./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_running-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f2b069-0b4f-427d-8445-162579be359b/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f2b069-0b4f-427d-8445-162579be359b/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f2b069-0b4f-427d-8445-162579be359b/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f2b069-0b4f-427d-8445-162579be359b/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_running-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f2b069-0b4f-427d-8445-162579be359b/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f2b069-0b4f-427d-8445-162579be359b/bin/utaipan-TEXQjIfE4P --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b155d36c818668577415bbab4913364c1907de6bd1c1c9e0d185f4f2f125b180 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 00:34:19,440 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 00:34:19,444 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 00:34:19,500 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 00:34:19,501 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 00:34:19,505 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 00:34:19,507 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 00:34:19,510 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 00:34:19,513 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 00:34:19,518 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 00:34:19,519 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 00:34:19,521 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 00:34:19,522 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 00:34:19,524 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 00:34:19,526 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 00:34:19,535 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 00:34:19,538 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 00:34:19,539 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 00:34:19,542 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 00:34:19,552 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 00:34:19,554 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 00:34:19,556 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 00:34:19,559 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 00:34:19,560 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 00:34:19,569 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 00:34:19,570 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 00:34:19,570 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 00:34:19,576 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 00:34:19,577 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 00:34:19,578 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 00:34:19,579 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 00:34:19,580 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 00:34:19,582 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 00:34:19,583 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 00:34:19,585 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 00:34:19,585 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 00:34:19,586 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 00:34:19,586 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 00:34:19,586 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 00:34:19,587 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 00:34:19,588 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 00:34:19,589 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f2b069-0b4f-427d-8445-162579be359b/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-21 00:34:19,632 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 00:34:19,633 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 00:34:19,633 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 00:34:19,634 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 00:34:19,635 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 00:34:19,635 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 00:34:19,635 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 00:34:19,635 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 00:34:19,636 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 00:34:19,636 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 00:34:19,637 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 00:34:19,637 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 00:34:19,637 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 00:34:19,638 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 00:34:19,638 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 00:34:19,638 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 00:34:19,638 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 00:34:19,639 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 00:34:19,639 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 00:34:19,639 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 00:34:19,640 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 00:34:19,640 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 00:34:19,640 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 00:34:19,640 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 00:34:19,641 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 00:34:19,641 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 00:34:19,642 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 00:34:19,643 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 00:34:19,643 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 00:34:19,643 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 00:34:19,643 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 00:34:19,644 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 00:34:19,644 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:34:19,644 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 00:34:19,645 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 00:34:19,645 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 00:34:19,645 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 00:34:19,645 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 00:34:19,645 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 00:34:19,646 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 00:34:19,646 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 00:34:19,646 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_98f2b069-0b4f-427d-8445-162579be359b/bin/utaipan-TEXQjIfE4P/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f2b069-0b4f-427d-8445-162579be359b/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b155d36c818668577415bbab4913364c1907de6bd1c1c9e0d185f4f2f125b180 [2021-11-21 00:34:19,976 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 00:34:20,000 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 00:34:20,002 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 00:34:20,003 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 00:34:20,004 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 00:34:20,005 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f2b069-0b4f-427d-8445-162579be359b/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/array-examples/standard_running-2.i [2021-11-21 00:34:20,066 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f2b069-0b4f-427d-8445-162579be359b/bin/utaipan-TEXQjIfE4P/data/539e8c67d/73b957fa0e9b4d7cbaf9934665339528/FLAGfeb83ec54 [2021-11-21 00:34:20,566 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 00:34:20,566 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f2b069-0b4f-427d-8445-162579be359b/sv-benchmarks/c/array-examples/standard_running-2.i [2021-11-21 00:34:20,573 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f2b069-0b4f-427d-8445-162579be359b/bin/utaipan-TEXQjIfE4P/data/539e8c67d/73b957fa0e9b4d7cbaf9934665339528/FLAGfeb83ec54 [2021-11-21 00:34:20,916 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f2b069-0b4f-427d-8445-162579be359b/bin/utaipan-TEXQjIfE4P/data/539e8c67d/73b957fa0e9b4d7cbaf9934665339528 [2021-11-21 00:34:20,918 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 00:34:20,922 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 00:34:20,924 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 00:34:20,924 