./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/cstrpbrk-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 6a47aea7 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/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_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/cstrpbrk-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4f4570e8b350d1c6ecce62e4659f1c324ac9794563382f5f25c3525057748138 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 16:45:32,276 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 16:45:32,278 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 16:45:32,324 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 16:45:32,325 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 16:45:32,329 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 16:45:32,331 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 16:45:32,335 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 16:45:32,338 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 16:45:32,343 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 16:45:32,344 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 16:45:32,346 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 16:45:32,347 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 16:45:32,350 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 16:45:32,352 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 16:45:32,356 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 16:45:32,358 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 16:45:32,359 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 16:45:32,362 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 16:45:32,372 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 16:45:32,374 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 16:45:32,376 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 16:45:32,379 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 16:45:32,381 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 16:45:32,390 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 16:45:32,390 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 16:45:32,391 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 16:45:32,393 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 16:45:32,394 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 16:45:32,395 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 16:45:32,396 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 16:45:32,397 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 16:45:32,399 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 16:45:32,401 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 16:45:32,402 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 16:45:32,403 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 16:45:32,404 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 16:45:32,404 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 16:45:32,404 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 16:45:32,405 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 16:45:32,406 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 16:45:32,407 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-23 16:45:32,457 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 16:45:32,459 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 16:45:32,460 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 16:45:32,460 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 16:45:32,461 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 16:45:32,462 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 16:45:32,462 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 16:45:32,462 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 16:45:32,463 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 16:45:32,463 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 16:45:32,464 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 16:45:32,465 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 16:45:32,465 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 16:45:32,465 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 16:45:32,465 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 16:45:32,466 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 16:45:32,466 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 16:45:32,466 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 16:45:32,467 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 16:45:32,467 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 16:45:32,468 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 16:45:32,468 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 16:45:32,468 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-23 16:45:32,470 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 16:45:32,470 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 16:45:32,470 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 16:45:32,471 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-23 16:45:32,471 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-23 16:45:32,471 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-23 16:45:32,472 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 16:45:32,472 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 16:45:32,472 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 16:45:32,473 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 16:45:32,473 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 16:45:32,473 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 16:45:32,473 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:45:32,474 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 16:45:32,474 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 16:45:32,475 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 16:45:32,475 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 16:45:32,475 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 16:45:32,475 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 16:45:32,476 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_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4f4570e8b350d1c6ecce62e4659f1c324ac9794563382f5f25c3525057748138 [2021-11-23 16:45:32,731 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 16:45:32,751 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 16:45:32,754 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 16:45:32,755 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 16:45:32,755 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 16:45:32,757 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/array-memsafety/cstrpbrk-alloca-2.i [2021-11-23 16:45:32,833 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/data/b021d5df7/10a74c80c0bc49c3a4c497b43933f765/FLAG33fea2119 [2021-11-23 16:45:33,494 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 16:45:33,496 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/sv-benchmarks/c/array-memsafety/cstrpbrk-alloca-2.i [2021-11-23 16:45:33,519 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/data/b021d5df7/10a74c80c0bc49c3a4c497b43933f765/FLAG33fea2119 [2021-11-23 16:45:33,752 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/data/b021d5df7/10a74c80c0bc49c3a4c497b43933f765 [2021-11-23 16:45:33,754 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 16:45:33,756 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 16:45:33,760 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 16:45:33,760 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 16:45:33,763 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 16:45:33,764 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:45:33" (1/1) ... [2021-11-23 16:45:33,769 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79de2d85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:33, skipping insertion in model container [2021-11-23 16:45:33,769 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:45:33" (1/1) ... [2021-11-23 16:45:33,781 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 16:45:33,826 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 16:45:34,209 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:45:34,221 