./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_two_index_05.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6a47aea7 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf653d5b-8a70-41c0-9c53-27ee9e43f0cf/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf653d5b-8a70-41c0-9c53-27ee9e43f0cf/bin/utaipan-fb15Y9Yzbl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf653d5b-8a70-41c0-9c53-27ee9e43f0cf/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf653d5b-8a70-41c0-9c53-27ee9e43f0cf/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_two_index_05.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf653d5b-8a70-41c0-9c53-27ee9e43f0cf/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf653d5b-8a70-41c0-9c53-27ee9e43f0cf/bin/utaipan-fb15Y9Yzbl --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 3fc114fbbcfc36c9c941771d8fca06798b1529d5817554239fb5f8a03a84a489 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:31:37,306 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:31:37,308 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:31:37,364 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:31:37,365 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:31:37,371 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:31:37,375 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:31:37,381 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:31:37,385 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:31:37,394 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:31:37,395 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:31:37,397 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:31:37,398 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:31:37,401 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:31:37,405 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:31:37,411 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:31:37,414 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:31:37,415 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:31:37,418 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:31:37,427 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:31:37,431 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:31:37,433 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:31:37,437 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:31:37,439 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:31:37,446 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:31:37,447 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:31:37,447 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:31:37,450 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:31:37,451 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:31:37,453 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:31:37,454 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:31:37,455 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:31:37,458 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:31:37,460 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:31:37,462 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:31:37,462 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:31:37,463 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:31:37,464 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:31:37,464 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:31:37,465 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:31:37,467 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:31:37,468 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf653d5b-8a70-41c0-9c53-27ee9e43f0cf/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 17:31:37,528 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:31:37,528 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:31:37,529 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:31:37,529 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:31:37,531 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:31:37,538 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:31:37,539 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:31:37,539 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:31:37,539 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:31:37,540 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 17:31:37,541 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:31:37,542 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:31:37,542 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 17:31:37,542 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 17:31:37,542 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:31:37,543 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 17:31:37,543 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 17:31:37,543 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 17:31:37,544 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:31:37,545 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:31:37,545 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 17:31:37,545 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:31:37,546 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:31:37,546 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:31:37,546 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:31:37,546 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:31:37,549 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:31:37,549 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:31:37,550 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:31:37,550 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:31:37,550 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:31:37,551 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:31:37,551 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:31:37,551 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:31:37,552 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:31:37,552 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:31:37,552 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 17:31:37,553 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 17:31:37,553 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:31:37,553 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:31:37,553 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:31:37,554 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_cf653d5b-8a70-41c0-9c53-27ee9e43f0cf/bin/utaipan-fb15Y9Yzbl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf653d5b-8a70-41c0-9c53-27ee9e43f0cf/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3fc114fbbcfc36c9c941771d8fca06798b1529d5817554239fb5f8a03a84a489 [2021-11-23 17:31:37,896 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:31:37,924 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:31:37,928 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:31:37,930 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:31:37,931 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:31:37,933 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf653d5b-8a70-41c0-9c53-27ee9e43f0cf/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/array-examples/standard_two_index_05.i [2021-11-23 17:31:38,035 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf653d5b-8a70-41c0-9c53-27ee9e43f0cf/bin/utaipan-fb15Y9Yzbl/data/fa31667c8/c4dc0d77b2b34278bb01ab18da51bed9/FLAG02648bffb [2021-11-23 17:31:38,546 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:31:38,547 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf653d5b-8a70-41c0-9c53-27ee9e43f0cf/sv-benchmarks/c/array-examples/standard_two_index_05.i [2021-11-23 17:31:38,554 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf653d5b-8a70-41c0-9c53-27ee9e43f0cf/bin/utaipan-fb15Y9Yzbl/data/fa31667c8/c4dc0d77b2b34278bb01ab18da51bed9/FLAG02648bffb [2021-11-23 17:31:38,896 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf653d5b-8a70-41c0-9c53-27ee9e43f0cf/bin/utaipan-fb15Y9Yzbl/data/fa31667c8/c4dc0d77b2b34278bb01ab18da51bed9 [2021-11-23 17:31:38,899 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:31:38,901 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:31:38,903 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:31:38,904 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:31:38,912 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:31:38,913 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:31:38" (1/1) ... [2021-11-23 17:31:38,914 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33103800 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:31:38, skipping insertion in model container [2021-11-23 17:31:38,916 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:31:38" (1/1) ... [2021-11-23 17:31:38,926 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:31:38,955 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:31:39,150 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_cf653d5b-8a70-41c0-9c53-27ee9e43f0cf/sv-benchmarks/c/array-examples/standard_two_index_05.i[814,827] [2021-11-23 17:31:39,177 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:31:39,188 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:31:39,208 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_cf653d5b-8a70-41c0-9c53-27ee9e43f0cf/sv-benchmarks/c/array-examples/standard_two_index_05.i[814,827] [2021-11-23 