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 00:34:20,929 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 00:34:20,930 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:34:20" (1/1) ... [2021-11-21 00:34:20,932 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@729f016a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:34:20, skipping insertion in model container [2021-11-21 00:34:20,933 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:34:20" (1/1) ... [2021-11-21 00:34:20,940 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 00:34:20,956 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 00:34:21,126 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_98f2b069-0b4f-427d-8445-162579be359b/sv-benchmarks/c/array-examples/standard_running-2.i[811,824] [2021-11-21 00:34:21,141 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:34:21,149 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 00:34:21,164 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_98f2b069-0b4f-427d-8445-162579be359b/sv-benchmarks/c/array-examples/standard_running-2.i[811,824] [2021-11-21 00:34:21,174 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:34:21,188 INFO L208 MainTranslator]: Completed translation [2021-11-21 00:34:21,189 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:34:21 WrapperNode [2021-11-21 00:34:21,189 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 00:34:21,190 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 00:34:21,190 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 00:34:21,190 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 00:34:21,198 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:34:21" (1/1) ... [2021-11-21 00:34:21,206 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:34:21" (1/1) ... [2021-11-21 00:34:21,226 INFO L137 Inliner]: procedures = 16, calls = 21, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 84 [2021-11-21 00:34:21,226 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 00:34:21,227 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 00:34:21,227 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 00:34:21,228 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 00:34:21,235 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:34:21" (1/1) ... [2021-11-21 00:34:21,235 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:34:21" (1/1) ... [2021-11-21 00:34:21,237 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:34:21" (1/1) ... [2021-11-21 00:34:21,238 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:34:21" (1/1) ... [2021-11-21 00:34:21,247 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:34:21" (1/1) ... [2021-11-21 00:34:21,254 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:34:21" (1/1) ... [2021-11-21 00:34:21,257 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:34:21" (1/1) ... [2021-11-21 00:34:21,269 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 00:34:21,270 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 00:34:21,270 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 00:34:21,270 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 00:34:21,273 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:34:21" (1/1) ... [2021-11-21 00:34:21,282 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:34:21,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f2b069-0b4f-427d-8445-162579be359b/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:34:21,312 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f2b069-0b4f-427d-8445-162579be359b/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 00:34:21,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f2b069-0b4f-427d-8445-162579be359b/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 00:34:21,367 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 00:34:21,367 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 00:34:21,367 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-21 00:34:21,368 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-21 00:34:21,368 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 00:34:21,368 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 00:34:21,368 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-21 00:34:21,368 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-21 00:34:21,446 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 00:34:21,448 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 00:34:21,625 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 00:34:21,751 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 00:34:21,752 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-21 00:34:21,755 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:34:21 BoogieIcfgContainer [2021-11-21 00:34:21,755 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 00:34:21,758 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 00:34:21,758 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 00:34:21,762 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 00:34:21,762 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 12:34:20" (1/3) ... [2021-11-21 00:34:21,763 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8e0007f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:34:21, skipping insertion in model container [2021-11-21 00:34:21,764 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:34:21" (2/3) ... [2021-11-21 00:34:21,764 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8e0007f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:34:21, skipping insertion in model container [2021-11-21 00:34:21,765 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:34:21" (3/3) ... [2021-11-21 00:34:21,766 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_running-2.i [2021-11-21 00:34:21,772 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 00:34:21,772 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 00:34:21,831 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 00:34:21,842 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-21 00:34:21,842 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 00:34:21,859 INFO L276 IsEmpty]: Start isEmpty. Operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:34:21,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-21 00:34:21,866 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:34:21,867 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-21 00:34:21,879 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:34:21,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:34:21,893 INFO L85 PathProgramCache]: Analyzing trace with hash -740857175, now seen corresponding path program 1 times [2021-11-21 00:34:21,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:34:21,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467853908] [2021-11-21 00:34:21,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:34:21,908 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:34:22,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:34:22,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:34:22,184 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:34:22,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467853908] [2021-11-21 00:34:22,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467853908] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:34:22,186 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:34:22,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 00:34:22,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385141695] [2021-11-21 00:34:22,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:34:22,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:34:22,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:34:22,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:34:22,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:34:22,243 INFO L87 Difference]: Start difference. First operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 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) [2021-11-21 00:34:22,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:34:22,288 INFO L93 Difference]: Finished difference Result 19 states and 27 transitions. [2021-11-21 00:34:22,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:34:22,290 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 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) Word