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 16:45:34,283 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:45:34,326 INFO L208 MainTranslator]: Completed translation [2021-11-23 16:45:34,327 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:34 WrapperNode [2021-11-23 16:45:34,327 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 16:45:34,329 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 16:45:34,329 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 16:45:34,329 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 16:45:34,337 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:34" (1/1) ... [2021-11-23 16:45:34,371 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:34" (1/1) ... [2021-11-23 16:45:34,411 INFO L137 Inliner]: procedures = 117, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 101 [2021-11-23 16:45:34,412 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 16:45:34,413 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 16:45:34,414 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 16:45:34,414 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 16:45:34,424 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:34" (1/1) ... [2021-11-23 16:45:34,425 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:34" (1/1) ... [2021-11-23 16:45:34,437 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:34" (1/1) ... [2021-11-23 16:45:34,439 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:34" (1/1) ... [2021-11-23 16:45:34,452 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:34" (1/1) ... [2021-11-23 16:45:34,464 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:34" (1/1) ... [2021-11-23 16:45:34,468 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:34" (1/1) ... [2021-11-23 16:45:34,479 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 16:45:34,480 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 16:45:34,480 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 16:45:34,480 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 16:45:34,482 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:34" (1/1) ... [2021-11-23 16:45:34,495 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:45:34,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:45:34,514 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 16:45:34,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 16:45:34,563 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 16:45:34,569 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 16:45:34,569 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 16:45:34,570 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 16:45:34,570 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 16:45:34,570 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 16:45:34,667 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 16:45:34,668 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 16:45:34,933 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 16:45:34,969 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 16:45:34,974 INFO L158 Benchmark]: Toolchain (without parser) took 1216.98ms. Allocated memory was 98.6MB in the beginning and 132.1MB in the end (delta: 33.6MB). Free memory was 63.4MB in the beginning and 82.8MB in the end (delta: -19.3MB). Peak memory consumption was 12.0MB. Max. memory is 16.1GB. [2021-11-23 16:45:34,975 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 98.6MB. Free memory is still 53.7MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 16:45:34,976 INFO L158 Benchmark]: CACSL2BoogieTranslator took 568.25ms. Allocated memory was 98.6MB in the beginning and 132.1MB in the end (delta: 33.6MB). Free memory was 63.2MB in the beginning and 101.0MB in the end (delta: -37.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-23 16:45:34,977 INFO L158 Benchmark]: Boogie Procedure Inliner took 83.88ms. Allocated memory is still 132.1MB. Free memory was 101.0MB in the beginning and 98.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 16:45:34,978 INFO L158 Benchmark]: Boogie Preprocessor took 66.07ms. Allocated memory is still 132.1MB. Free memory was 98.9MB in the beginning and 97.4MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 16:45:34,978 INFO L158 Benchmark]: RCFGBuilder took 492.16ms. Allocated memory is still 132.1MB. Free memory was 97.4MB in the beginning and 82.8MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-11-23 16:45:34,982 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26ms. Allocated memory is still 98.6MB. Free memory is still 53.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 568.25ms. Allocated memory was 98.6MB in the beginning and 132.1MB in the end (delta: 33.6MB). Free memory was 63.2MB in the beginning and 101.0MB in the end (delta: -37.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 83.88ms. Allocated memory is still 132.1MB. Free memory was 101.0MB in the beginning and 98.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 66.07ms. Allocated memory is still 132.1MB. Free memory was 98.9MB in the beginning and 97.4MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 492.16ms. Allocated memory is still 132.1MB. Free memory was 97.4MB in the beginning and 82.8MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. 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 16:45:35,035 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/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_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/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_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/cstrpbrk-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4f4570e8b350d1c6ecce62e4659f1c324ac9794563382f5f25c3525057748138 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 16:45:37,669 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 16:45:37,671 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 16:45:37,704 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 16:45:37,705 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 16:45:37,707 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 16:45:37,709 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 16:45:37,712 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 16:45:37,714 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 16:45:37,716 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 16:45:37,717 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 16:45:37,719 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 16:45:37,720 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 16:45:37,721 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 16:45:37,723 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 16:45:37,725 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 16:45:37,727 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 16:45:37,728 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 16:45:37,731 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 16:45:37,734 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 16:45:37,736 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 16:45:37,738 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 16:45:37,740 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 16:45:37,741 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 16:45:37,745 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 16:45:37,746 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 16:45:37,746 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 16:45:37,747 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 16:45:37,748 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 16:45:37,749 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 16:45:37,750 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 16:45:37,751 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 16:45:37,752 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 16:45:37,753 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 16:45:37,754 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 16:45:37,755 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 16:45:37,756 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 16:45:37,756 