./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-patterns/array29_pattern.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/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_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-patterns/array29_pattern.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/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_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/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 c79b0cfbfa84c2390344382edf3f60a855c5e1f87aaed3ee77c2dd6c5f017188 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 01:34:30,246 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 01:34:30,249 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 01:34:30,279 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 01:34:30,280 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 01:34:30,281 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 01:34:30,283 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 01:34:30,285 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 01:34:30,288 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 01:34:30,289 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 01:34:30,290 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 01:34:30,291 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 01:34:30,292 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 01:34:30,293 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 01:34:30,295 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 01:34:30,297 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 01:34:30,298 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 01:34:30,299 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 01:34:30,302 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 01:34:30,304 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 01:34:30,307 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 01:34:30,308 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 01:34:30,310 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 01:34:30,311 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 01:34:30,315 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 01:34:30,323 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 01:34:30,323 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 01:34:30,324 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 01:34:30,325 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 01:34:30,326 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 01:34:30,326 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 01:34:30,327 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 01:34:30,328 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 01:34:30,329 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 01:34:30,330 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 01:34:30,331 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 01:34:30,331 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 01:34:30,332 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 01:34:30,332 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 01:34:30,333 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 01:34:30,334 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 01:34:30,338 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-21 01:34:30,389 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 01:34:30,389 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 01:34:30,390 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 01:34:30,390 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 01:34:30,391 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 01:34:30,397 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 01:34:30,397 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 01:34:30,398 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 01:34:30,398 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 01:34:30,398 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 01:34:30,398 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 01:34:30,398 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 01:34:30,399 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 01:34:30,399 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 01:34:30,399 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 01:34:30,399 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 01:34:30,399 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 01:34:30,400 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 01:34:30,400 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 01:34:30,401 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 01:34:30,401 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 01:34:30,401 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 01:34:30,401 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 01:34:30,401 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 01:34:30,401 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 01:34:30,402 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 01:34:30,402 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 01:34:30,402 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 01:34:30,402 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 01:34:30,402 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 01:34:30,403 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 01:34:30,403 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 01:34:30,403 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:34:30,403 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 01:34:30,403 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 01:34:30,404 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 01:34:30,404 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 01:34:30,404 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 01:34:30,404 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 01:34:30,404 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 01:34:30,404 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 01:34:30,405 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_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c79b0cfbfa84c2390344382edf3f60a855c5e1f87aaed3ee77c2dd6c5f017188 [2021-11-21 01:34:30,647 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 01:34:30,668 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 01:34:30,671 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 01:34:30,672 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 01:34:30,673 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 01:34:30,674 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/array-patterns/array29_pattern.c [2021-11-21 01:34:30,758 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/data/54dfb91dd/d8625655be3440a3a3e7671974dbb05b/FLAG25c20f2ac [2021-11-21 01:34:31,365 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 01:34:31,366 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/sv-benchmarks/c/array-patterns/array29_pattern.c [2021-11-21 01:34:31,379 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/data/54dfb91dd/d8625655be3440a3a3e7671974dbb05b/FLAG25c20f2ac [2021-11-21 01:34:31,735 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/data/54dfb91dd/d8625655be3440a3a3e7671974dbb05b [2021-11-21 01:34:31,738 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 01:34:31,740 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 01:34:31,741 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 01:34:31,741 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 01:34:31,757 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 01:34:31,758 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:34:31" (1/1) ... [2021-11-21 01:34:31,759 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@405c3f51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:34:31, skipping insertion in model container [2021-11-21 01:34:31,759 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:34:31" (1/1) ... [2021-11-21 01:34:31,767 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 01:34:31,782 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 01:34:31,954 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_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/sv-benchmarks/c/array-patterns/array29_pattern.c[1255,1268] [2021-11-21 01:34:31,989 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:34:31,998 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 01:34:32,014 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/sv-benchmarks/c/array-patterns/array29_pattern.c[1255,1268] [2021-11-21 01:34:32,040 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:34:32,051 INFO L208 MainTranslator]: Completed translation [2021-11-21 01:34:32,052 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:34:32 WrapperNode [2021-11-21 01:34:32,052 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 01:34:32,053 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 01:34:32,054 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 01:34:32,054 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 01:34:32,061 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:34:32" (1/1) ... [2021-11-21 01:34:32,068 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:34:32" (1/1) ... [2021-11-21 01:34:32,088 INFO L137 Inliner]: procedures = 16, calls = 15, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 72 [2021-11-21 01:34:32,089 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 01:34:32,090 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 01:34:32,090 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 01:34:32,090 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 01:34:32,097 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:34:32" (1/1) ... [2021-11-21 01:34:32,097 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:34:32" (1/1) ... [2021-11-21 01:34:32,112 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:34:32" (1/1) ... [2021-11-21 01:34:32,112 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:34:32" (1/1) ... [2021-11-21 01:34:32,117 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:34:32" (1/1) ... [2021-11-21 01:34:32,122 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:34:32" (1/1) ... [2021-11-21 01:34:32,123 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:34:32" (1/1) ... [2021-11-21 01:34:32,125 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 01:34:32,126 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 01:34:32,127 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 01:34:32,127 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 01:34:32,138 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:34:32" (1/1) ... [2021-11-21 01:34:32,143 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:34:32,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:34:32,163 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 01:34:32,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 01:34:32,206 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 01:34:32,206 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 01:34:32,207 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-21 01:34:32,207 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-21 01:34:32,207 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 01:34:32,207 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 01:34:32,207 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-21 01:34:32,208 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-21 01:34:32,272 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 01:34:32,274 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 01:34:32,473 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 01:34:32,535 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 01:34:32,535 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-21 01:34:32,537 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:34:32 BoogieIcfgContainer [2021-11-21 01:34:32,538 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 01:34:32,539 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 01:34:32,540 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 01:34:32,543 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 01:34:32,543 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:34:31" (1/3) ... [2021-11-21 01:34:32,544 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68ace5d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:34:32, skipping insertion in model container [2021-11-21 01:34:32,544 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:34:32" (2/3) ... [2021-11-21 01:34:32,545 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68ace5d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:34:32, skipping insertion in model container [2021-11-21 01:34:32,545 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:34:32" (3/3) ... [2021-11-21 01:34:32,546 INFO L111 eAbstractionObserver]: Analyzing ICFG array29_pattern.c [2021-11-21 01:34:32,551 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 01:34:32,552 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 01:34:32,649 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 01:34:32,660 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 01:34:32,660 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 01:34:32,686 INFO L276 IsEmpty]: Start isEmpty. Operand has 10 states, 8 states have (on average 1.75) internal successors, (14), 9 states have internal predecessors, (14), 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 01:34:32,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-21 01:34:32,691 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:34:32,692 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-21 01:34:32,692 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:34:32,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:34:32,706 INFO L85 PathProgramCache]: Analyzing trace with hash 119188313, now seen corresponding path program 1 times [2021-11-21 01:34:32,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:34:32,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684012412] [2021-11-21 01:34:32,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:34:32,718 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:34:32,826 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:34:32,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [906701512] [2021-11-21 01:34:32,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:34:32,828 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:34:32,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:34:32,831 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:34:32,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 01:34:32,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:34:32,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-21 01:34:32,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:34:33,089 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 01:34:33,090 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:34:33,090 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:34:33,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684012412] [2021-11-21 01:34:33,091 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:34:33,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906701512] [2021-11-21 01:34:33,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906701512] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:34:33,094 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:34:33,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 01:34:33,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325610592] [2021-11-21 01:34:33,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:34:33,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:34:33,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:34:33,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:34:33,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:34:33,141 INFO L87 Difference]: Start difference. First operand has 10 states, 8 states have (on average 1.75) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 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 01:34:33,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:34:33,205 INFO L93 Difference]: Finished difference Result 19 states and 27 transitions. [2021-11-21 01:34:33,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:34:33,209 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-11-21 01:34:33,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:34:33,218 INFO L225 Difference]: With dead ends: 19 [2021-11-21 01:34:33,218 INFO L226 Difference]: Without dead ends: 10 [2021-11-21 01:34:33,221 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 01:34:33,226 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 2 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:34:33,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 7 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:34:33,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-11-21 01:34:33,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 9. [2021-11-21 01:34:33,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.5) 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 01:34:33,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 12 transitions. [2021-11-21 01:34:33,265 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 12 transitions. Word has length 5 [2021-11-21 01:34:33,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:34:33,266 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 12 transitions. [2021-11-21 01:34:33,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 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 01:34:33,266 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 12 transitions. [2021-11-21 01:34:33,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-21 01:34:33,267 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:34:33,267 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:34:33,311 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-21 01:34:33,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:34:33,496 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:34:33,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:34:33,496 INFO L85 PathProgramCache]: Analyzing trace with hash 726180671, now seen corresponding path program 1 times [2021-11-21 01:34:33,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:34:33,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345273872] [2021-11-21 01:34:33,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:34:33,497 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:34:33,507 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:34:33,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [416416891] [2021-11-21 01:34:33,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:34:33,508 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:34:33,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:34:33,509 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:34:33,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 01:34:33,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:34:33,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 01:34:33,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:34:33,628 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:34:33,629 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:34:33,630 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:34:33,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345273872] [2021-11-21 01:34:33,632 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:34:33,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416416891] [2021-11-21 01:34:33,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416416891] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:34:33,634 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:34:33,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:34:33,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503471614] [2021-11-21 01:34:33,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:34:33,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:34:33,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:34:33,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:34:33,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:34:33,638 INFO L87 Difference]: Start difference. First operand 9 states and 12 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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 01:34:33,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:34:33,685 INFO L93 Difference]: Finished difference Result 18 states and 26 transitions. [2021-11-21 01:34:33,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:34:33,686 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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 7 [2021-11-21 