has length 6 [2021-11-21 00:34:22,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:34:22,297 INFO L225 Difference]: With dead ends: 19 [2021-11-21 00:34:22,298 INFO L226 Difference]: Without dead ends: 10 [2021-11-21 00:34:22,300 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 [2021-11-21 00:34:22,304 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:34:22,305 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:34:22,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-11-21 00:34:22,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-11-21 00:34:22,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:34:22,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2021-11-21 00:34:22,340 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 6 [2021-11-21 00:34:22,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:34:22,341 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2021-11-21 00:34:22,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 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) [2021-11-21 00:34:22,341 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2021-11-21 00:34:22,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-21 00:34:22,342 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:34:22,342 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:34:22,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 00:34:22,343 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:34:22,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:34:22,358 INFO L85 PathProgramCache]: Analyzing trace with hash 1234199840, now seen corresponding path program 1 times [2021-11-21 00:34:22,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:34:22,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852622138] [2021-11-21 00:34:22,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:34:22,361 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:34:22,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:34:22,453 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 00:34:22,453 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:34:22,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852622138] [2021-11-21 00:34:22,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852622138] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:34:22,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581814835] [2021-11-21 00:34:22,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:34:22,456 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:34:22,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f2b069-0b4f-427d-8445-162579be359b/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:34:22,461 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f2b069-0b4f-427d-8445-162579be359b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:34:22,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f2b069-0b4f-427d-8445-162579be359b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 00:34:22,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:34:22,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 00:34:22,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:34:22,589 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 00:34:22,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:34:22,638 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 00:34:22,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581814835] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:34:22,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [401009946] [2021-11-21 00:34:22,661 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-21 00:34:22,661 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:34:22,666 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:34:22,671 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:34:22,672 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:34:22,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:22,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:22,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:22,888 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-21 00:34:22,889 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 [2021-11-21 00:34:22,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:22,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:22,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 6 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 [2021-11-21 00:34:23,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:23,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 36 [2021-11-21 00:34:23,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:23,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:34:23,449 INFO L354 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2021-11-21 00:34:23,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 230 treesize of output 229 [2021-11-21 00:34:24,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-21 00:34:24,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:34:24,238 INFO L354 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2021-11-21 00:34:24,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 32 [2021-11-21 00:34:24,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:34:24,309 INFO L354 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2021-11-21 00:34:24,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 32 [2021-11-21 00:34:24,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:34:24,435 INFO L354 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2021-11-21 00:34:24,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 32 [2021-11-21 00:34:24,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:34:24,485 INFO L354 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2021-11-21 00:34:24,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 32 [2021-11-21 00:34:25,923 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:34:26,064 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:34:26,064 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:34:26,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2021-11-21 00:34:26,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591201914] [2021-11-21 00:34:26,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:34:26,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 00:34:26,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:34:26,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 00:34:26,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-11-21 00:34:26,067 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:34:26,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:34:26,139 INFO L93 Difference]: Finished difference Result 26 states and 38 transitions. [2021-11-21 00:34:26,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 00:34:26,140 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-21 00:34:26,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:34:26,141 INFO L225 Difference]: With dead ends: 26 [2021-11-21 00:34:26,141 INFO L226 Difference]: Without dead ends: 19 [2021-11-21 00:34:26,141 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-11-21 00:34:26,143 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:34:26,144 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:34:26,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-11-21 00:34:26,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-11-21 00:34:26,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:34:26,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-11-21 00:34:26,154 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 9 [2021-11-21 00:34:26,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:34:26,154 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-11-21 00:34:26,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:34:26,155 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-11-21 00:34:26,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-21 00:34:26,157 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:34:26,157 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1] [2021-11-21 00:34:26,205 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f2b069-0b4f-427d-8445-162579be359b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-21 