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 16:45:37,757 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 16:45:37,758 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 16:45:37,759 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 16:45:37,760 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-11-23 16:45:37,790 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 16:45:37,790 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 16:45:37,791 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 16:45:37,791 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 16:45:37,792 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 16:45:37,792 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 16:45:37,792 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 16:45:37,792 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 16:45:37,792 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 16:45:37,792 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 16:45:37,793 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 16:45:37,793 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 16:45:37,794 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 16:45:37,794 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 16:45:37,794 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 16:45:37,794 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 16:45:37,795 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-23 16:45:37,795 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 16:45:37,795 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 16:45:37,795 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 16:45:37,795 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-23 16:45:37,795 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-23 16:45:37,795 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-23 16:45:37,795 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 16:45:37,796 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 16:45:37,796 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 16:45:37,796 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 16:45:37,796 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 16:45:37,796 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 16:45:37,796 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 16:45:37,796 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 16:45:37,797 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 16:45:37,797 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:45:37,797 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 16:45:37,797 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 16:45:37,797 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 16:45:37,798 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 16:45:37,798 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 16:45:37,798 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 16:45:37,798 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_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4f4570e8b350d1c6ecce62e4659f1c324ac9794563382f5f25c3525057748138 [2021-11-23 16:45:38,262 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 16:45:38,292 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 16:45:38,295 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 16:45:38,297 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 16:45:38,298 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 16:45:38,300 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/array-memsafety/cstrpbrk-alloca-2.i [2021-11-23 16:45:38,378 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/data/a0367ea46/3715129da5cf4b07b45c116554e32d11/FLAG5ab7fbc27 [2021-11-23 16:45:39,085 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 16:45:39,086 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/sv-benchmarks/c/array-memsafety/cstrpbrk-alloca-2.i [2021-11-23 16:45:39,109 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/data/a0367ea46/3715129da5cf4b07b45c116554e32d11/FLAG5ab7fbc27 [2021-11-23 16:45:39,321 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/data/a0367ea46/3715129da5cf4b07b45c116554e32d11 [2021-11-23 16:45:39,325 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 16:45:39,326 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 16:45:39,328 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 16:45:39,329 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 16:45:39,344 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 16:45:39,345 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:45:39" (1/1) ... [2021-11-23 16:45:39,346 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7eee3580 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:39, skipping insertion in model container [2021-11-23 16:45:39,347 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:45:39" (1/1) ... [2021-11-23 16:45:39,359 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 16:45:39,400 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 16:45:39,830 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:45:39,842 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 16:45:39,884 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:45:39,928 INFO L208 MainTranslator]: Completed translation [2021-11-23 16:45:39,928 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:39 WrapperNode [2021-11-23 16:45:39,928 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 16:45:39,930 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 16:45:39,930 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 16:45:39,931 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 16:45:39,939 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:39" (1/1) ... [2021-11-23 16:45:39,976 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:39" (1/1) ... [2021-11-23 16:45:40,017 INFO L137 Inliner]: procedures = 118, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 98 [2021-11-23 16:45:40,017 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 16:45:40,019 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 16:45:40,019 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 16:45:40,019 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 16:45:40,029 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:39" (1/1) ... [2021-11-23 16:45:40,030 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:39" (1/1) ... [2021-11-23 16:45:40,047 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:39" (1/1) ... [2021-11-23 16:45:40,047 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:39" (1/1) ... [2021-11-23 16:45:40,056 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:39" (1/1) ... [2021-11-23 16:45:40,068 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:39" (1/1) ... [2021-11-23 16:45:40,077 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:39" (1/1) ... [2021-11-23 16:45:40,081 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 16:45:40,082 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 16:45:40,082 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 16:45:40,082 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 16:45:40,083 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:39" (1/1) ... [2021-11-23 16:45:40,099 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:45:40,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:45:40,128 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 16:45:40,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 16:45:40,183 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-23 16:45:40,183 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 16:45:40,186 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-23 16:45:40,186 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 16:45:40,188 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 16:45:40,189 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 16:45:40,340 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 16:45:40,342 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 16:45:40,763 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 16:45:40,770 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 16:45:40,770 