:13,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:34:13,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:34:13,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 34 [2021-11-25 20:34:13,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:34:13,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:34:13,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 58 [2021-11-25 20:34:13,560 INFO L354 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2021-11-25 20:34:13,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 298 treesize of output 285 [2021-11-25 20:34:13,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:34:13,670 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-25 20:34:13,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-11-25 20:34:13,682 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:34:13,893 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2386#(and (= (ite (not (= |ULTIMATE.start_main_#t~mem4#1| |ULTIMATE.start_main_#t~mem3#1|)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 2048 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| 4096))) (= (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ |ULTIMATE.start_main_~#B~0#1.offset| 4096)) |ULTIMATE.start_main_#t~mem4#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 20:34:13,894 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:34:13,897 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:34:13,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96, 96] total 192 [2021-11-25 20:34:13,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025469467] [2021-11-25 20:34:13,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:34:13,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2021-11-25 20:34:13,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:34:13,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2021-11-25 20:34:13,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18537, Invalid=19683, Unknown=0, NotChecked=0, Total=38220 [2021-11-25 20:34:13,923 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand has 193 states, 193 states have (on average 1.0155440414507773) internal successors, (196), 192 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:34:14,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:34:14,438 INFO L93 Difference]: Finished difference Result 198 states and 293 transitions. [2021-11-25 20:34:14,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2021-11-25 20:34:14,438 INFO L78 Accepts]: Start accepts. Automaton has has 193 states, 193 states have (on average 1.0155440414507773) internal successors, (196), 192 states have internal predecessors, (196), 0 states have call successors, (0), 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 98 [2021-11-25 20:34:14,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:34:14,447 INFO L225 Difference]: With dead ends: 198 [2021-11-25 20:34:14,448 INFO L226 Difference]: Without dead ends: 195 [2021-11-25 20:34:14,452 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 388 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1231 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=18537, Invalid=19683, Unknown=0, NotChecked=0, Total=38220 [2021-11-25 20:34:14,453 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:34:14,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 20:34:14,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-11-25 20:34:14,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2021-11-25 20:34:14,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 1.0051546391752577) internal successors, (195), 194 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:34:14,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 195 transitions. [2021-11-25 20:34:14,494 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 195 transitions. Word has length 98 [2021-11-25 20:34:14,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:34:14,496 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 195 transitions. [2021-11-25 20:34:14,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 193 states, 193 states have (on average 1.0155440414507773) internal successors, (196), 192 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:34:14,497 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 195 transitions. [2021-11-25 20:34:14,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-11-25 20:34:14,500 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:34:14,500 INFO L514 BasicCegarLoop]: trace histogram [190, 1, 1, 1, 1] [2021-11-25 20:34:14,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b49f2efd-df3a-4994-9881-c54ff96fd214/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-25 20:34:14,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b49f2efd-df3a-4994-9881-c54ff96fd214/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:34:14,723 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:34:14,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:34:14,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1544332582, now seen corresponding path program 7 times [2021-11-25 20:34:14,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:34:14,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084192522] [2021-11-25 20:34:14,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:34:14,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:34:15,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:34:27,014 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:34:27,014 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:34:27,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084192522] [2021-11-25 20:34:27,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084192522] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:34:27,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327315644] [2021-11-25 20:34:27,015 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 20:34:27,015 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:34:27,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b49f2efd-df3a-4994-9881-c54ff96fd214/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:34:27,016 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b49f2efd-df3a-4994-9881-c54ff96fd214/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:34:27,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b49f2efd-df3a-4994-9881-c54ff96fd214/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-25 20:34:27,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:34:27,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 1776 conjuncts, 192 conjunts are in the unsatisfiable core [2021-11-25 20:34:27,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:34:28,037 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:34:28,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:35:02,923 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:35:02,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327315644] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:35:02,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [936738433] [2021-11-25 20:35:02,926 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-11-25 20:35:02,926 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:35:02,926 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:35:02,926 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:35:02,927 