17:31:39,228 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:31:39,251 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:31:39,252 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:31:39 WrapperNode [2021-11-23 17:31:39,252 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:31:39,253 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:31:39,254 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:31:39,254 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:31:39,264 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:31:39" (1/1) ... [2021-11-23 17:31:39,275 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:31:39" (1/1) ... [2021-11-23 17:31:39,305 INFO L137 Inliner]: procedures = 16, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 59 [2021-11-23 17:31:39,306 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:31:39,307 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:31:39,308 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:31:39,308 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:31:39,320 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:31:39" (1/1) ... [2021-11-23 17:31:39,320 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:31:39" (1/1) ... [2021-11-23 17:31:39,334 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:31:39" (1/1) ... [2021-11-23 17:31:39,335 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:31:39" (1/1) ... [2021-11-23 17:31:39,349 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:31:39" (1/1) ... [2021-11-23 17:31:39,360 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:31:39" (1/1) ... [2021-11-23 17:31:39,362 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:31:39" (1/1) ... [2021-11-23 17:31:39,370 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:31:39,371 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:31:39,372 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:31:39,372 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:31:39,373 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:31:39" (1/1) ... [2021-11-23 17:31:39,386 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:31:39,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf653d5b-8a70-41c0-9c53-27ee9e43f0cf/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:31:39,421 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf653d5b-8a70-41c0-9c53-27ee9e43f0cf/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:31:39,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf653d5b-8a70-41c0-9c53-27ee9e43f0cf/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:31:39,494 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:31:39,494 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 17:31:39,494 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 17:31:39,495 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 17:31:39,495 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:31:39,495 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:31:39,496 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 17:31:39,496 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 17:31:39,575 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:31:39,576 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:31:39,710 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:31:39,730 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder has thrown an exception: java.lang.UnsupportedOperationException: Set is immutable at de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.addAll(ImmutableSet.java:313) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaBuilder.addBranchEncoders(TransFormulaBuilder.java:170) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.parallelComposition(TransFormulaUtils.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.ParallelComposition.(ParallelComposition.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CodeBlockFactory.constructParallelComposition(CodeBlockFactory.java:109) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder$LargeBlockEncoding.composeParallel(CfgBuilder.java:1792) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder$LargeBlockEncoding.(CfgBuilder.java:1653) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder.createIcfg(CfgBuilder.java:280) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.RCFGBuilderObserver.process(RCFGBuilderObserver.java:88) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.DFSTreeWalker.runObserver(DFSTreeWalker.java:65) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.BaseWalker.runObserver(BaseWalker.java:93) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.BaseWalker.run(BaseWalker.java:86) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-23 17:31:39,736 INFO L158 Benchmark]: Toolchain (without parser) took 833.62ms. Allocated memory was 90.2MB in the beginning and 109.1MB in the end (delta: 18.9MB). Free memory was 52.9MB in the beginning and 71.9MB in the end (delta: -19.0MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 17:31:39,737 INFO L158 Benchmark]: CDTParser took 0.36ms. Allocated memory is still 90.2MB. Free memory is still 69.4MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 17:31:39,739 INFO L158 Benchmark]: CACSL2BoogieTranslator took 348.98ms. Allocated memory was 90.2MB in the beginning and 109.1MB in the end (delta: 18.9MB). Free memory was 52.8MB in the beginning and 84.9MB in the end (delta: -32.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-23 17:31:39,740 INFO L158 Benchmark]: Boogie Procedure Inliner took 53.21ms. Allocated memory is still 109.1MB. Free memory was 84.9MB in the beginning and 83.2MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 17:31:39,742 INFO L158 Benchmark]: Boogie Preprocessor took 62.95ms. Allocated memory is still 109.1MB. Free memory was 83.2MB in the beginning and 82.1MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 17:31:39,743 INFO L158 Benchmark]: RCFGBuilder took 362.51ms. Allocated memory is still 109.1MB. Free memory was 82.1MB in the beginning and 71.9MB in the end (delta: 10.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-23 17:31:39,749 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36ms. Allocated memory is still 90.2MB. Free memory is still 69.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 348.98ms. Allocated memory was 90.2MB in the beginning and 109.1MB in the end (delta: 18.9MB). Free memory was 52.8MB in the beginning and 84.9MB in the end (delta: -32.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 53.21ms. Allocated memory is still 109.1MB. Free memory was 84.9MB in the beginning and 83.2MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 62.95ms. Allocated memory is still 109.1MB. Free memory was 83.2MB in the beginning and 82.1MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 362.51ms. Allocated memory is still 109.1MB. Free memory was 82.1MB in the beginning and 71.9MB in the end (delta: 10.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: - ExceptionOrErrorResult: UnsupportedOperationException: Set is immutable de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: UnsupportedOperationException: Set is immutable: de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.addAll(ImmutableSet.java:313) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-23 17:31:39,789 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf653d5b-8a70-41c0-9c53-27ee9e43f0cf/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf653d5b-8a70-41c0-9c53-27ee9e43f0cf/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf653d5b-8a70-41c0-9c53-27ee9e43f0cf/bin/utaipan-fb15Y9Yzbl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf653d5b-8a70-41c0-9c53-27ee9e43f0cf/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf653d5b-8a70-41c0-9c53-27ee9e43f0cf/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_two_index_05.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf653d5b-8a70-41c0-9c53-27ee9e43f0cf/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf653d5b-8a70-41c0-9c53-27ee9e43f0cf/bin/utaipan-fb15Y9Yzbl --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 3fc114fbbcfc36c9c941771d8fca06798b1529d5817554239fb5f8a03a84a489 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:31:42,461 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:31:42,463 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:31:42,499 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:31:42,500 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:31:42,502 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:31:42,503 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:31:42,506 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:31:42,508 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:31:42,509 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:31:42,511 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:31:42,512 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:31:42,513 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:31:42,514 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:31:42,516 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:31:42,517 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:31:42,518 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:31:42,519 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:31:42,522 