00:34:26,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f2b069-0b4f-427d-8445-162579be359b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:34:26,384 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:34:26,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:34:26,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1226298345, now seen corresponding path program 2 times [2021-11-21 00:34:26,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:34:26,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79993667] [2021-11-21 00:34:26,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:34:26,385 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:34:26,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:34:26,562 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-21 00:34:26,563 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:34:26,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79993667] [2021-11-21 00:34:26,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79993667] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:34:26,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387017767] [2021-11-21 00:34:26,564 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 00:34:26,564 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:34:26,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f2b069-0b4f-427d-8445-162579be359b/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:34:26,568 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f2b069-0b4f-427d-8445-162579be359b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:34:26,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f2b069-0b4f-427d-8445-162579be359b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 00:34:26,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-21 00:34:26,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:34:26,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-21 00:34:26,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:34:26,718 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-21 00:34:26,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:34:26,799 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-21 00:34:26,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387017767] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:34:26,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [734226308] [2021-11-21 00:34:26,809 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-21 00:34:26,810 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:34:26,810 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:34:26,810 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:34:26,811 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:34:26,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:26,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:26,868 INFO L354 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2021-11-21 00:34:26,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 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 [2021-11-21 00:34:26,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:26,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:26,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:26,928 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-21 00:34:26,931 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 [2021-11-21 00:34:27,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:27,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 41 [2021-11-21 00:34:27,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:27,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:27,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:27,169 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-11-21 00:34:27,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 240 treesize of output 228 [2021-11-21 00:34:27,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-21 00:34:27,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:34:27,498 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-11-21 00:34:27,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 22 [2021-11-21 00:34:27,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:34:27,536 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-11-21 00:34:27,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 22 [2021-11-21 00:34:27,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:34:27,631 INFO L354 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2021-11-21 00:34:27,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 32 [2021-11-21 00:34:27,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:34:27,671 INFO L354 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2021-11-21 00:34:27,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 32 [2021-11-21 00:34:29,028 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:34:29,156 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:34:29,156 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:34:29,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2021-11-21 00:34:29,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581460949] [2021-11-21 00:34:29,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:34:29,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-21 00:34:29,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:34:29,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-21 00:34:29,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-11-21 00:34:29,158 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 12 states, 12 states have (on average 1.5) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:34:29,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:34:29,266 INFO L93 Difference]: Finished difference Result 50 states and 71 transitions. [2021-11-21 00:34:29,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-21 00:34:29,269 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-21 00:34:29,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:34:29,273 INFO L225 Difference]: With dead ends: 50 [2021-11-21 00:34:29,273 INFO L226 Difference]: Without dead ends: 37 [2021-11-21 00:34:29,274 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-11-21 00:34:29,278 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:34:29,279 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 10 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:34:29,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-11-21 00:34:29,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-11-21 00:34:29,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 36 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:34:29,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2021-11-21 00:34:29,289 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 18 [2021-11-21 00:34:29,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:34:29,289 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2021-11-21 00:34:29,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.5) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:34:29,290 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2021-11-21 00:34:29,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-21 00:34:29,292 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:34:29,292 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1] [2021-11-21 00:34:29,313 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f2b069-0b4f-427d-8445-162579be359b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-21 00:34:29,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f2b069-0b4f-427d-8445-162579be359b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:34:29,499 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:34:29,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:34:29,499 INFO L85 PathProgramCache]: Analyzing trace with hash 2077183433, now seen corresponding path program 3 times [2021-11-21 00:34:29,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:34:29,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961304045] [2021-11-21 00:34:29,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:34:29,500 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:34:29,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:34:29,831 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-11-21 00:34:29,832 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:34:29,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961304045] [2021-11-21 