01:34:33,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:34:33,687 INFO L225 Difference]: With dead ends: 18 [2021-11-21 01:34:33,687 INFO L226 Difference]: Without dead ends: 11 [2021-11-21 01:34:33,688 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:34:33,691 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 7 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:34:33,692 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 4 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:34:33,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-11-21 01:34:33,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-11-21 01:34:33,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.4) internal successors, (14), 10 states have internal predecessors, (14), 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 01:34:33,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 14 transitions. [2021-11-21 01:34:33,696 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 14 transitions. Word has length 7 [2021-11-21 01:34:33,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:34:33,696 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 14 transitions. [2021-11-21 01:34:33,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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 01:34:33,697 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 14 transitions. [2021-11-21 01:34:33,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-21 01:34:33,698 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:34:33,698 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:34:33,729 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-21 01:34:33,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:34:33,911 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:34:33,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:34:33,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1118258091, now seen corresponding path program 1 times [2021-11-21 01:34:33,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:34:33,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033296403] [2021-11-21 01:34:33,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:34:33,913 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:34:33,920 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:34:33,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [886295101] [2021-11-21 01:34:33,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:34:33,921 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:34:33,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:34:33,931 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:34:33,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-21 01:34:33,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:34:33,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 01:34:33,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:34:34,084 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:34:34,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:34:34,144 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:34:34,145 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:34:34,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033296403] [2021-11-21 01:34:34,145 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:34:34,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886295101] [2021-11-21 01:34:34,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886295101] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:34:34,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1427113631] [2021-11-21 01:34:34,167 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-21 01:34:34,168 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:34:34,173 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:34:34,180 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:34:34,180 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:34:34,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:34,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:34,362 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-21 01:34:34,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-21 01:34:34,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:34,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:34,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 89 [2021-11-21 01:34:34,531 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:34:34,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:34,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 37 [2021-11-21 01:34:34,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:34,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:34:34,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 90 [2021-11-21 01:34:35,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:35,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 21 [2021-11-21 01:34:35,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:34:35,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:34:35,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:34:35,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:35,638 INFO L354 Elim1Store]: treesize reduction 286, result has 22.9 percent of original size [2021-11-21 01:34:35,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 360 treesize of output 437 [2021-11-21 01:34:36,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:36,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 18 [2021-11-21 01:34:36,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:36,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 18 [2021-11-21 01:34:36,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:36,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 18 [2021-11-21 01:34:37,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:34:37,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:37,232 INFO L354 Elim1Store]: treesize reduction 67, result has 1.5 percent of original size [2021-11-21 01:34:37,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 305 treesize of output 237 [2021-11-21 01:34:37,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:34:37,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:34:37,820 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 01:34:37,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 222 treesize of output 165 [2021-11-21 01:34:38,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-21 01:34:38,881 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:34:38,906 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 01:34:38,918 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:34:39,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:34:39,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:39,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:39,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:39,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:39,820 INFO L354 Elim1Store]: treesize reduction 200, result has 12.7 percent of original size [2021-11-21 01:34:39,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 227 treesize of output 271 [2021-11-21 01:34:39,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:39,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 20 [2021-11-21 01:34:40,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:40,106 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-21 01:34:40,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 18 [2021-11-21 01:34:40,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:40,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:40,412 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:34:40,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 63 treesize of output 32 [2021-11-21 01:34:40,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:40,660 INFO L354 Elim1Store]: treesize reduction 25, result has 3.8 percent of original size [2021-11-21 01:34:40,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 195 treesize of output 161 [2021-11-21 01:34:41,114 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:34:41,129 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 01:34:41,180 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 22 treesize of output 18 [2021-11-21 01:34:41,191 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:34:41,468 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 01:34:41,484 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:34:41,504 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:34:41,513 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 22 treesize of output 18 [2021-11-21 01:34:41,639 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:34:41,653 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 22 treesize of output 18 [2021-11-21 01:34:41,688 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:34:41,722 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 01:34:41,877 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 01:34:41,896 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:34:41,917 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 22 treesize of output 18 [2021-11-21 01:34:41,930 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:34:42,164 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 22 treesize of output 18 [2021-11-21 01:34:42,180 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:34:42,201 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 01:34:42,215 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:34:42,388 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:34:42,399 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 22 treesize of output 18 [2021-11-21 01:34:42,417 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 01:34:42,439 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:34:42,599 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 22 treesize of output 18 [2021-11-21 01:34:42,615 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:34:42,643 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 01:34:42,657 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:34:43,193 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 22 treesize of output 18 [2021-11-21 01:34:43,205 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:34:43,235 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 01:34:43,248 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:34:43,355 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:34:43,373 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 22 treesize of output 18 [2021-11-21 01:34:43,417 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 01:34:43,432 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:34:43,607 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 22 treesize of output 18 [2021-11-21 01:34:43,618 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:34:43,637 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 01:34:43,653 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:34:43,659 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:34:43,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1427113631] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:34:43,994 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-21 01:34:43,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4, 4] total 9 [2021-11-21 01:34:43,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467672335] [2021-11-21 01:34:43,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:34:43,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 01:34:43,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:34:43,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 01:34:43,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-21 01:34:43,997 INFO L87 Difference]: Start difference. First operand 11 states and 14 transitions. Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:34:44,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:34:44,300 INFO L93 Difference]: Finished difference Result 19 states and 24 transitions. [2021-11-21 01:34:44,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 01:34:44,302 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-21 01:34:44,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:34:44,302 INFO L225 Difference]: With dead ends: 19 [2021-11-21 01:34:44,302 INFO L226 Difference]: Without dead ends: 16 [2021-11-21 01:34:44,303 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-11-21 01:34:44,304 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 1 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:34:44,305 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 9 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:34:44,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-11-21 01:34:44,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 12. [2021-11-21 01:34:44,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:34:44,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 15 transitions. [2021-11-21 01:34:44,310 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 15 transitions. Word has length 8 [2021-11-21 01:34:44,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:34:44,310 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 15 transitions. [2021-11-21 01:34:44,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:34:44,310 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 15 transitions. [2021-11-21 01:34:44,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-21 01:34:44,311 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:34:44,313 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:34:44,339 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-11-21 01:34:44,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:34:44,517 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:34:44,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:34:44,518 INFO L85 PathProgramCache]: Analyzing trace with hash 1213103331, now seen corresponding path program 1 times [2021-11-21 01:34:44,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:34:44,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379709392] [2021-11-21 01:34:44,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:34:44,519 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:34:44,524 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:34:44,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1997214845] [2021-11-21 01:34:44,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:34:44,525 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:34:44,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:34:44,526 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:34:44,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-21 01:34:44,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:34:44,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-21 01:34:44,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:34:44,655 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:34:44,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:34:44,711 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:34:44,711 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:34:44,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379709392] [2021-11-21 01:34:44,712 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:34:44,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997214845] [2021-11-21 01:34:44,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997214845] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:34:44,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1486815286] [2021-11-21 01:34:44,724 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-21 01:34:44,724 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:34:44,725 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:34:44,725 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:34:44,725 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:34:44,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:44,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:44,884 INFO L354 Elim1Store]: treesize reduction 80, result has 31.6 percent of original size [2021-11-21 01:34:44,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 61 treesize of output 105 [2021-11-21 01:34:44,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 26 [2021-11-21 01:34:45,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:45,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:45,056 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:34:45,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2021-11-21 01:34:45,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:45,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:45,352 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-21 01:34:45,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-21 01:34:45,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:45,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:34:45,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:34:45,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:34:45,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:34:45,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 153 treesize of output 195 [2021-11-21 01:34:45,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:45,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 14 [2021-11-21 01:34:45,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:45,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 26 [2021-11-21 01:34:45,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:45,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 16 [2021-11-21 01:34:46,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:46,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:46,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:34:46,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:34:46,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:34:46,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:46,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:46,463 INFO L354 Elim1Store]: treesize reduction 312, result has 17.7 percent of original size [2021-11-21 01:34:46,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 361 treesize of output 457 [2021-11-21 01:34:46,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:46,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:46,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 39 [2021-11-21 01:34:46,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:46,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:46,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 39 [2021-11-21 01:34:47,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:47,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:47,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 39 [2021-11-21 01:34:47,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:34:47,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:47,234 INFO L354 Elim1Store]: treesize reduction 65, result has 1.5 percent of original size [2021-11-21 01:34:47,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 395 treesize of output 310 [2021-11-21 01:34:47,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:34:47,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:47,753 INFO L354 Elim1Store]: treesize reduction 63, result has 4.5 percent of original size [2021-11-21 01:34:47,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 236 treesize of output 182 [2021-11-21 01:34:48,778 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 01:34:48,796 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:34:48,816 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:34:48,830 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 22 treesize of output 18 [2021-11-21 01:34:49,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:34:49,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:49,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:49,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:49,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:49,393 INFO L354 Elim1Store]: treesize reduction 200, result has 12.7 percent of original size [2021-11-21 01:34:49,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 227 treesize of output 271 [2021-11-21 01:34:49,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:49,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 20 [2021-11-21 01:34:49,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:49,634 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-21 01:34:49,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 18 [2021-11-21 01:34:49,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:49,664 INFO L354 Elim1Store]: treesize reduction 25, result has 3.8 percent of original size [2021-11-21 01:34:49,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 194 treesize of output 152 [2021-11-21 01:34:49,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:49,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:49,985 