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:31:42,524 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:31:42,526 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:31:42,529 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:31:42,531 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:31:42,532 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:31:42,535 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:31:42,536 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:31:42,536 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:31:42,538 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:31:42,538 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:31:42,540 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:31:42,540 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:31:42,542 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:31:42,551 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:31:42,553 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:31:42,557 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:31:42,558 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:31:42,559 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:31:42,559 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:31:42,559 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:31:42,561 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:31:42,562 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:31:42,567 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf653d5b-8a70-41c0-9c53-27ee9e43f0cf/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-23 17:31:42,613 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:31:42,613 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:31:42,614 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:31:42,614 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:31:42,615 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:31:42,616 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:31:42,616 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:31:42,616 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:31:42,616 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:31:42,616 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:31:42,617 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:31:42,618 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:31:42,619 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:31:42,619 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:31:42,620 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:31:42,620 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:31:42,620 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:31:42,620 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:31:42,620 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:31:42,620 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 17:31:42,621 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 17:31:42,621 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 17:31:42,621 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:31:42,621 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:31:42,621 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:31:42,622 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:31:42,622 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:31:42,622 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 17:31:42,622 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:31:42,622 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:31:42,623 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:31:42,623 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:31:42,623 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:31:42,623 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 17:31:42,624 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 17:31:42,624 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:31:42,635 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:31:42,636 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:31:42,636 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_cf653d5b-8a70-41c0-9c53-27ee9e43f0cf/bin/utaipan-fb15Y9Yzbl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf653d5b-8a70-41c0-9c53-27ee9e43f0cf/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3fc114fbbcfc36c9c941771d8fca06798b1529d5817554239fb5f8a03a84a489 [2021-11-23 17:31:43,064 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:31:43,093 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:31:43,096 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:31:43,097 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:31:43,098 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:31:43,100 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf653d5b-8a70-41c0-9c53-27ee9e43f0cf/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/array-examples/standard_two_index_05.i [2021-11-23 17:31:43,176 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf653d5b-8a70-41c0-9c53-27ee9e43f0cf/bin/utaipan-fb15Y9Yzbl/data/8aa2dc683/ec196aa35ef1401297918e3c920b6d55/FLAG7e77d6fd6 [2021-11-23 17:31:43,767 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:31:43,768 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf653d5b-8a70-41c0-9c53-27ee9e43f0cf/sv-benchmarks/c/array-examples/standard_two_index_05.i [2021-11-23 17:31:43,775 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf653d5b-8a70-41c0-9c53-27ee9e43f0cf/bin/utaipan-fb15Y9Yzbl/data/8aa2dc683/ec196aa35ef1401297918e3c920b6d55/FLAG7e77d6fd6 [2021-11-23 17:31:44,127 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf653d5b-8a70-41c0-9c53-27ee9e43f0cf/bin/utaipan-fb15Y9Yzbl/data/8aa2dc683/ec196aa35ef1401297918e3c920b6d55 [2021-11-23 17:31:44,129 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:31:44,131 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:31:44,147 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:31:44,147 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:31:44,151 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:31:44,152 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:31:44" (1/1) ... [2021-11-23 17:31:44,153 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e702f9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:31:44, skipping insertion in model container [2021-11-23 17:31:44,153 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:31:44" (1/1) ... [2021-11-23 17:31:44,159 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:31:44,188 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:31:44,349 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_cf653d5b-8a70-41c0-9c53-27ee9e43f0cf/sv-benchmarks/c/array-examples/standard_two_index_05.i[814,827] [2021-11-23 17:31:44,364 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:31:44,397 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:31:44,431 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_cf653d5b-8a70-41c0-9c53-27ee9e43f0cf/sv-benchmarks/c/array-examples/standard_two_index_05.i[814,827] [2021-11-23 17:31:44,439 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:31:44,458 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:31:44,458 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:31:44 WrapperNode [2021-11-23 17:31:44,458 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:31:44,459 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:31:44,459 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:31:44,459 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:31:44,467 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:31:44" (1/1) ... [2021-11-23 17:31:44,477 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:31:44" (1/1) ... [2021-11-23 17:31:44,498 INFO L137 Inliner]: procedures = 18, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 58 [2021-11-23 17:31:44,498 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:31:44,499 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:31:44,499 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:31:44,499 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:31:44,509 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:31:44" (1/1) ... [2021-11-23 17:31:44,510 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:31:44" (1/1) ... [2021-11-23 17:31:44,512 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:31:44" (1/1) ... [2021-11-23 17:31:44,513 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:31:44" (1/1) ... [2021-11-23 17:31:44,520 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:31:44" (1/1) ... [2021-11-23 17:31:44,524 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:31:44" (1/1) ... [2021-11-23 17:31:44,526 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:31:44" (1/1) ... [2021-11-23 17:31:44,528 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:31:44,529 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:31:44,530 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:31:44,530 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:31:44,531 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:31:44" (1/1) ... [2021-11-23 17:31:44,538 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:31:44,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf653d5b-8a70-41c0-9c53-27ee9e43f0cf/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:31:44,569 