00:34:29,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961304045] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:34:29,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135630067] [2021-11-21 00:34:29,833 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 00:34:29,833 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:34:29,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f2b069-0b4f-427d-8445-162579be359b/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:34:29,834 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f2b069-0b4f-427d-8445-162579be359b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:34:29,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f2b069-0b4f-427d-8445-162579be359b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-21 00:34:29,953 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 00:34:29,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:34:29,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-21 00:34:29,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:34:30,032 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-11-21 00:34:30,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:34:30,328 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-11-21 00:34:30,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135630067] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:34:30,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [95643016] [2021-11-21 00:34:30,331 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-21 00:34:30,331 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:34:30,331 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:34:30,331 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:34:30,331 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:34:30,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:30,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:30,394 INFO L354 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2021-11-21 00:34:30,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 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 [2021-11-21 00:34:30,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:30,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:30,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:30,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:30,492 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-21 00:34:30,492 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 [2021-11-21 00:34:30,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:30,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 36 [2021-11-21 00:34:30,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:30,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:34:30,683 INFO L354 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2021-11-21 00:34:30,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 230 treesize of output 229 [2021-11-21 00:34:31,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-21 00:34:31,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:34:31,123 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-11-21 00:34:31,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 22 [2021-11-21 00:34:31,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:34:31,156 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-11-21 00:34:31,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 22 [2021-11-21 00:34:31,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:34:31,261 INFO L354 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2021-11-21 00:34:31,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 32 [2021-11-21 00:34:31,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:34:31,305 INFO L354 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2021-11-21 00:34:31,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 32 [2021-11-21 00:34:32,330 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:34:32,474 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:34:32,474 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:34:32,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2021-11-21 00:34:32,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452885412] [2021-11-21 00:34:32,475 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:34:32,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-21 00:34:32,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:34:32,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-21 00:34:32,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=466, Unknown=0, NotChecked=0, Total=756 [2021-11-21 00:34:32,476 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand has 24 states, 24 states have (on average 1.25) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:34:32,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:34:32,712 INFO L93 Difference]: Finished difference Result 98 states and 137 transitions. [2021-11-21 00:34:32,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-21 00:34:32,712 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.25) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-21 00:34:32,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:34:32,714 INFO L225 Difference]: With dead ends: 98 [2021-11-21 00:34:32,716 INFO L226 Difference]: Without dead ends: 73 [2021-11-21 00:34:32,716 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=290, Invalid=466, Unknown=0, NotChecked=0, Total=756 [2021-11-21 00:34:32,718 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:34:32,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 00:34:32,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-11-21 00:34:32,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2021-11-21 00:34:32,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.0416666666666667) internal successors, (75), 72 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:34:32,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2021-11-21 00:34:32,739 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 36 [2021-11-21 00:34:32,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:34:32,739 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2021-11-21 00:34:32,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.25) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:34:32,740 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2021-11-21 00:34:32,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-21 00:34:32,745 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:34:32,746 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 1, 1, 1, 1, 1, 1] [2021-11-21 00:34:32,782 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f2b069-0b4f-427d-8445-162579be359b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-21 00:34:32,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f2b069-0b4f-427d-8445-162579be359b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:34:32,962 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:34:32,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:34:32,962 INFO L85 PathProgramCache]: Analyzing trace with hash 130242953, now seen corresponding path program 4 times [2021-11-21 00:34:32,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:34:32,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981689276] [2021-11-21 00:34:32,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:34:32,963 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:34:33,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:34:33,449 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2021-11-21 00:34:33,449 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:34:33,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981689276] [2021-11-21 00:34:33,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981689276] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:34:33,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437335477] [2021-11-21 00:34:33,450 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-21 00:34:33,450 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:34:33,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f2b069-0b4f-427d-8445-162579be359b/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:34:33,455 