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:34:49,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 18 [2021-11-21 01:34:50,495 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:34:50,508 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 01:34:50,528 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 22 treesize of output 18 [2021-11-21 01:34:50,537 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:34:50,761 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:34:50,771 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 01:34:50,786 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:34:50,794 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 22 treesize of output 18 [2021-11-21 01:34:50,898 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 01:34:50,923 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:34:50,940 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:34:50,966 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 22 treesize of output 18 [2021-11-21 01:34:51,114 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 22 treesize of output 18 [2021-11-21 01:34:51,127 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:34:51,147 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 01:34:51,160 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:34:51,481 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:34:51,495 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 01:34:51,513 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 22 treesize of output 18 [2021-11-21 01:34:51,526 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:34:51,662 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 01:34:51,673 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:34:51,683 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:34:51,696 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 22 treesize of output 18 [2021-11-21 01:34:51,833 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 22 treesize of output 18 [2021-11-21 01:34:51,845 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:34:51,865 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 01:34:51,878 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:34:53,714 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:34:53,723 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 19 treesize of output 15 [2021-11-21 01:34:53,732 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:34:53,739 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 22 treesize of output 18 [2021-11-21 01:34:53,864 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 22 treesize of output 18 [2021-11-21 01:34:53,881 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:34:53,902 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 01:34:53,930 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:34:54,051 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:34:54,062 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 01:34:54,086 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:34:54,105 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 22 treesize of output 18 [2021-11-21 01:34:54,157 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:34:54,891 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:34:54,891 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 01:34:54,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-11-21 01:34:54,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266798958] [2021-11-21 01:34:54,892 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 01:34:54,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 01:34:54,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:34:54,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 01:34:54,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-11-21 01:34:54,894 INFO L87 Difference]: Start difference. First operand 12 states and 15 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 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 01:34:54,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:34:54,941 INFO L93 Difference]: Finished difference Result 24 states and 32 transitions. [2021-11-21 01:34:54,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:34:54,942 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-21 01:34:54,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:34:54,942 INFO L225 Difference]: With dead ends: 24 [2021-11-21 01:34:54,943 INFO L226 Difference]: Without dead ends: 14 [2021-11-21 01:34:54,943 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-11-21 01:34:54,945 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 8 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:34:54,945 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 4 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:34:54,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-11-21 01:34:54,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-11-21 01:34:54,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 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 01:34:54,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2021-11-21 01:34:54,953 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 11 [2021-11-21 01:34:54,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:34:54,953 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2021-11-21 01:34:54,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 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 01:34:54,954 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2021-11-21 01:34:54,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-21 01:34:54,954 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:34:54,954 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:34:54,980 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-21 01:34:55,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:34:55,155 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:34:55,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:34:55,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1404443406, now seen corresponding path program 2 times [2021-11-21 01:34:55,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:34:55,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778170412] [2021-11-21 01:34:55,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:34:55,156 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:34:55,161 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:34:55,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2095203077] [2021-11-21 01:34:55,161 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:34:55,162 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:34:55,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:34:55,164 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:34:55,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-21 01:34:55,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-21 01:34:55,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:34:55,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-21 01:34:55,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:34:55,270 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-21 01:34:55,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:34:55,320 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-21 01:34:55,320 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:34:55,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778170412] [2021-11-21 01:34:55,321 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:34:55,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095203077] [2021-11-21 01:34:55,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095203077] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:34:55,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1377536856] [2021-11-21 01:34:55,324 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-21 01:34:55,325 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:34:55,325 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:34:55,325 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:34:55,325 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:34:55,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:55,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:55,392 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-21 01:34:55,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-21 01:34:55,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:55,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:55,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 89 [2021-11-21 01:34:55,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:55,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 32 [2021-11-21 01:34:55,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:55,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:34:55,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:34:55,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:34:55,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:34:55,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 153 treesize of output 195 [2021-11-21 01:34:55,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:55,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 16 [2021-11-21 01:34:56,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:56,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 14 [2021-11-21 01:34:56,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:56,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 16 [2021-11-21 01:34:56,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:56,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:56,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:34:56,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:34:56,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:56,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:34:56,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:56,649 INFO L354 Elim1Store]: treesize reduction 312, result has 17.7 percent of original size [2021-11-21 01:34:56,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 361 treesize of output 457 [2021-11-21 01:34:56,747 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:34:56,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:56,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:56,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 39 [2021-11-21 01:34:57,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:57,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:57,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:57,109 INFO L354 Elim1Store]: treesize reduction 50, result has 2.0 percent of original size [2021-11-21 01:34:57,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 435 treesize of output 345 [2021-11-21 01:34:57,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:34:57,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:57,695 INFO L354 Elim1Store]: treesize reduction 63, result has 1.6 percent of original size [2021-11-21 01:34:57,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 331 treesize of output 264 [2021-11-21 01:34:58,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:34:58,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:58,286 INFO L354 Elim1Store]: treesize reduction 61, result has 4.7 percent of original size [2021-11-21 01:34:58,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 234 treesize of output 182 [2021-11-21 01:34:59,120 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 01:34:59,129 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:34:59,140 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:34:59,154 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 22 treesize of output 18 [2021-11-21 01:34:59,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:59,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:59,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:59,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:59,777 INFO L354 Elim1Store]: treesize reduction 180, result has 13.9 percent of original size [2021-11-21 01:34:59,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 211 treesize of output 255 [2021-11-21 01:34:59,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:59,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:34:59,865 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:34:59,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 18 [2021-11-21 01:34:59,959 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:35:00,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:00,126 INFO L354 Elim1Store]: treesize reduction 21, result has 4.5 percent of original size [2021-11-21 01:35:00,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 18 [2021-11-21 01:35:00,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:00,224 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-21 01:35:00,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 131 treesize of output 98 [2021-11-21 01:35:00,577 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 01:35:00,594 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:35:00,624 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 22 treesize of output 18 [2021-11-21 01:35:00,638 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:35:00,876 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 22 treesize of output 18 [2021-11-21 01:35:00,889 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:35:00,921 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 19 treesize of output 15 [2021-11-21 01:35:00,932 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:35:01,076 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 01:35:01,086 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:35:01,104 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 22 treesize of output 18 [2021-11-21 01:35:01,118 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:35:01,262 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:35:01,276 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 22 treesize of output 18 [2021-11-21 01:35:01,301 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 01:35:01,314 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:35:01,533 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:35:01,541 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 19 treesize of output 15 [2021-11-21 01:35:01,557 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:35:01,570 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 22 treesize of output 18 [2021-11-21 01:35:01,732 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:35:01,748 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 22 treesize of output 18 [2021-11-21 01:35:01,771 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:35:01,793 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 01:35:01,891 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 01:35:01,902 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:35:01,915 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:35:01,935 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 22 treesize of output 18 [2021-11-21 01:35:03,691 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 01:35:03,703 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:35:03,722 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 22 treesize of output 18 [2021-11-21 01:35:03,736 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:35:03,903 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 01:35:03,918 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:35:03,932 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:35:03,946 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 22 treesize of output 18 [2021-11-21 01:35:04,051 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 01:35:04,063 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:35:04,079 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:35:04,091 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 22 treesize of output 18 [2021-11-21 01:35:04,147 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:35:04,914 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:35:04,914 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 01:35:04,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2021-11-21 01:35:04,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656243185] [2021-11-21 01:35:04,914 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 01:35:04,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 01:35:04,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:35:04,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 01:35:04,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-11-21 01:35:04,916 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:35:04,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:35:04,963 INFO L93 Difference]: Finished difference Result 29 states and 36 transitions. [2021-11-21 01:35:04,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:35:04,964 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-21 01:35:04,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:35:04,965 INFO L225 Difference]: With dead ends: 29 [2021-11-21 01:35:04,965 INFO L226 Difference]: Without dead ends: 21 [2021-11-21 01:35:04,965 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-11-21 01:35:04,966 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:35:04,967 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 7 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:35:04,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-11-21 01:35:04,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2021-11-21 01:35:04,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:35:04,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2021-11-21 01:35:04,974 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 13 [2021-11-21 01:35:04,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:35:04,974 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2021-11-21 01:35:04,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:35:04,975 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2021-11-21 01:35:04,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-21 01:35:04,976 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:35:04,976 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:35:05,003 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-21 01:35:05,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:35:05,183 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:35:05,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:35:05,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1423484300, now seen corresponding path program 3 times [2021-11-21 01:35:05,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:35:05,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905777717] [2021-11-21 01:35:05,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:35:05,184 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:35:05,189 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:35:05,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1503000862] [2021-11-21 01:35:05,189 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 01:35:05,189 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:35:05,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:35:05,197 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:35:05,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-21 01:35:05,238 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 01:35:05,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:35:05,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-21 01:35:05,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:35:05,311 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-21 01:35:05,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:35:05,365 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-21 01:35:05,365 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:35:05,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905777717] [2021-11-21 01:35:05,365 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:35:05,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503000862] [2021-11-21 01:35:05,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503000862] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:35:05,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1979848640] [2021-11-21 01:35:05,368 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-21 01:35:05,368 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:35:05,369 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:35:05,369 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:35:05,369 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:35:05,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:05,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:05,492 INFO L354 Elim1Store]: treesize reduction 80, result has 31.6 percent of original size [2021-11-21 