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:35:02,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:02,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:02,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:35:02,948 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-11-25 20:35:02,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-11-25 20:35:02,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:02,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:02,989 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-25 20:35:02,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2021-11-25 20:35:02,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:02,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:02,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2021-11-25 20:35:03,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:03,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:35:03,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 48 [2021-11-25 20:35:03,163 INFO L354 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2021-11-25 20:35:03,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 285 treesize of output 272 [2021-11-25 20:35:03,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:35:03,267 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-25 20:35:03,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-11-25 20:35:03,278 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:35:03,631 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4707#(and (= (ite (not (= |ULTIMATE.start_main_#t~mem4#1| |ULTIMATE.start_main_#t~mem3#1|)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 2048 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| 4096))) (= (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ |ULTIMATE.start_main_~#B~0#1.offset| 4096)) |ULTIMATE.start_main_#t~mem4#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 20:35:03,631 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:35:03,631 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:35:03,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [192, 192, 192] total 384 [2021-11-25 20:35:03,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603031870] [2021-11-25 20:35:03,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:35:03,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 385 states [2021-11-25 20:35:03,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:35:03,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 385 interpolants. [2021-11-25 20:35:03,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73929, Invalid=76227, Unknown=0, NotChecked=0, Total=150156 [2021-11-25 20:35:03,664 INFO L87 Difference]: Start difference. First operand 195 states and 195 transitions. Second operand has 385 states, 385 states have (on average 1.0077922077922077) internal successors, (388), 384 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:35:05,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:35:05,474 INFO L93 Difference]: Finished difference Result 390 states and 581 transitions. [2021-11-25 20:35:05,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 384 states. [2021-11-25 20:35:05,478 INFO L78 Accepts]: Start accepts. Automaton has has 385 states, 385 states have (on average 1.0077922077922077) internal successors, (388), 384 states have internal predecessors, (388), 0 states have call successors, (0), 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 194 [2021-11-25 20:35:05,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:35:05,481 INFO L225 Difference]: With dead ends: 390 [2021-11-25 20:35:05,481 INFO L226 Difference]: Without dead ends: 387 [2021-11-25 20:35:05,488 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 772 GetRequests, 386 SyntacticMatches, 0 SemanticMatches, 386 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2479 ImplicationChecksByTransitivity, 46.1s TimeCoverageRelationStatistics Valid=73929, Invalid=76227, Unknown=0, NotChecked=0, Total=150156 [2021-11-25 20:35:05,488 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 20:35:05,489 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 393 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 20:35:05,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-11-25 20:35:05,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 387. [2021-11-25 20:35:05,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 386 states have (on average 1.0025906735751295) internal successors, (387), 386 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:35:05,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 387 transitions. [2021-11-25 20:35:05,512 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 387 transitions. Word has length 194 [2021-11-25 20:35:05,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:35:05,513 INFO L470 AbstractCegarLoop]: Abstraction has 387 states and 387 transitions. [2021-11-25 20:35:05,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 385 states, 385 states have (on average 1.0077922077922077) internal successors, (388), 384 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:35:05,514 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 387 transitions. [2021-11-25 20:35:05,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2021-11-25 20:35:05,521 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:35:05,521 INFO L514 BasicCegarLoop]: trace histogram [382, 1, 1, 1, 1] [2021-11-25 20:35:05,548 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b49f2efd-df3a-4994-9881-c54ff96fd214/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-25 20:35:05,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b49f2efd-df3a-4994-9881-c54ff96fd214/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-25 20:35:05,738 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:35:05,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:35:05,738 INFO L85 PathProgramCache]: Analyzing trace with hash -1191628506, now seen corresponding path program 8 times [2021-11-25 20:35:05,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:35:05,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226525549] [2021-11-25 20:35:05,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:35:05,739 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:35:06,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:35:53,199 INFO L134 CoverageAnalysis]: Checked inductivity of 73153 backedges. 0 proven. 73153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:35:53,199 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:35:53,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226525549] [2021-11-25 20:35:53,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226525549] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:35:53,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893024281] [2021-11-25 20:35:53,200 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 20:35:53,200 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:35:53,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b49f2efd-df3a-4994-9881-c54ff96fd214/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:35:53,217 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b49f2efd-df3a-4994-9881-c54ff96fd214/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:35:53,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b49f2efd-df3a-4994-9881-c54ff96fd214/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process