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-23 16:45:40,772 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:45:40 BoogieIcfgContainer [2021-11-23 16:45:40,773 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 16:45:40,774 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 16:45:40,775 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 16:45:40,778 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 16:45:40,778 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 04:45:39" (1/3) ... [2021-11-23 16:45:40,779 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@544688d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 04:45:40, skipping insertion in model container [2021-11-23 16:45:40,779 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:39" (2/3) ... [2021-11-23 16:45:40,779 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@544688d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 04:45:40, skipping insertion in model container [2021-11-23 16:45:40,779 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:45:40" (3/3) ... [2021-11-23 16:45:40,781 INFO L111 eAbstractionObserver]: Analyzing ICFG cstrpbrk-alloca-2.i [2021-11-23 16:45:40,787 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 16:45:40,787 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 19 error locations. [2021-11-23 16:45:40,834 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 16:45:40,841 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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 16:45:40,841 INFO L340 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2021-11-23 16:45:40,867 INFO L276 IsEmpty]: Start isEmpty. Operand has 54 states, 34 states have (on average 1.911764705882353) internal successors, (65), 53 states have internal predecessors, (65), 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 16:45:40,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-23 16:45:40,879 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:45:40,879 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:45:40,880 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 16:45:40,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:45:40,890 INFO L85 PathProgramCache]: Analyzing trace with hash 1805029096, now seen corresponding path program 1 times [2021-11-23 16:45:40,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:45:40,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [798278417] [2021-11-23 16:45:40,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:45:40,905 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:45:40,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:45:40,911 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:45:40,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 16:45:41,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:45:41,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 16:45:41,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:41,133 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 16:45:41,134 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:45:41,135 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:45:41,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [798278417] [2021-11-23 16:45:41,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [798278417] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:45:41,136 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:45:41,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 16:45:41,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150812438] [2021-11-23 16:45:41,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:45:41,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 16:45:41,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:45:41,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 16:45:41,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 16:45:41,176 INFO L87 Difference]: Start difference. First operand has 54 states, 34 states have (on average 1.911764705882353) internal successors, (65), 53 states have internal predecessors, (65), 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 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:41,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:45:41,281 INFO L93 Difference]: Finished difference Result 100 states and 112 transitions. [2021-11-23 16:45:41,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 16:45:41,283 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-23 16:45:41,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:45:41,293 INFO L225 Difference]: With dead ends: 100 [2021-11-23 16:45:41,293 INFO L226 Difference]: Without dead ends: 96 [2021-11-23 16:45:41,295 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 16:45:41,299 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 50 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:45:41,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 160 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 16:45:41,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-11-23 16:45:41,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 55. [2021-11-23 16:45:41,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 36 states have (on average 1.75) internal successors, (63), 54 states have internal predecessors, (63), 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 16:45:41,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2021-11-23 16:45:41,338 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 7 [2021-11-23 16:45:41,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:45:41,338 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2021-11-23 16:45:41,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:41,339 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2021-11-23 16:45:41,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-23 16:45:41,339 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:45:41,340 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:45:41,355 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-23 16:45:41,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:45:41,551 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 16:45:41,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:45:41,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876138, now seen corresponding path program 1 times [2021-11-23 16:45:41,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:45:41,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1801643364] [2021-11-23 16:45:41,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:45:41,553 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:45:41,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:45:41,560 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:45:41,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 16:45:41,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:45:41,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 16:45:41,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:41,822 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-23 16:45:41,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2021-11-23 16:45:41,892 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 16:45:41,892 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:45:41,893 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:45:41,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1801643364] [2021-11-23 16:45:41,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1801643364] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:45:41,897 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:45:41,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 16:45:41,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046702948] [2021-11-23 16:45:41,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:45:41,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:45:41,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:45:41,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:45:41,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:45:41,905 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:41,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:45:41,912 INFO L93 Difference]: Finished difference