01:35:05,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 61 treesize of output 105 [2021-11-21 01:35:05,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 26 [2021-11-21 01:35:05,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:05,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:05,619 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:35:05,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2021-11-21 01:35:05,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:05,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:05,836 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-21 01:35:05,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-21 01:35:06,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:06,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:35:06,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 90 [2021-11-21 01:35:06,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:06,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 21 [2021-11-21 01:35:06,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:35:06,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:35:06,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:35:06,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:06,679 INFO L354 Elim1Store]: treesize reduction 270, result has 23.9 percent of original size [2021-11-21 01:35:06,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 360 treesize of output 433 [2021-11-21 01:35:07,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:07,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 18 [2021-11-21 01:35:07,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:07,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 18 [2021-11-21 01:35:07,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:35:07,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:07,570 INFO L354 Elim1Store]: treesize reduction 63, result has 1.6 percent of original size [2021-11-21 01:35:07,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 253 treesize of output 199 [2021-11-21 01:35:07,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:35:07,922 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 01:35:07,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 217 treesize of output 186 [2021-11-21 01:35:09,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:09,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 23 [2021-11-21 01:35:09,714 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 01:35:09,725 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:35:09,738 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:35:09,758 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 22 treesize of output 18 [2021-11-21 01:35:10,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:35:10,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:10,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:10,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:10,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:10,544 INFO L354 Elim1Store]: treesize reduction 200, result has 12.7 percent of original size [2021-11-21 01:35:10,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 227 treesize of output 271 [2021-11-21 01:35:10,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:10,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 20 [2021-11-21 01:35:10,709 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:35:10,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:10,819 INFO L354 Elim1Store]: treesize reduction 25, result has 3.8 percent of original size [2021-11-21 01:35:10,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 20 [2021-11-21 01:35:10,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:10,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:10,861 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:35:10,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 140 treesize of output 109 [2021-11-21 01:35:11,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:11,278 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-21 01:35:11,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 194 treesize of output 157 [2021-11-21 01:35:11,599 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:35:11,615 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 22 treesize of output 18 [2021-11-21 01:35:11,644 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 01:35:11,660 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:35:11,902 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 19 treesize of output 15 [2021-11-21 01:35:11,915 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:35:11,934 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 22 treesize of output 18 [2021-11-21 01:35:11,944 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:35:12,022 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:35:12,035 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 22 treesize of output 18 [2021-11-21 01:35:12,053 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 01:35:12,065 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:35:12,256 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 01:35:12,267 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:35:12,278 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:35:12,300 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 22 treesize of output 18 [2021-11-21 01:35:12,510 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:35:12,521 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 22 treesize of output 18 [2021-11-21 01:35:12,540 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:35:12,553 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 01:35:12,708 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:35:12,725 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 22 treesize of output 18 [2021-11-21 01:35:12,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-21 01:35:12,754 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:35:12,853 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:35:12,863 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 22 treesize of output 18 [2021-11-21 01:35:12,877 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:35:12,890 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 01:35:14,517 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:35:14,529 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 19 treesize of output 15 [2021-11-21 01:35:14,542 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:35:14,552 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 22 treesize of output 18 [2021-11-21 01:35:14,638 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 22 treesize of output 18 [2021-11-21 01:35:14,649 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:35:14,667 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 01:35:14,681 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:35:14,793 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:35:14,801 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 22 treesize of output 18 [2021-11-21 01:35:14,819 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 01:35:14,834 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:35:14,925 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:35:15,681 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:35:15,681 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 01:35:15,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-11-21 01:35:15,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770435084] [2021-11-21 01:35:15,681 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 01:35:15,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-21 01:35:15,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:35:15,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-21 01:35:15,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-11-21 01:35:15,682 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:35:15,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:35:15,805 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2021-11-21 01:35:15,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:35:15,806 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-21 01:35:15,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:35:15,807 INFO L225 Difference]: With dead ends: 31 [2021-11-21 01:35:15,807 INFO L226 Difference]: Without dead ends: 28 [2021-11-21 01:35:15,807 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-11-21 01:35:15,808 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 37 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:35:15,809 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 8 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:35:15,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-11-21 01:35:15,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 22. [2021-11-21 01:35:15,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:35:15,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2021-11-21 01:35:15,816 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 17 [2021-11-21 01:35:15,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:35:15,817 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2021-11-21 01:35:15,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:35:15,817 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2021-11-21 01:35:15,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-21 01:35:15,818 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:35:15,818 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2021-11-21 01:35:15,842 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-21 01:35:16,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-21 01:35:16,018 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:35:16,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:35:16,019 INFO L85 PathProgramCache]: Analyzing trace with hash 708502083, now seen corresponding path program 4 times [2021-11-21 01:35:16,019 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:35:16,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230875965] [2021-11-21 01:35:16,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:35:16,019 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:35:16,024 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:35:16,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1098359642] [2021-11-21 01:35:16,024 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-21 01:35:16,024 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:35:16,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:35:16,047 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:35:16,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-21 01:35:16,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:35:16,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-21 01:35:16,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:35:16,324 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:35:16,337 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 22 treesize of output 18 [2021-11-21 01:35:16,348 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 24 treesize of output 20 [2021-11-21 01:35:16,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:16,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:16,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 97 [2021-11-21 01:35:16,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:16,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 24 [2021-11-21 01:35:16,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:35:16,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:16,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:16,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:16,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:16,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:16,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:16,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:16,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:16,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:16,664 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:35:16,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 6 new quantified variables, introduced 1 case distinctions, treesize of input 180 treesize of output 305 [2021-11-21 01:35:16,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:16,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:16,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:16,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 45 [2021-11-21 01:35:16,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:16,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:16,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:16,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 166 treesize of output 73 [2021-11-21 01:35:16,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:16,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:16,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:16,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 136 treesize of output 51 [2021-11-21 01:35:16,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:16,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:16,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:16,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:16,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:16,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:16,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:16,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:16,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:16,882 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:35:16,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 79 treesize of output 115 [2021-11-21 01:35:16,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:16,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:16,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:16,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:16,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:16,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:16,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 42 [2021-11-21 01:35:17,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:17,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:17,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:17,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:17,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:17,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:35:17,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:17,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:17,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:17,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:17,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:17,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:17,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:35:17,662 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:35:17,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 128 treesize of output 46 [2021-11-21 01:35:17,813 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:35:17,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:35:45,007 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:35:45,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 1923 treesize of output 1923 [2021-11-21 01:35:45,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 4 [2021-11-21 01:35:45,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 4 [2021-11-21 01:35:47,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 4 [2021-11-21 01:35:47,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 4 [2021-11-21 01:35:49,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 4 [2021-11-21 01:35:50,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 4 [2021-11-21 01:35:51,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 4 [2021-11-21 01:35:53,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 4 [2021-11-21 01:35:54,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1907 treesize of output 1843 [2021-11-21 01:38:30,769 WARN L227 SmtUtils]: Spent 2.60m on a formula simplification. DAG size of input: 215 DAG size of output: 155 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-21 01:38:30,782 INFO L354 Elim1Store]: treesize reduction 473, result has 55.1 percent of original size [2021-11-21 01:38:30,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 48074668 treesize of output 45726648 [2021-11-21 01:40:20,089 WARN L227 SmtUtils]: Spent 1.82m on a formula simplification that was a NOOP. DAG size: 6808 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-21 01:40:20,819 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:40:20,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230875965] [2021-11-21 01:40:20,819 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:40:20,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098359642] [2021-11-21 01:40:20,820 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-21 01:40:20,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [23843923] [2021-11-21 01:40:20,824 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-21 01:40:20,824 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:40:20,824 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:40:20,824 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:40:20,825 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:40:20,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:40:20,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:40:20,941 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-21 01:40:20,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-21 01:40:21,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:40:21,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:40:21,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 89 [2021-11-21 01:40:21,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:40:21,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 34 [2021-11-21 01:40:21,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:40:21,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:40:21,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:40:21,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:40:21,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:40:21,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 153 treesize of output 195 [2021-11-21 01:40:21,583 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:40:21,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:40:21,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 20 [2021-11-21 01:40:21,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:40:21,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 28 [2021-11-21 01:40:21,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:40:21,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 26 [2021-11-21 01:40:21,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:40:21,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:40:21,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:40:21,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:40:22,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:40:22,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:40:22,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:40:22,249 INFO L354 Elim1Store]: treesize reduction 312, result has 17.7 percent of original size [2021-11-21 01:40:22,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 361 treesize of output 457 [2021-11-21 01:40:22,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:40:22,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:40:22,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 37 [2021-11-21 01:40:22,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:40:22,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:40:22,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 37 [2021-11-21 01:40:22,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:40:22,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:40:22,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 39 [2021-11-21 01:40:22,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:40:22,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:40:22,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:40:22,994 INFO L354 Elim1Store]: treesize reduction 50, result has 2.0 percent of original size [2021-11-21 01:40:22,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 400 treesize of output 346 [2021-11-21 01:40:23,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:40:23,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:40:23,679 INFO L354 Elim1Store]: treesize reduction 61, result has 4.7 percent of original size [2021-11-21 01:40:23,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 234 treesize of output 182 [2021-11-21 01:40:24,618 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 22 treesize of