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf653d5b-8a70-41c0-9c53-27ee9e43f0cf/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:31:44,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf653d5b-8a70-41c0-9c53-27ee9e43f0cf/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:31:44,625 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:31:44,625 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 17:31:44,626 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 17:31:44,626 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-23 17:31:44,626 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:31:44,626 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:31:44,626 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 17:31:44,626 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-23 17:31:44,717 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:31:44,719 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:31:44,923 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:31:44,929 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 17:31:44,929 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-23 17:31:44,931 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:31:44 BoogieIcfgContainer [2021-11-23 17:31:44,931 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 17:31:44,935 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 17:31:44,935 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 17:31:44,941 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 17:31:44,941 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 05:31:44" (1/3) ... [2021-11-23 17:31:44,942 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54cd59aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:31:44, skipping insertion in model container [2021-11-23 17:31:44,942 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:31:44" (2/3) ... [2021-11-23 17:31:44,955 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54cd59aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:31:44, skipping insertion in model container [2021-11-23 17:31:44,956 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:31:44" (3/3) ... [2021-11-23 17:31:44,957 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_two_index_05.i [2021-11-23 17:31:44,963 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 17:31:44,964 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 17:31:45,028 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 17:31:45,044 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 17:31:45,044 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 17:31:45,078 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:45,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-23 17:31:45,093 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:31:45,093 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:31:45,094 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:31:45,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:31:45,100 INFO L85 PathProgramCache]: Analyzing trace with hash -1157635880, now seen corresponding path program 1 times [2021-11-23 17:31:45,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:31:45,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1416849983] [2021-11-23 17:31:45,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:31:45,124 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:31:45,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf653d5b-8a70-41c0-9c53-27ee9e43f0cf/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:31:45,127 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf653d5b-8a70-41c0-9c53-27ee9e43f0cf/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:31:45,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf653d5b-8a70-41c0-9c53-27ee9e43f0cf/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 17:31:45,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:31:45,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:31:45,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:31:45,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:31:45,385 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:31:45,386 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:31:45,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1416849983] [2021-11-23 17:31:45,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1416849983] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:31:45,388 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:31:45,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:31:45,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626917427] [2021-11-23 17:31:45,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:31:45,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:31:45,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:31:45,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:31:45,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:31:45,441 INFO L87 Difference]: Start difference. First operand has 15 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:45,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:31:45,499 INFO L93 Difference]: Finished difference Result 28 states and 40 transitions. [2021-11-23 17:31:45,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:31:45,509 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-23 17:31:45,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:31:45,518 INFO L225 Difference]: With dead ends: 28 [2021-11-23 17:31:45,518 INFO L226 Difference]: Without dead ends: 12 [2021-11-23 17:31:45,521 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:31:45,527 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:31:45,531 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:31:45,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-11-23 17:31:45,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-11-23 17:31:45,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 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) [2021-11-23 17:31:45,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2021-11-23 17:31:45,567 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 9 [2021-11-23 17:31:45,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:31:45,568 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2021-11-23 17:31:45,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:45,569 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2021-11-23 17:31:45,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-23 17:31:45,571 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:31:45,571 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:31:45,588 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf653d5b-8a70-41c0-9c53-27ee9e43f0cf/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-23 17:31:45,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf653d5b-8a70-41c0-9c53-27ee9e43f0cf/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:31:45,784 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:31:45,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:31:45,789 INFO L85 PathProgramCache]: Analyzing trace with hash 722375763, now seen corresponding path program 1 times [2021-11-23 17:31:45,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:31:45,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1693101996] [2021-11-23 17:31:45,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:31:45,794 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:31:45,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf653d5b-8a70-41c0-9c53-27ee9e43f0cf/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:31:45,796 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf653d5b-8a70-41c0-9c53-27ee9e43f0cf/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:31:45,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf653d5b-8a70-41c0-9c53-27ee9e43f0cf/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 17:31:45,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:31:45,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:31:45,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:31:45,959 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:31:45,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:31:46,036 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:31:46,036 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:31:46,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1693101996] [2021-11-23 17:31:46,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1693101996] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:31:46,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [623385710] [2021-11-23 17:31:46,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:31:46,038 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:31:46,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf653d5b-8a70-41c0-9c53-27ee9e43f0cf/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:31:46,042 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf653d5b-8a70-41c0-9c53-27ee9e43f0cf/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:31:46,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf653d5b-8a70-41c0-9c53-27ee9e43f0cf/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2021-11-23 