Result 62 states and 76 transitions. [2021-11-23 16:45:41,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:45:41,912 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-23 16:45:41,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:45:41,914 INFO L225 Difference]: With dead ends: 62 [2021-11-23 16:45:41,914 INFO L226 Difference]: Without dead ends: 62 [2021-11-23 16:45:41,914 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 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 16:45:41,916 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 5 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:45:41,917 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 85 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 25 Unchecked, 0.0s Time] [2021-11-23 16:45:41,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-11-23 16:45:41,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 57. [2021-11-23 16:45:41,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 38 states have (on average 1.763157894736842) internal successors, (67), 56 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:41,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2021-11-23 16:45:41,925 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 7 [2021-11-23 16:45:41,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:45:41,926 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2021-11-23 16:45:41,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:41,926 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2021-11-23 16:45:41,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-23 16:45:41,927 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:45:41,927 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:45:41,941 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-23 16:45:42,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:45:42,140 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 16:45:42,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:45:42,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876139, now seen corresponding path program 1 times [2021-11-23 16:45:42,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:45:42,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1705872016] [2021-11-23 16:45:42,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:45:42,141 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:45:42,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:45:42,143 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:45:42,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-23 16:45:42,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:45:42,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-23 16:45:42,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:42,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:45:42,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-23 16:45:42,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2021-11-23 16:45:42,368 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 16:45:42,368 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:45:42,368 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:45:42,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1705872016] [2021-11-23 16:45:42,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1705872016] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:45:42,369 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:45:42,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 16:45:42,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422949649] [2021-11-23 16:45:42,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:45:42,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 16:45:42,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:45:42,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 16:45:42,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 16:45:42,372 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:42,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:45:42,718 INFO L93 Difference]: Finished difference Result 100 states and 113 transitions. [2021-11-23 16:45:42,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 16:45:42,719 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-23 16:45:42,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:45:42,721 INFO L225 Difference]: With dead ends: 100 [2021-11-23 16:45:42,721 INFO L226 Difference]: Without dead ends: 100 [2021-11-23 16:45:42,721 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:45:42,722 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 151 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 16:45:42,723 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 70 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 16:45:42,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-11-23 16:45:42,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 57. [2021-11-23 16:45:42,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 38 states have (on average 1.736842105263158) internal successors, (66), 56 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:42,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 66 transitions. [2021-11-23 16:45:42,740 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 66 transitions. Word has length 7 [2021-11-23 16:45:42,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:45:42,740 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 66 transitions. [2021-11-23 16:45:42,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:42,741 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 66 transitions. [2021-11-23 16:45:42,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-23 16:45:42,741 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:45:42,744 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:45:42,755 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-23 16:45:42,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:45:42,955 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 16:45:42,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:45:42,956 INFO L85 PathProgramCache]: Analyzing trace with hash -533876961, now seen corresponding path program 1 times [2021-11-23 16:45:42,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:45:42,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [107785428] [2021-11-23 16:45:42,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:45:42,957 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:45:42,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:45:42,958 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:45:42,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-23 16:45:43,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:45:43,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 16:45:43,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:43,145 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-23 16:45:43,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2021-11-23 16:45:43,250 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 16:45:43,251 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:45:43,251 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:45:43,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [107785428] [2021-11-23 16:45:43,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [107785428] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:45:43,251 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:45:43,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 16:45:43,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431741857] [2021-11-23 16:45:43,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:45:43,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:45:43,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:45:43,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:45:43,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:45:43,254 INFO L87 Difference]: Start difference. First operand 57 states and 66 transitions. Second operand has 3 states, 2 states have (on average 4.5) 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 16:45:43,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:45:43,262 INFO L93 Difference]: Finished difference Result 62 states