output 18 [2021-11-21 01:40:24,636 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:40:24,656 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:40:24,682 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 01:40:25,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:40:25,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:40:25,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:40:25,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:40:25,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:40:25,628 INFO L354 Elim1Store]: treesize reduction 200, result has 12.7 percent of original size [2021-11-21 01:40:25,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 227 treesize of output 271 [2021-11-21 01:40:25,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:40:25,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:40:25,726 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:40:25,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 18 [2021-11-21 01:40:25,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:40:25,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 18 [2021-11-21 01:40:25,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:40:25,913 INFO L354 Elim1Store]: treesize reduction 25, result has 3.8 percent of original size [2021-11-21 01:40:25,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 20 [2021-11-21 01:40:25,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:40:25,953 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 01:40:25,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 132 treesize of output 104 [2021-11-21 01:40:26,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:40:26,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:40:26,416 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:40:26,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 18 [2021-11-21 01:40:26,804 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:40:26,827 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 22 treesize of output 18 [2021-11-21 01:40:26,848 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:40:26,874 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 01:40:27,081 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 22 treesize of output 18 [2021-11-21 01:40:27,095 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:40:27,124 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:40:27,143 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 19 treesize of output 15 [2021-11-21 01:40:27,303 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 22 treesize of output 18 [2021-11-21 01:40:27,319 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:40:27,357 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 01:40:27,372 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:40:27,524 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:40:27,546 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 22 treesize of output 18 [2021-11-21 01:40:27,587 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 01:40:27,603 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:40:29,718 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:40:29,734 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 19 treesize of output 15 [2021-11-21 01:40:29,750 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:40:29,763 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 22 treesize of output 18 [2021-11-21 01:40:29,900 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 01:40:29,916 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:40:29,936 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 22 treesize of output 18 [2021-11-21 01:40:29,958 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:40:30,158 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 01:40:30,180 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:40:30,206 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 22 treesize of output 18 [2021-11-21 01:40:30,223 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 01:40:30,331 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:40:32,555 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:40:32,555 INFO L186 FreeRefinementEngine]: Found 0 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:40:32,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-11-21 01:40:32,555 ERROR L172 FreeRefinementEngine]: Strategy SIFA_TAIPAN failed to provide any proof altough trace is infeasible [2021-11-21 01:40:32,555 INFO L628 BasicCegarLoop]: Counterexample might be feasible [2021-11-21 01:40:32,561 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-21 01:40:32,587 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-11-21 01:40:32,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:40:32,770 INFO L732 BasicCegarLoop]: Path program histogram: [4, 1, 1, 1] [2021-11-21 01:40:32,772 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-21 01:40:32,789 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.11 01:40:32 BoogieIcfgContainer [2021-11-21 01:40:32,789 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-21 01:40:32,790 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-21 01:40:32,790 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-21 01:40:32,790 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-21 01:40:32,791 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:34:32" (3/4) ... [2021-11-21 01:40:32,793 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-21 01:40:32,794 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-21 01:40:32,794 INFO L158 Benchmark]: Toolchain (without parser) took 361054.67ms. Allocated memory was 130.0MB in the beginning and 339.7MB in the end (delta: 209.7MB). Free memory was 97.6MB in the beginning and 243.6MB in the end (delta: -146.0MB). Peak memory consumption was 64.8MB. Max. memory is 16.1GB. [2021-11-21 01:40:32,795 INFO L158 Benchmark]: CDTParser took 0.27ms. Allocated memory is still 79.7MB. Free memory was 35.7MB in the beginning and 35.7MB in the end (delta: 44.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-21 01:40:32,795 INFO L158 Benchmark]: CACSL2BoogieTranslator took 311.58ms. Allocated memory is still 130.0MB. Free memory was 97.6MB in the beginning and 106.0MB in the end (delta: -8.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-21 01:40:32,795 INFO L158 Benchmark]: Boogie Procedure Inliner took 35.70ms. Allocated memory is still 130.0MB. Free memory was 106.0MB in the beginning and 104.5MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-21 01:40:32,796 INFO L158 Benchmark]: Boogie Preprocessor took 35.78ms. Allocated memory is still 130.0MB. Free memory was 104.5MB in the beginning and 103.2MB in the end (delta: 1.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-21 01:40:32,796 INFO L158 Benchmark]: RCFGBuilder took 411.52ms. Allocated memory is still 130.0MB. Free memory was 103.2MB in the beginning and 90.3MB in the end (delta: 13.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-21 01:40:32,796 INFO L158 Benchmark]: TraceAbstraction took 360249.91ms. Allocated memory was 130.0MB in the beginning and 339.7MB in the end (delta: 209.7MB). Free memory was 89.9MB in the beginning and 243.6MB in the end (delta: -153.7MB). Peak memory consumption was 59.1MB. Max. memory is 16.1GB. [2021-11-21 01:40:32,797 INFO L158 Benchmark]: Witness Printer took 4.00ms. Allocated memory is still 339.7MB. Free memory is still 243.6MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-21 01:40:32,798 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27ms. Allocated memory is still 79.7MB. Free memory was 35.7MB in the beginning and 35.7MB in the end (delta: 44.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 311.58ms. Allocated memory is still 130.0MB. Free memory was 97.6MB in the beginning and 106.0MB in the end (delta: -8.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 35.70ms. Allocated memory is still 130.0MB. Free memory was 106.0MB in the beginning and 104.5MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 35.78ms. Allocated memory is still 130.0MB. Free memory was 104.5MB in the beginning and 103.2MB in the end (delta: 1.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 411.52ms. Allocated memory is still 130.0MB. Free memory was 103.2MB in the beginning and 90.3MB in the end (delta: 13.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 360249.91ms. Allocated memory was 130.0MB in the beginning and 339.7MB in the end (delta: 209.7MB). Free memory was 89.9MB in the beginning and 243.6MB in the end (delta: -153.7MB). Peak memory consumption was 59.1MB. Max. memory is 16.1GB. * Witness Printer took 4.00ms. Allocated memory is still 339.7MB. Free memory is still 243.6MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 31]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L35] signed long long ARR_SIZE ; [L40] ARR_SIZE = (signed long long)__VERIFIER_nondet_short() [L41] CALL assume_abort_if_not(ARR_SIZE > 1) [L29] COND TRUE !cond [L41] RET assume_abort_if_not(ARR_SIZE > 1) [L43] int array[ARR_SIZE][ARR_SIZE] ; [L45] int row = 0, column = 0 ; [L46] signed long long sum = 0 ; [L48] row=0 [L48] COND TRUE row main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/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 -> c79b0cfbfa84c2390344382edf3f60a855c5e1f87aaed3ee77c2dd6c5f017188 [2021-11-21 01:40:35,937 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 01:40:35,961 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 01:40:35,964 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 01:40:35,966 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 01:40:35,967 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 01:40:35,968 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/array-patterns/array29_pattern.c [2021-11-21 01:40:36,043 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/data/1f9526aa6/2f97bea143314af9b22883aabc6fc141/FLAGbcb8b2a6a [2021-11-21 01:40:36,551 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 01:40:36,551 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/sv-benchmarks/c/array-patterns/array29_pattern.c [2021-11-21 01:40:36,558 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/data/1f9526aa6/2f97bea143314af9b22883aabc6fc141/FLAGbcb8b2a6a [2021-11-21 01:40:36,893 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/data/1f9526aa6/2f97bea143314af9b22883aabc6fc141 [2021-11-21 01:40:36,896 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 01:40:36,898 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 01:40:36,899 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 01:40:36,900 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 01:40:36,903 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 01:40:36,904 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:40:36" (1/1) ... [2021-11-21 01:40:36,905 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e47636a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:40:36, skipping insertion in model container [2021-11-21 01:40:36,906 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:40:36" (1/1) ... [2021-11-21 01:40:36,913 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 01:40:36,928 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 01:40:37,069 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_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/sv-benchmarks/c/array-patterns/array29_pattern.c[1255,1268] [2021-11-21 01:40:37,089 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:40:37,099 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 01:40:37,113 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_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/sv-benchmarks/c/array-patterns/array29_pattern.c[1255,1268] [2021-11-21 01:40:37,123 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:40:37,169 INFO L208 MainTranslator]: Completed translation [2021-11-21 01:40:37,169 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:40:37 WrapperNode [2021-11-21 01:40:37,170 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 01:40:37,180 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 01:40:37,180 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 01:40:37,180 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 01:40:37,187 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:40:37" (1/1) ... [2021-11-21 01:40:37,210 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:40:37" (1/1) ... [2021-11-21 01:40:37,240 INFO L137 Inliner]: procedures = 18, calls = 15, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 71 [2021-11-21 01:40:37,240 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 01:40:37,241 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 01:40:37,242 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 01:40:37,242 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 01:40:37,251 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:40:37" (1/1) ... [2021-11-21 01:40:37,251 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:40:37" (1/1) ... [2021-11-21 01:40:37,258 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:40:37" (1/1) ... [2021-11-21 01:40:37,258 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:40:37" (1/1) ... [2021-11-21 01:40:37,278 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:40:37" (1/1) ... [2021-11-21 01:40:37,283 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:40:37" (1/1) ... [2021-11-21 01:40:37,291 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:40:37" (1/1) ... [2021-11-21 01:40:37,298 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 01:40:37,301 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 01:40:37,302 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 01:40:37,304 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 01:40:37,305 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:40:37" (1/1) ... [2021-11-21 01:40:37,313 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:40:37,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:40:37,342 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 01:40:37,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 01:40:37,396 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 01:40:37,396 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-21 01:40:37,396 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-21 01:40:37,396 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-21 01:40:37,397 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 01:40:37,397 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 01:40:37,397 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-21 01:40:37,397 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-21 01:40:37,497 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 01:40:37,499 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 01:40:38,149 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 01:40:38,156 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 01:40:38,156 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-21 01:40:38,158 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:40:38 BoogieIcfgContainer [2021-11-21 01:40:38,158 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 01:40:38,160 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 01:40:38,160 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 01:40:38,164 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 01:40:38,171 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:40:36" (1/3) ... [2021-11-21 01:40:38,172 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19db8acf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:40:38, skipping insertion in model container [2021-11-21 01:40:38,172 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:40:37" (2/3) ... [2021-11-21 01:40:38,173 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19db8acf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:40:38, skipping insertion in model container [2021-11-21 01:40:38,173 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:40:38" (3/3) ... [2021-11-21 01:40:38,175 INFO L111 eAbstractionObserver]: Analyzing ICFG array29_pattern.c [2021-11-21 01:40:38,181 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 01:40:38,195 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 01:40:38,251 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 01:40:38,260 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 01:40:38,260 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 01:40:38,278 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 20 states have (on average 1.6) internal successors, (32), 21 states have internal predecessors, (32), 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 01:40:38,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-21 01:40:38,285 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:40:38,286 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:40:38,287 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:40:38,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:40:38,293 INFO L85 PathProgramCache]: Analyzing trace with hash -468356531, now seen corresponding path program 1 times [2021-11-21 01:40:38,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:40:38,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [179472183] [2021-11-21 01:40:38,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:40:38,310 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:40:38,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:40:38,314 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:40:38,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-21 01:40:38,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:40:38,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-21 01:40:38,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:40:38,662 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 01:40:38,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:40:38,722 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 01:40:38,723 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:40:38,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [179472183] [2021-11-21 01:40:38,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [179472183] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:40:38,725 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:40:38,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-21 01:40:38,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921918549] [2021-11-21 01:40:38,730 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:40:38,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-21 01:40:38,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:40:38,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-21 01:40:38,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-21 01:40:38,785 INFO L87 Difference]: Start difference. First operand has 22 states, 20 states have (on average 1.6) internal successors, (32), 21 states have internal predecessors, (32), 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 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:40:38,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:40:38,807 INFO L93 Difference]: Finished difference Result 41 states and 60 transitions. [2021-11-21 01:40:38,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-21 01:40:38,810 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-21 01:40:38,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:40:38,820 INFO L225 Difference]: With dead ends: 41 [2021-11-21 01:40:38,820 INFO L226 Difference]: Without dead ends: 18 [2021-11-21 01:40:38,827 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-21 01:40:38,834 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:40:38,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:40:38,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-21 01:40:38,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-11-21 01:40:38,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:40:38,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2021-11-21 01:40:38,884 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 10 [2021-11-21 01:40:38,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:40:38,885 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2021-11-21 01:40:38,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:40:38,886 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2021-11-21 01:40:38,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-21 01:40:38,887 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:40:38,887 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:40:38,908 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-21 01:40:39,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:40:39,104 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:40:39,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:40:39,105 INFO L85 PathProgramCache]: Analyzing trace with hash -1936709868, now seen corresponding path program 1 