17:31:46,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:31:46,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:31:46,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:31:46,156 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:31:46,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:31:46,187 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:31:46,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [623385710] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:31:46,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477658178] [2021-11-23 17:31:46,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:31:46,188 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:31:46,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf653d5b-8a70-41c0-9c53-27ee9e43f0cf/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:31:46,211 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf653d5b-8a70-41c0-9c53-27ee9e43f0cf/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:31:46,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf653d5b-8a70-41c0-9c53-27ee9e43f0cf/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 17:31:46,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:31:46,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:31:46,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:31:46,329 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 17:31:46,329 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:31:46,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477658178] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:31:46,329 INFO L186 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2021-11-23 17:31:46,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4, 4, 4] total 6 [2021-11-23 17:31:46,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429019008] [2021-11-23 17:31:46,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:31:46,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:31:46,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:31:46,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:31:46,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-23 17:31:46,334 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:46,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:31:46,378 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2021-11-23 17:31:46,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:31:46,380 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-23 17:31:46,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:31:46,381 INFO L225 Difference]: With dead ends: 24 [2021-11-23 17:31:46,381 INFO L226 Difference]: Without dead ends: 18 [2021-11-23 17:31:46,382 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-23 17:31:46,384 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 4 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:31:46,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 14 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:31:46,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-23 17:31:46,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 13. [2021-11-23 17:31:46,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 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) [2021-11-23 17:31:46,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2021-11-23 17:31:46,390 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 10 [2021-11-23 17:31:46,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:31:46,391 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2021-11-23 17:31:46,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:46,392 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2021-11-23 17:31:46,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-23 17:31:46,392 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:31:46,393 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:31:46,433 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf653d5b-8a70-41c0-9c53-27ee9e43f0cf/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 17:31:46,612 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf653d5b-8a70-41c0-9c53-27ee9e43f0cf/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (4)] Forceful destruction successful, exit code 0 [2021-11-23 17:31:46,823 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf653d5b-8a70-41c0-9c53-27ee9e43f0cf/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-23 17:31:47,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf653d5b-8a70-41c0-9c53-27ee9e43f0cf/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf653d5b-8a70-41c0-9c53-27ee9e43f0cf/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf653d5b-8a70-41c0-9c53-27ee9e43f0cf/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:31:47,012 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:31:47,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:31:47,013 INFO L85 PathProgramCache]: Analyzing trace with hash 970258327, now seen corresponding path program 1 times [2021-11-23 17:31:47,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:31:47,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [186488] [2021-11-23 17:31:47,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:31:47,014 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:31:47,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf653d5b-8a70-41c0-9c53-27ee9e43f0cf/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:31:47,015 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf653d5b-8a70-41c0-9c53-27ee9e43f0cf/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:31:47,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf653d5b-8a70-41c0-9c53-27ee9e43f0cf/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-23 17:31:47,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:31:47,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:31:47,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:31:47,185 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 17:31:47,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:31:47,264 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 17:31:47,265 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:31:47,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [186488] [2021-11-23 17:31:47,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [186488] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:31:47,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1829028279] [2021-11-23 17:31:47,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:31:47,266 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:31:47,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf653d5b-8a70-41c0-9c53-27ee9e43f0cf/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:31:47,272 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf653d5b-8a70-41c0-9c53-27ee9e43f0cf/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:31:47,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf653d5b-8a70-41c0-9c53-27ee9e43f0cf/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-11-23 17:31:47,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:31:47,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:31:47,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:31:47,455 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 17:31:47,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:31:47,509 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 17:31:47,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1829028279] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:31:47,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761163378] [2021-11-23 17:31:47,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:31:47,511 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:31:47,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf653d5b-8a70-41c0-9c53-27ee9e43f0cf/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:31:47,512 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf653d5b-8a70-41c0-9c53-27ee9e43f0cf/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:31:47,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf653d5b-8a70-41c0-9c53-27ee9e43f0cf/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 17:31:47,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:31:47,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:31:47,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:31:47,608 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 17:31:47,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:31:47,638 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 17:31:47,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761163378] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:31:47,639 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:31:47,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 6 [2021-11-23 17:31:47,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650673925] [2021-11-23 17:31:47,640 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:31:47,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 17:31:47,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:31:47,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 17:31:47,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-23 17:31:47,643 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) 