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f2b069-0b4f-427d-8445-162579be359b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:34:33,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f2b069-0b4f-427d-8445-162579be359b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-21 00:34:33,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:34:33,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-21 00:34:33,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:34:33,746 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2021-11-21 00:34:33,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:34:34,569 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2021-11-21 00:34:34,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437335477] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:34:34,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [926467773] [2021-11-21 00:34:34,572 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-21 00:34:34,572 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:34:34,573 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:34:34,573 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:34:34,573 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:34:34,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:34,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:34,640 INFO L354 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2021-11-21 00:34:34,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 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 [2021-11-21 00:34:34,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:34,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:34,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:34,707 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-21 00:34:34,708 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 [2021-11-21 00:34:34,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:34,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 41 [2021-11-21 00:34:34,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:34,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:34,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:34,931 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-11-21 00:34:34,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 240 treesize of output 228 [2021-11-21 00:34:35,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-21 00:34:35,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:34:35,316 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-11-21 00:34:35,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 22 [2021-11-21 00:34:35,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:34:35,355 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-11-21 00:34:35,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 22 [2021-11-21 00:34:35,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:34:35,450 INFO L354 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2021-11-21 00:34:35,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 32 [2021-11-21 00:34:35,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:34:35,493 INFO L354 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2021-11-21 00:34:35,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 32 [2021-11-21 00:34:36,513 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:34:36,652 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:34:36,652 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:34:36,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 47 [2021-11-21 00:34:36,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153808033] [2021-11-21 00:34:36,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:34:36,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-21 00:34:36,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:34:36,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-21 00:34:36,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1142, Invalid=1510, Unknown=0, NotChecked=0, Total=2652 [2021-11-21 00:34:36,656 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand has 48 states, 48 states have (on average 1.125) internal successors, (54), 47 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:34:37,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:34:37,182 INFO L93 Difference]: Finished difference Result 194 states and 269 transitions. [2021-11-21 00:34:37,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-21 00:34:37,188 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.125) internal successors, (54), 47 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-21 00:34:37,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:34:37,197 INFO L225 Difference]: With dead ends: 194 [2021-11-21 00:34:37,198 INFO L226 Difference]: Without dead ends: 145 [2021-11-21 00:34:37,201 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1142, Invalid=1510, Unknown=0, NotChecked=0, Total=2652 [2021-11-21 00:34:37,202 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 395 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 395 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 00:34:37,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [395 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 00:34:37,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-11-21 00:34:37,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2021-11-21 00:34:37,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.0208333333333333) internal successors, (147), 144 states have internal predecessors, (147), 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) [2021-11-21 00:34:37,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 147 transitions. [2021-11-21 00:34:37,237 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 147 transitions. Word has length 72 [2021-11-21 00:34:37,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:34:37,238 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 147 transitions. [2021-11-21 00:34:37,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.125) internal successors, (54), 47 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:34:37,239 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 147 transitions. [2021-11-21 00:34:37,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-21 00:34:37,249 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:34:37,249 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 46, 1, 1, 1, 1, 1, 1] [2021-11-21 00:34:37,291 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f2b069-0b4f-427d-8445-162579be359b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-21 00:34:37,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f2b069-0b4f-427d-8445-162579be359b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:34:37,476 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:34:37,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:34:37,476 INFO L85 PathProgramCache]: Analyzing trace with hash -995634935, now seen corresponding path program 5 times [2021-11-21 00:34:37,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:34:37,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556859940] [2021-11-21 00:34:37,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:34:37,477 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:34:37,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:34:38,746 INFO L134 CoverageAnalysis]: Checked inductivity of 3243 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 2162 trivial. 0 not checked. [2021-11-21 00:34:38,747 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:34:38,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556859940] [2021-11-21 00:34:38,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556859940] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:34:38,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921975119] [2021-11-21 00:34:38,748 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 00:34:38,748 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:34:38,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f2b069-0b4f-427d-8445-162579be359b/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:34:38,750 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f2b069-0b4f-427d-8445-162579be359b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:34:38,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98f2b069-0b4f-427d-8445-162579be359b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process