times [2021-11-21 01:40:39,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:40:39,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [963100430] [2021-11-21 01:40:39,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:40:39,107 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:40:39,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:40:39,108 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:40:39,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-21 01:40:39,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:40:39,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-21 01:40:39,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:40:39,663 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 01:40:39,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:40:39,903 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 01:40:39,904 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:40:39,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [963100430] [2021-11-21 01:40:39,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [963100430] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:40:39,905 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:40:39,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-21 01:40:39,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708148269] [2021-11-21 01:40:39,906 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:40:39,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-21 01:40:39,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:40:39,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-21 01:40:39,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:40:39,918 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 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 01:40:40,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:40:40,532 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2021-11-21 01:40:40,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:40:40,544 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-21 01:40:40,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:40:40,545 INFO L225 Difference]: With dead ends: 28 [2021-11-21 01:40:40,545 INFO L226 Difference]: Without dead ends: 19 [2021-11-21 01:40:40,546 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:40:40,548 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 3 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 15 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-21 01:40:40,549 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 37 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 15 Unchecked, 0.6s Time] [2021-11-21 01:40:40,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-11-21 01:40:40,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-11-21 01:40:40,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:40:40,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2021-11-21 01:40:40,555 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 10 [2021-11-21 01:40:40,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:40:40,556 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2021-11-21 01:40:40,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 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 01:40:40,557 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2021-11-21 01:40:40,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-21 01:40:40,557 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:40:40,558 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:40:40,577 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-21 01:40:40,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:40:40,772 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:40:40,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:40:40,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1411380456, now seen corresponding path program 1 times [2021-11-21 01:40:40,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:40:40,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [933517005] [2021-11-21 01:40:40,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:40:40,774 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:40:40,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:40:40,777 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:40:40,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-21 01:40:40,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:40:40,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-21 01:40:40,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:40:41,345 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:40:41,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:40:41,570 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:40:41,570 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:40:41,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [933517005] [2021-11-21 01:40:41,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [933517005] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:40:41,572 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:40:41,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-21 01:40:41,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979586467] [2021-11-21 01:40:41,577 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:40:41,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-21 01:40:41,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:40:41,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-21 01:40:41,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:40:41,582 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:40:41,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:40:41,977 INFO L93 Difference]: Finished difference Result 34 states and 43 transitions. [2021-11-21 01:40:41,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:40:41,981 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-21 01:40:41,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:40:41,982 INFO L225 Difference]: With dead ends: 34 [2021-11-21 01:40:41,982 INFO L226 Difference]: Without dead ends: 20 [2021-11-21 01:40:41,983 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:40:41,984 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 01:40:41,985 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 39 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 28 Unchecked, 0.4s Time] [2021-11-21 01:40:41,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-21 01:40:41,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-11-21 01:40:41,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 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 01:40:41,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2021-11-21 01:40:41,991 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 13 [2021-11-21 01:40:41,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:40:41,999 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2021-11-21 01:40:41,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:40:41,999 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2021-11-21 01:40:42,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-21 01:40:42,000 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:40:42,000 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:40:42,012 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-21 01:40:42,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:40:42,207 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:40:42,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:40:42,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1019100115, now seen corresponding path program 1 times [2021-11-21 01:40:42,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:40:42,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1526589645] [2021-11-21 01:40:42,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:40:42,209 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:40:42,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:40:42,210 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:40:42,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-21 01:40:42,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:40:42,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-21 01:40:42,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:40:42,834 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:40:42,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:40:43,098 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:40:43,098 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:40:43,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1526589645] [2021-11-21 01:40:43,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1526589645] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:40:43,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [906200239] [2021-11-21 01:40:43,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:40:43,100 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:40:43,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:40:43,103 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:40:43,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2021-11-21 01:40:43,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:40:43,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-21 01:40:43,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:40:44,012 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:40:44,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:40:44,649 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:40:44,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [906200239] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:40:44,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648184195] [2021-11-21 01:40:44,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:40:44,650 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:40:44,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:40:44,656 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:40:44,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-21 01:40:44,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:40:44,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-21 01:40:44,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:40:45,148 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:40:45,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:40:45,222 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:40:45,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648184195] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-21 01:40:45,223 INFO L186 FreeRefinementEngine]: Found 1 perfect and 5 imperfect interpolant sequences. [2021-11-21 01:40:45,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 6, 8, 7, 5] total 23 [2021-11-21 01:40:45,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85975461] [2021-11-21 01:40:45,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:40:45,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:40:45,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:40:45,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:40:45,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2021-11-21 01:40:45,225 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:40:45,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:40:45,543 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2021-11-21 01:40:45,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:40:45,558 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-21 01:40:45,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:40:45,559 INFO L225 Difference]: With dead ends: 25 [2021-11-21 01:40:45,559 INFO L226 Difference]: Without dead ends: 21 [2021-11-21 01:40:45,560 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=127, Invalid=425, Unknown=0, NotChecked=0, Total=552 [2021-11-21 01:40:45,561 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 26 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:40:45,562 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 14 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:40:45,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-11-21 01:40:45,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-11-21 01:40:45,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 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 01:40:45,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2021-11-21 01:40:45,568 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 16 [2021-11-21 01:40:45,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:40:45,568 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2021-11-21 01:40:45,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:40:45,569 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2021-11-21 01:40:45,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-21 01:40:45,570 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:40:45,570 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:40:45,607 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-21 01:40:45,797 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-21 01:40:45,993 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (6)] Forceful destruction successful, exit code 0 [2021-11-21 01:40:46,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt [2021-11-21 01:40:46,188 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:40:46,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:40:46,189 INFO L85 PathProgramCache]: Analyzing trace with hash -1758364073, now seen corresponding path program 1 times [2021-11-21 01:40:46,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:40:46,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1903517699] [2021-11-21 01:40:46,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:40:46,190 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:40:46,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:40:46,191 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:40:46,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-21 01:40:46,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:40:46,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-21 01:40:46,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:40:46,716 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:40:46,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:40:46,971 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:40:46,972 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:40:46,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1903517699] [2021-11-21 01:40:46,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1903517699] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:40:46,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [101642352] [2021-11-21 01:40:46,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:40:46,973 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:40:46,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:40:46,974 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:40:46,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-11-21 01:40:47,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:40:47,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-21 01:40:47,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:40:47,832 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:40:47,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:40:48,267 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:40:48,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [101642352] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:40:48,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793955656] [2021-11-21 01:40:48,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:40:48,268 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:40:48,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:40:48,270 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:40:48,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-21 01:40:48,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:40:48,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-21 01:40:48,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:40:48,899 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:40:48,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:40:49,439 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:40:49,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793955656] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:40:49,440 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 01:40:49,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 8, 7, 6, 8] total 27 [2021-11-21 01:40:49,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131113928] [2021-11-21 01:40:49,440 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 01:40:49,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-21 01:40:49,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:40:49,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-21 01:40:49,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=544, Unknown=0, NotChecked=0, Total=702 [2021-11-21 01:40:49,443 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 27 states, 27 states have (on average 2.814814814814815) internal successors, (76), 27 states have internal predecessors, (76), 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 01:40:51,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:40:51,172 INFO L93 Difference]: Finished difference Result 71 states and 97 transitions. [2021-11-21 01:40:51,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-21 01:40:51,173 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.814814814814815) internal successors, (76), 27 states have internal predecessors, (76), 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 19 [2021-11-21 01:40:51,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:40:51,175 INFO L225 Difference]: With dead ends: 71 [2021-11-21 01:40:51,175 INFO L226 Difference]: Without dead ends: 56 [2021-11-21 01:40:51,177 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=284, Invalid=976, Unknown=0, NotChecked=0, Total=1260 [2021-11-21 01:40:51,178 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 63 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 127 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:40:51,178 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 59 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 164 Invalid, 0 Unknown, 127 Unchecked, 1.0s Time] [2021-11-21 01:40:51,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-11-21 01:40:51,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 45. [2021-11-21 01:40:51,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.2727272727272727) internal successors, (56), 44 states have internal predecessors, (56), 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 01:40:51,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 56 transitions. [2021-11-21 01:40:51,189 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 56 transitions. Word has length 19 [2021-11-21 01:40:51,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:40:51,190 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 56 transitions. [2021-11-21 01:40:51,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.814814814814815) internal successors, (76), 27 states have internal predecessors, (76), 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 01:40:51,190 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 56 transitions. [2021-11-21 01:40:51,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-21 01:40:51,192 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:40:51,192 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:40:51,236 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-21 01:40:51,413 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2021-11-21 01:40:51,620 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-11-21 01:40:51,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:40:51,812 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:40:51,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:40:51,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1309634075, now seen corresponding path program 1 times [2021-11-21 01:40:51,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:40:51,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [745268375] [2021-11-21 01:40:51,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:40:51,813 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:40:51,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:40:51,813 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:40:51,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-21 01:40:51,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:40:51,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 01:40:51,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:40:52,038 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:40:52,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:40:52,110 