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) [2021-11-23 17:31:47,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:31:47,779 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2021-11-23 17:31:47,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 17:31:47,782 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) 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 [2021-11-23 17:31:47,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:31:47,783 INFO L225 Difference]: With dead ends: 36 [2021-11-23 17:31:47,784 INFO L226 Difference]: Without dead ends: 27 [2021-11-23 17:31:47,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:31:47,786 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 15 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:31:47,787 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 21 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 17:31:47,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-23 17:31:47,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 17. [2021-11-23 17:31:47,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:47,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-11-23 17:31:47,798 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2021-11-23 17:31:47,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:31:47,799 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-11-23 17:31:47,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) 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) [2021-11-23 17:31:47,800 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-11-23 17:31:47,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-23 17:31:47,801 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:31:47,801 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:31:47,808 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf653d5b-8a70-41c0-9c53-27ee9e43f0cf/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2021-11-23 17:31:48,028 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf653d5b-8a70-41c0-9c53-27ee9e43f0cf/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-23 17:31:48,216 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf653d5b-8a70-41c0-9c53-27ee9e43f0cf/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-11-23 17:31:48,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf653d5b-8a70-41c0-9c53-27ee9e43f0cf/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf653d5b-8a70-41c0-9c53-27ee9e43f0cf/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf653d5b-8a70-41c0-9c53-27ee9e43f0cf/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:31:48,405 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:31:48,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:31:48,406 INFO L85 PathProgramCache]: Analyzing trace with hash -1963781416, now seen corresponding path program 2 times [2021-11-23 17:31:48,407 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:31:48,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [80885724] [2021-11-23 17:31:48,408 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:31:48,408 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:31:48,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf653d5b-8a70-41c0-9c53-27ee9e43f0cf/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:31:48,413 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf653d5b-8a70-41c0-9c53-27ee9e43f0cf/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:31:48,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf653d5b-8a70-41c0-9c53-27ee9e43f0cf/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-23 17:31:48,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:31:48,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:31:48,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 17:31:48,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:31:48,584 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 17:31:48,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:31:48,751 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 17:31:48,751 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:31:48,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [80885724] [2021-11-23 17:31:48,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [80885724] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:31:48,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1175158322] [2021-11-23 17:31:48,752 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:31:48,752 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:31:48,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf653d5b-8a70-41c0-9c53-27ee9e43f0cf/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:31:48,754 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf653d5b-8a70-41c0-9c53-27ee9e43f0cf/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:31:48,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf653d5b-8a70-41c0-9c53-27ee9e43f0cf/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-23 17:31:48,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:31:48,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:31:48,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 17:31:48,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:31:49,015 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 17:31:49,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:31:49,062 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 17:31:49,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1175158322] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:31:49,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452843029] [2021-11-23 17:31:49,063 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:31:49,063 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:31:49,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf653d5b-8a70-41c0-9c53-27ee9e43f0cf/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:31:49,064 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf653d5b-8a70-41c0-9c53-27ee9e43f0cf/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:31:49,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf653d5b-8a70-41c0-9c53-27ee9e43f0cf/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-23 17:31:49,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:31:49,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:31:49,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:31:49,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:31:49,213 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 17:31:49,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:31:49,341 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 17:31:49,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452843029] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:31:49,342 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:31:49,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 5, 5] total 16 [2021-11-23 17:31:49,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366319877] [2021-11-23 17:31:49,342 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:31:49,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-23 17:31:49,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:31:49,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-23 17:31:49,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-11-23 17:31:49,345 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:50,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:31:50,212 INFO L93 Difference]: Finished difference Result 65 states and 80 transitions. [2021-11-23 17:31:50,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-23 17:31:50,213 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 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 15 [2021-11-23 17:31:50,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:31:50,215 INFO L225 Difference]: With dead ends: 65 [2021-11-23 17:31:50,215 INFO L226 Difference]: Without dead ends: 55 [2021-11-23 17:31:50,216 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=174, Invalid=288, Unknown=0, NotChecked=0, Total=462 [2021-11-23 17:31:50,218 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 128 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 17:31:50,219 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 95 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 17:31:50,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-11-23 17:31:50,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 29. [2021-11-23 17:31:50,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:50,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2021-11-23 17:31:50,229 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 15 [2021-11-23 17:31:50,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:31:50,230 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2021-11-23 17:31:50,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:50,230 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2021-11-23 17:31:50,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-23 17:31:50,231 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:31:50,232 INFO L514 BasicCegarLoop]: trace histogram [12, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:31:50,273 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf653d5b-8a70-41c0-9c53-27ee9e43f0cf/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-23 17:31:50,465 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf653d5b-8a70-41c0-9c53-27ee9e43f0cf/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-23 17:31:50,658 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf653d5b-8a70-41c0-9c53-27ee9e43f0cf/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-11-23 17:31:50,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf653d5b-8a70-41c0-9c53-27ee9e43f0cf/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf653d5b-8a70-41c0-9c53-27ee9e43f0cf/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf653d5b-8a70-41c0-9c53-27ee9e43f0cf/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:31:50,856 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:31:50,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:31:50,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1691862744, now seen corresponding path program 3 times [2021-11-23 17:31:50,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:31:50,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [690939866] [2021-11-23 17:31:50,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 17:31:50,858 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:31:50,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf653d5b-8a70-41c0-9c53-27ee9e43f0cf/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:31:50,860 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf653d5b-8a70-41c0-9c53-27ee9e43f0cf/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:31:50,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf653d5b-8a70-41c0-9c53-27ee9e43f0cf/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-23 17:31:51,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-23 17:31:51,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:31:51,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:31:51,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:31:51,221 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-11-23 17:31:51,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:31:51,494 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-11-23 17:31:51,495 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:31:51,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [690939866] [2021-11-23 17:31:51,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [690939866] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:31:51,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [637731469] [2021-11-23 17:31:51,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 17:31:51,496 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:31:51,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf653d5b-8a70-41c0-9c53-27ee9e43f0cf/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:31:51,499 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf653d5b-8a70-41c0-9c53-27ee9e43f0cf/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:31:51,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf653d5b-8a70-41c0-9c53-27ee9e43f0cf/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-23 17:31:52,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-23 17:31:52,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:31:52,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:31:52,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:31:52,101 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-11-23 17:31:52,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:31:52,166 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-11-23 17:31:52,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [637731469] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:31:52,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214961902] [2021-11-23 17:31:52,167 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 17:31:52,167 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:31:52,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf653d5b-8a70-41c0-9c53-27ee9e43f0cf/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:31:52,171 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf653d5b-8a70-41c0-9c53-27ee9e43f0cf/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:31:52,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf653d5b-8a70-41c0-9c53-27ee9e43f0cf/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-23 17:31:52,392 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-23 17:31:52,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:31:52,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:31:52,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:31:52,454 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-11-23 17:31:52,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:31:52,509 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-11-23 17:31:52,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214961902] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:31:52,510 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:31:52,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 16 [2021-11-23 17:31:52,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846045410] [2021-11-23 17:31:52,513 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:31:52,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-23 17:31:52,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:31:52,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-23 17:31:52,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-11-23 17:31:52,517 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 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) [2021-11-23 17:31:53,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:31:53,340 INFO L93 Difference]: Finished difference Result 109 states and 119 transitions. [2021-11-23 17:31:53,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-23 17:31:53,341 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 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 27 [2021-11-23 17:31:53,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:31:53,343 INFO L225 Difference]: With dead ends: 109 [2021-11-23 17:31:53,343 INFO L226 Difference]: Without dead ends: 103 [2021-11-23 17:31:53,344 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=174, Invalid=288, Unknown=0, NotChecked=0, Total=462 [2021-11-23 17:31:53,345 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 160 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 17:31:53,346 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 180 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-23 17:31:53,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-11-23 17:31:53,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 37. [2021-11-23 17:31:53,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 36 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:53,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2021-11-23 17:31:53,356 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 27 [2021-11-23 17:31:53,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:31:53,357 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2021-11-23 17:31:53,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 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) [2021-11-23 17:31:53,358 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2021-11-23 17:31:53,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-23 17:31:53,359 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:31:53,359 INFO L514 BasicCegarLoop]: trace histogram [14, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:31:53,400 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf653d5b-8a70-41c0-9c53-27ee9e43f0cf/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-23 17:31:53,598 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf653d5b-8a70-41c0-9c53-27ee9e43f0cf/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-11-23 17:31:53,789 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf653d5b-8a70-41c0-9c53-27ee9e43f0cf/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-11-23 17:31:53,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf653d5b-8a70-41c0-9c53-27ee9e43f0cf/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf653d5b-8a70-41c0-9c53-27ee9e43f0cf/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf653d5b-8a70-41c0-9c53-27ee9e43f0cf/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:31:53,988 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:31:53,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:31:53,988 INFO L85 PathProgramCache]: Analyzing trace with hash -7056424, now seen corresponding path program 4 times [2021-11-23 17:31:53,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:31:53,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [154647565] [2021-11-23 17:31:53,989 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 17:31:53,989 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:31:53,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf653d5b-8a70-41c0-9c53-27ee9e43f0cf/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:31:53,991 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf653d5b-8a70-41c0-9c53-27ee9e43f0cf/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:31:54,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf653d5b-8a70-41c0-9c53-27ee9e43f0cf/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-23 