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:40:52,110 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:40:52,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [745268375] [2021-11-21 01:40:52,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [745268375] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:40:52,111 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:40:52,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-21 01:40:52,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676901352] [2021-11-21 01:40:52,111 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:40:52,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:40:52,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:40:52,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:40:52,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:40:52,113 INFO L87 Difference]: Start difference. First operand 45 states and 56 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 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 01:40:52,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:40:52,282 INFO L93 Difference]: Finished difference Result 72 states and 90 transitions. [2021-11-21 01:40:52,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:40:52,286 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-21 01:40:52,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:40:52,287 INFO L225 Difference]: With dead ends: 72 [2021-11-21 01:40:52,287 INFO L226 Difference]: Without dead ends: 56 [2021-11-21 01:40:52,288 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:40:52,289 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 12 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:40:52,290 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 26 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:40:52,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-11-21 01:40:52,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 45. [2021-11-21 01:40:52,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.25) internal successors, (55), 44 states have internal predecessors, (55), 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 01:40:52,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 55 transitions. [2021-11-21 01:40:52,299 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 55 transitions. Word has length 21 [2021-11-21 01:40:52,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:40:52,300 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 55 transitions. [2021-11-21 01:40:52,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 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 01:40:52,300 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 55 transitions. [2021-11-21 01:40:52,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-21 01:40:52,301 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:40:52,301 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:40:52,316 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-21 01:40:52,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:40:52,515 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:40:52,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:40:52,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1482958944, now seen corresponding path program 1 times [2021-11-21 01:40:52,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:40:52,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1121025249] [2021-11-21 01:40:52,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:40:52,517 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:40:52,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:40:52,519 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:40:52,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-21 01:40:52,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:40:52,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-21 01:40:52,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:40:53,354 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:40:53,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:40:53,970 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:40:53,970 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:40:53,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1121025249] [2021-11-21 01:40:53,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1121025249] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:40:53,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [409642008] [2021-11-21 01:40:53,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:40:53,971 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:40:53,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:40:53,983 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:40:53,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-21 01:40:54,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:40:54,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-21 01:40:54,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:40:54,820 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:40:54,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:40:55,376 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:40:55,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [409642008] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:40:55,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423878848] [2021-11-21 01:40:55,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:40:55,377 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:40:55,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:40:55,378 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:40:55,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-21 01:40:55,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:40:55,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-21 01:40:55,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:40:56,067 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-21 01:40:56,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:40:56,500 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-21 01:40:56,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423878848] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:40:56,501 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 01:40:56,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 9, 6, 8] total 31 [2021-11-21 01:40:56,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911788490] [2021-11-21 01:40:56,501 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 01:40:56,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-21 01:40:56,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:40:56,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-21 01:40:56,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=704, Unknown=0, NotChecked=0, Total=930 [2021-11-21 01:40:56,504 INFO L87 Difference]: Start difference. First operand 45 states and 55 transitions. Second operand has 31 states, 31 states have (on average 2.6451612903225805) internal successors, (82), 31 states have internal predecessors, (82), 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 01:40:59,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:40:59,393 INFO L93 Difference]: Finished difference Result 97 states and 123 transitions. [2021-11-21 01:40:59,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-21 01:40:59,394 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.6451612903225805) internal successors, (82), 31 states have internal predecessors, (82), 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 24 [2021-11-21 01:40:59,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:40:59,396 INFO L225 Difference]: With dead ends: 97 [2021-11-21 01:40:59,396 INFO L226 Difference]: Without dead ends: 86 [2021-11-21 01:40:59,398 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 109 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 883 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=528, Invalid=1922, Unknown=0, NotChecked=0, Total=2450 [2021-11-21 01:40:59,399 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 75 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 108 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-21 01:40:59,399 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 36 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 141 Invalid, 0 Unknown, 108 Unchecked, 0.9s Time] [2021-11-21 01:40:59,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-11-21 01:40:59,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 64. [2021-11-21 01:40:59,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.3174603174603174) internal successors, (83), 63 states have internal predecessors, (83), 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 01:40:59,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 83 transitions. [2021-11-21 01:40:59,414 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 83 transitions. Word has length 24 [2021-11-21 01:40:59,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:40:59,415 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 83 transitions. [2021-11-21 01:40:59,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.6451612903225805) internal successors, (82), 31 states have internal predecessors, (82), 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 01:40:59,415 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 83 transitions. [2021-11-21 01:40:59,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-21 01:40:59,417 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:40:59,417 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:40:59,428 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-21 01:40:59,646 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-21 01:40:59,822 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-11-21 01:41:00,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt [2021-11-21 01:41:00,020 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:41:00,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:41:00,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1394991988, now seen corresponding path program 1 times [2021-11-21 01:41:00,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:41:00,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1735127771] [2021-11-21 01:41:00,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:41:00,021 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:41:00,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:41:00,022 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:41:00,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-21 01:41:00,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:41:00,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 01:41:00,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:41:00,319 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-21 01:41:00,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:41:00,471 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-21 01:41:00,471 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:41:00,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1735127771] [2021-11-21 01:41:00,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1735127771] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:41:00,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [521676057] [2021-11-21 01:41:00,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:41:00,472 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:41:00,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:41:00,475 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:41:00,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-11-21 01:41:00,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:41:00,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 01:41:00,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:41:00,654 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-21 01:41:00,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:41:00,763 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-21 01:41:00,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [521676057] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:41:00,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005202] [2021-11-21 01:41:00,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:41:00,764 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:41:00,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:41:00,765 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:41:00,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-21 01:41:00,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:41:00,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 01:41:00,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:41:01,011 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-21 01:41:01,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:41:01,119 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-21 01:41:01,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005202] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:41:01,119 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 01:41:01,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2021-11-21 01:41:01,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100528204] [2021-11-21 01:41:01,120 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 01:41:01,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-21 01:41:01,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:41:01,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-21 01:41:01,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:41:01,121 INFO L87 Difference]: Start difference. First operand 64 states and 83 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 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 01:41:01,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:41:01,551 INFO L93 Difference]: Finished difference Result 123 states and 162 transitions. [2021-11-21 01:41:01,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-21 01:41:01,552 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 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 32 [2021-11-21 01:41:01,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:41:01,553 INFO L225 Difference]: With dead ends: 123 [2021-11-21 01:41:01,553 INFO L226 Difference]: Without dead ends: 72 [2021-11-21 01:41:01,554 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-11-21 01:41:01,554 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 41 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 01:41:01,555 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 44 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 01:41:01,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-11-21 01:41:01,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 53. [2021-11-21 01:41:01,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.2692307692307692) internal successors, (66), 52 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:41:01,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 66 transitions. [2021-11-21 01:41:01,568 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 66 transitions. Word has length 32 [2021-11-21 01:41:01,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:41:01,568 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 66 transitions. [2021-11-21 01:41:01,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 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 01:41:01,569 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 66 transitions. [2021-11-21 01:41:01,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-21 01:41:01,570 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:41:01,570 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:41:01,575 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2021-11-21 01:41:01,802 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-11-21 01:41:01,985 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-11-21 01:41:02,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:41:02,173 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:41:02,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:41:02,173 INFO L85 PathProgramCache]: Analyzing trace with hash -410446346, now seen corresponding path program 2 times [2021-11-21 01:41:02,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:41:02,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1392901131] [2021-11-21 01:41:02,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 01:41:02,174 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:41:02,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:41:02,174 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:41:02,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-21 01:41:02,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 01:41:02,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:41:02,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-21 01:41:02,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:41:02,905 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-21 01:41:02,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:41:03,448 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-21 01:41:03,448 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:41:03,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1392901131] [2021-11-21 01:41:03,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1392901131] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:41:03,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [186869471] [2021-11-21 01:41:03,449 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 01:41:03,449 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:41:03,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:41:03,450 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:41:03,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-21 01:41:03,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 01:41:03,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:41:03,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-21 01:41:03,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:41:04,486 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-21 01:41:04,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:41:05,076 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-21 01:41:05,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [186869471] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:41:05,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6776447] [2021-11-21 01:41:05,076 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 01:41:05,077 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:41:05,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:41:05,091 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:41:05,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-21 01:41:05,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 01:41:05,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:41:05,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-21 01:41:05,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:41:05,666 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-21 01:41:05,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:41:05,952 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-21 01:41:05,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6776447] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:41:05,952 INFO L186 FreeRefinementEngine]: Found 2 perfect and 4 imperfect interpolant sequences. [2021-11-21 01:41:05,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [7, 9, 10, 8] total 33 [2021-11-21 01:41:05,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366252248] [2021-11-21 01:41:05,953 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:41:05,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-21 01:41:05,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:41:05,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-21 01:41:05,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=824, Unknown=0, NotChecked=0, Total=1056 [2021-11-21 01:41:05,955 INFO L87 Difference]: Start difference. First operand 53 states and 66 transitions. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:41:06,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:41:06,864 INFO L93 Difference]: Finished difference Result 87 states and 112 transitions. [2021-11-21 01:41:06,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-21 01:41:06,880 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-11-21 01:41:06,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:41:06,881 INFO L225 Difference]: With dead ends: 87 [2021-11-21 01:41:06,881 INFO L226 Difference]: Without dead ends: 63 [2021-11-21 01:41:06,882 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=292, Invalid=1040, Unknown=0, NotChecked=0, Total=1332 [2021-11-21 01:41:06,883 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 44 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 01:41:06,883 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 22 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 01:41:06,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-11-21 01:41:06,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-11-21 01:41:06,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.2419354838709677) internal successors, (77), 62 states have internal predecessors, (77), 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 01:41:06,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 77 transitions. [2021-11-21 01:41:06,896 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 77 transitions. Word has length 32 [2021-11-21 01:41:06,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:41:06,896 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 77 transitions. [2021-11-21 01:41:06,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:41:06,897 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 77 transitions. [2021-11-21 01:41:06,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-21 01:41:06,898 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:41:06,899 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:41:06,920 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-21 01:41:07,118 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (19)] Ended with exit code 0 [2021-11-21 01:41:07,349 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-21 01:41:07,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:41:07,515 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:41:07,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:41:07,516 INFO L85 PathProgramCache]: Analyzing trace with hash -76497882, now seen corresponding path program 3 times [2021-11-21 01:41:07,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:41:07,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1221880669] [2021-11-21 01:41:07,516 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:41:07,516 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:41:07,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:41:07,518 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:41:07,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-21 01:41:07,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-21 01:41:07,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:41:07,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-21 01:41:07,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:41:08,215 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-21 01:41:08,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:41:08,485 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-21 01:41:08,485 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:41:08,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1221880669] [2021-11-21 01:41:08,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1221880669] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:41:08,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1718218833] [2021-11-21 01:41:08,486 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:41:08,486 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:41:08,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:41:08,497 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:41:08,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-11-21 01:41:08,768 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-21 01:41:08,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:41:08,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-21 01:41:08,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:41:09,059 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-21 01:41:09,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:41:09,405 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-21 01:41:09,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1718218833] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:41:09,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040878675] [2021-11-21 01:41:09,405 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:41:09,406 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:41:09,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:41:09,419 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:41:09,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-21 01:41:09,552 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-21 01:41:09,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:41:09,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-21 01:41:09,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:41:09,887 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-21 01:41:09,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:41:10,086 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-21 01:41:10,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040878675] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:41:10,086 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 01:41:10,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 7, 6, 7] total 13 [2021-11-21 01:41:10,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573495849] [2021-11-21 01:41:10,087 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 01:41:10,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-21 01:41:10,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:41:10,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-21 01:41:10,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-11-21 01:41:10,088 INFO L87 Difference]: Start difference. First operand 63 states and 77 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 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 01:41:10,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:41:10,485 INFO L93 Difference]: Finished difference Result 85 states and 102 transitions. [2021-11-21 01:41:10,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-21 01:41:10,500 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-11-21 01:41:10,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:41:10,501 INFO L225 Difference]: With dead ends: 85 [2021-11-21 01:41:10,501 INFO L226 Difference]: Without dead ends: 65 [2021-11-21 01:41:10,501 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 215 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-11-21 01:41:10,502 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 9 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 01:41:10,502 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 34 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 37 Invalid, 0 Unknown, 29 Unchecked, 0.4s Time] [2021-11-21 01:41:10,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-11-21 01:41:10,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 57. [2021-11-21 01:41:10,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.2321428571428572) internal successors, (69), 56 states have internal predecessors, (69), 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 01:41:10,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 69 transitions. [2021-11-21 01:41:10,512 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 69 transitions. Word has length 39 [2021-11-21 01:41:10,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:41:10,512 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 69 transitions. [2021-11-21 01:41:10,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 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 01:41:10,513 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 69 transitions. [2021-11-21 01:41:10,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-21 01:41:10,514 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:41:10,515 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:41:10,528 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2021-11-21 01:41:10,735 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-21 01:41:10,957 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-21 01:41:11,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:41:11,132 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:41:11,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:41:11,132 INFO L85 PathProgramCache]: Analyzing trace with hash -900679852, now seen corresponding path program 4 times [2021-11-21 01:41:11,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:41:11,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [517574403] [2021-11-21 01:41:11,133 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 01:41:11,133 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:41:11,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:41:11,134 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:41:11,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-21 01:41:11,253 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 01:41:11,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:41:11,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 01:41:11,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:41:11,418 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-21 01:41:11,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:41:11,550 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-21 01:41:11,551 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:41:11,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [517574403] [2021-11-21 01:41:11,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [517574403] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:41:11,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [228581047] [2021-11-21 01:41:11,551 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 01:41:11,552 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:41:11,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:41:11,555 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:41:11,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2021-11-21 01:41:11,610 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 01:41:11,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:41:11,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 01:41:11,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:41:11,721 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-21 01:41:11,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:41:11,816 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-21 01:41:11,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [228581047] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:41:11,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889682112] [2021-11-21 01:41:11,817 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 01:41:11,817 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:41:11,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:41:11,820 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:41:11,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-21 01:41:11,924 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 01:41:11,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:41:11,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 01:41:11,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:41:12,077 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-21 01:41:12,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:41:12,199 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-21 01:41:12,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889682112] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:41:12,200 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 01:41:12,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2021-11-21 01:41:12,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67546387] [2021-11-21 01:41:12,200 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 01:41:12,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-21 01:41:12,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:41:12,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-21 01:41:12,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:41:12,202 INFO L87 Difference]: Start difference. First operand 57 states and 69 transitions. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:41:12,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:41:12,750 INFO L93 Difference]: Finished difference Result 156 states and 192 transitions. [2021-11-21 01:41:12,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-21 01:41:12,751 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-11-21 01:41:12,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:41:12,752 INFO L225 Difference]: With dead ends: 156 [2021-11-21 01:41:12,752 INFO L226 Difference]: Without dead ends: 122 [2021-11-21 01:41:12,753 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-21 01:41:12,753 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 71 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 01:41:12,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 56 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 01:41:12,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-11-21 01:41:12,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 83. [2021-11-21 01:41:12,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.2560975609756098) internal successors, (103), 82 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:41:12,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 103 transitions. [2021-11-21 01:41:12,765 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 103 transitions. Word has length 42 [2021-11-21 01:41:12,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:41:12,766 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 103 transitions. [2021-11-21 01:41:12,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:41:12,766 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 103 transitions. [2021-11-21 01:41:12,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-21 01:41:12,767 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:41:12,767 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:41:12,811 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-21 01:41:13,005 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-21 01:41:13,190 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (25)] Ended with exit code 0 [2021-11-21 01:41:13,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt [2021-11-21 01:41:13,389 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:41:13,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:41:13,390 INFO L85 PathProgramCache]: Analyzing trace with hash 1156561688, now seen corresponding path program 5 times [2021-11-21 01:41:13,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:41:13,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1299611429] [2021-11-21 01:41:13,390 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-21 01:41:13,390 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:41:13,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:41:13,392 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:41:13,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-21 01:41:13,776 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-11-21 01:41:13,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:41:13,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-21 01:41:13,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:41:13,912 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 21 treesize of output 17 [2021-11-21 01:41:14,468 INFO L354 Elim1Store]: treesize reduction 67, result has 20.2 percent of original size [2021-11-21 01:41:14,468 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 39 treesize of output 38 [2021-11-21 01:41:16,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:41:28,809 WARN L227 SmtUtils]: Spent 12.29s on a formula simplification. DAG size of input: 37 DAG size of output: 32 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-21 01:41:28,813 INFO L354 Elim1Store]: treesize reduction 101, result has 46.0 percent of original size [2021-11-21 01:41:28,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 109 [2021-11-21 01:41:39,611 WARN L227 SmtUtils]: Spent 6.28s on a formula simplification that was a NOOP. DAG size: 53 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 01:41:50,726 WARN L227 SmtUtils]: Spent 6.34s on a formula simplification that was a NOOP. DAG size: 56 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 01:42:01,731 WARN L227 SmtUtils]: Spent 6.25s on a formula simplification that was a NOOP. DAG size: 56 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 01:42:01,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:42:01,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:42:01,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:42:01,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:42:01,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:42:01,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:42:01,795 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:42:01,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 70 treesize of output 69 [2021-11-21 01:42:07,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:42:07,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:42:07,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:42:07,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:42:07,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:42:07,163 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:42:07,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 57 treesize of output 20 [2021-11-21 01:42:07,814 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 10 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:42:07,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:45:17,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 120 [2021-11-21 01:45:26,650 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:45:26,650 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:45:26,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1299611429] [2021-11-21 01:45:26,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1299611429] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:45:26,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1891050807] [2021-11-21 01:45:26,650 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-21 01:45:26,650 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:45:26,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:45:26,652 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:45:26,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2021-11-21 01:45:26,785 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:45:26,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952194441] [2021-11-21 01:45:26,785 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-21 01:45:26,786 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:45:26,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:45:26,790 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 1 [2021-11-21 01:45:26,790 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:45:26,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9ac253b9-dc0c-4ace-a212-57e0b1b4f268/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-21 01:45:27,114 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-11-21 01:45:27,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:45:27,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-21 01:45:27,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:45:43,623 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 21 treesize of output 17 [2021-11-21 01:45:48,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:45:48,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 36 [2021-11-21 01:45:57,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:45:57,366 INFO L354 Elim1Store]: treesize reduction 130, result has 27.4 percent of original size [2021-11-21 01:45:57,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 59 treesize of output 72 [2021-11-21 01:46:02,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:46:02,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:46:02,281 INFO L354 Elim1Store]: treesize reduction 83, result has 22.4 percent of original size [2021-11-21 01:46:02,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 46 treesize of output 58 [2021-11-21 01:46:38,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:46:38,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:46:38,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:46:38,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:46:38,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:46:38,491 INFO L354 Elim1Store]: treesize reduction 171, result has 15.3 percent of original size [2021-11-21 01:46:38,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 2 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 79 treesize of output 52 [2021-11-21 01:46:47,672 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 4 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:46:47,672 INFO L328 TraceCheckSpWp]: Computing backward predicates...