17:31:54,146 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 17:31:54,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:31:54,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-23 17:31:54,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:31:54,372 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-11-23 17:31:54,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:31:55,022 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-11-23 17:31:55,022 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:31:55,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [154647565] [2021-11-23 17:31:55,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [154647565] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:31:55,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [555474707] [2021-11-23 17:31:55,023 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 17:31:55,023 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:31:55,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf653d5b-8a70-41c0-9c53-27ee9e43f0cf/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:31:55,027 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf653d5b-8a70-41c0-9c53-27ee9e43f0cf/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:31:55,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf653d5b-8a70-41c0-9c53-27ee9e43f0cf/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-11-23 17:31:55,320 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 17:31:55,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:31:55,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-23 17:31:55,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:31:55,414 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-11-23 17:31:55,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:31:55,505 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-11-23 17:31:55,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [555474707] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:31:55,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780201413] [2021-11-23 17:31:55,506 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 17:31:55,506 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:31:55,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf653d5b-8a70-41c0-9c53-27ee9e43f0cf/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:31:55,507 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf653d5b-8a70-41c0-9c53-27ee9e43f0cf/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:31:55,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf653d5b-8a70-41c0-9c53-27ee9e43f0cf/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-23 17:31:55,656 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 17:31:55,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:31:55,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-23 17:31:55,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:31:55,750 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-11-23 17:31:55,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:31:55,856 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-11-23 17:31:55,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780201413] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:31:55,856 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:31:55,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15, 15, 15, 15] total 28 [2021-11-23 17:31:55,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486508699] [2021-11-23 17:31:55,857 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:31:55,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-23 17:31:55,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:31:55,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-23 17:31:55,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=534, Unknown=0, NotChecked=0, Total=756 [2021-11-23 17:31:55,859 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand has 28 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 28 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:58,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:31:58,370 INFO L93 Difference]: Finished difference Result 103 states and 120 transitions. [2021-11-23 17:31:58,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-23 17:31:58,372 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 28 states have internal predecessors, (36), 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 35 [2021-11-23 17:31:58,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:31:58,374 INFO L225 Difference]: With dead ends: 103 [2021-11-23 17:31:58,374 INFO L226 Difference]: Without dead ends: 81 [2021-11-23 17:31:58,375 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=558, Invalid=1002, Unknown=0, NotChecked=0, Total=1560 [2021-11-23 17:31:58,376 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 247 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-23 17:31:58,377 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 173 Invalid, 552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-23 17:31:58,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-11-23 17:31:58,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 51. [2021-11-23 17:31:58,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.06) internal successors, (53), 50 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:58,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2021-11-23 17:31:58,400 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 35 [2021-11-23 17:31:58,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:31:58,400 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2021-11-23 17:31:58,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 28 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:31:58,404 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2021-11-23 17:31:58,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-23 17:31:58,409 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:31:58,410 INFO L514 BasicCegarLoop]: trace histogram [26, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:31:58,434 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf653d5b-8a70-41c0-9c53-27ee9e43f0cf/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-23 17:31:58,655 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf653d5b-8a70-41c0-9c53-27ee9e43f0cf/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-23 17:31:58,830 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf653d5b-8a70-41c0-9c53-27ee9e43f0cf/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2021-11-23 17:31:59,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf653d5b-8a70-41c0-9c53-27ee9e43f0cf/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf653d5b-8a70-41c0-9c53-27ee9e43f0cf/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf653d5b-8a70-41c0-9c53-27ee9e43f0cf/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:31:59,028 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:31:59,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:31:59,029 INFO L85 PathProgramCache]: Analyzing trace with hash 676257656, now seen corresponding path program 5 times [2021-11-23 17:31:59,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:31:59,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2112102400] [2021-11-23 17:31:59,030 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 17:31:59,030 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:31:59,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf653d5b-8a70-41c0-9c53-27ee9e43f0cf/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:31:59,031 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf653d5b-8a70-41c0-9c53-27ee9e43f0cf/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:31:59,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf653d5b-8a70-41c0-9c53-27ee9e43f0cf/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-23 17:31:59,811 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-11-23 17:31:59,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:31:59,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-23 17:31:59,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:32:00,405 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-11-23 17:32:00,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:32:02,434 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-11-23 17:32:02,434 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:32:02,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2112102400] [2021-11-23 17:32:02,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2112102400] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:32:02,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [782361511] [2021-11-23 17:32:02,435 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 17:32:02,435 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:32:02,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf653d5b-8a70-41c0-9c53-27ee9e43f0cf/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:32:02,436 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf653d5b-8a70-41c0-9c53-27ee9e43f0cf/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:32:02,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf653d5b-8a70-41c0-9c53-27ee9e43f0cf/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process