and 74 transitions. [2021-11-23 16:45:43,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:45:43,262 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) 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 16:45:43,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:45:43,264 INFO L225 Difference]: With dead ends: 62 [2021-11-23 16:45:43,264 INFO L226 Difference]: Without dead ends: 62 [2021-11-23 16:45:43,264 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 16:45:43,269 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 3 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:45:43,271 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 87 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 25 Unchecked, 0.0s Time] [2021-11-23 16:45:43,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-11-23 16:45:43,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2021-11-23 16:45:43,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 59 states have internal predecessors, (71), 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 16:45:43,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 71 transitions. [2021-11-23 16:45:43,290 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 71 transitions. Word has length 9 [2021-11-23 16:45:43,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:45:43,290 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 71 transitions. [2021-11-23 16:45:43,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) 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 16:45:43,291 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 71 transitions. [2021-11-23 16:45:43,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-23 16:45:43,291 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:45:43,291 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:45:43,310 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-23 16:45:43,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:45:43,506 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 16:45:43,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:45:43,507 INFO L85 PathProgramCache]: Analyzing trace with hash -533876960, now seen corresponding path program 1 times [2021-11-23 16:45:43,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:45:43,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1777332753] [2021-11-23 16:45:43,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:45:43,508 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:45:43,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:45:43,509 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:45:43,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-23 16:45:43,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:45:43,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 16:45:43,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:43,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:45:43,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-23 16:45:43,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-11-23 16:45:43,712 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 16:45:43,713 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:45:43,713 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:45:43,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1777332753] [2021-11-23 16:45:43,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1777332753] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:45:43,714 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:45:43,714 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 16:45:43,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810937679] [2021-11-23 16:45:43,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:45:43,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 16:45:43,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:45:43,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 16:45:43,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 16:45:43,719 INFO L87 Difference]: Start difference. First operand 60 states and 71 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 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 16:45:43,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:45:43,920 INFO L93 Difference]: Finished difference Result 102 states and 118 transitions. [2021-11-23 16:45:43,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 16:45:43,921 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 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 16:45:43,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:45:43,923 INFO L225 Difference]: With dead ends: 102 [2021-11-23 16:45:43,923 INFO L226 Difference]: Without dead ends: 102 [2021-11-23 16:45:43,923 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 16:45:43,924 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 89 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 16:45:43,924 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 93 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 16:45:43,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-11-23 16:45:43,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 68. [2021-11-23 16:45:43,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 49 states have (on average 1.7142857142857142) internal successors, (84), 67 states have internal predecessors, (84), 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 16:45:43,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 84 transitions. [2021-11-23 16:45:43,931 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 84 transitions. Word has length 9 [2021-11-23 16:45:43,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:45:43,932 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 84 transitions. [2021-11-23 16:45:43,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 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 16:45:43,932 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 84 transitions. [2021-11-23 16:45:43,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-23 16:45:43,933 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:45:43,933 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:45:43,949 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-23 16:45:44,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:45:44,145 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 16:45:44,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:45:44,146 INFO L85 PathProgramCache]: Analyzing trace with hash -533876908, now seen corresponding path program 1 times [2021-11-23 16:45:44,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:45:44,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1759875282] [2021-11-23 16:45:44,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:45:44,147 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:45:44,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:45:44,148 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:45:44,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-23 16:45:44,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:45:44,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 16:45:44,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:44,248 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 16:45:44,249 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:45:44,249 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:45:44,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1759875282] [2021-11-23 16:45:44,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1759875282] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:45:44,249 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:45:44,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 16:45:44,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493606945] [2021-11-23 16:45:44,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:45:44,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 16:45:44,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:45:44,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 16:45:44,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 16:45:44,251 INFO L87 Difference]: Start difference. First operand 68 states and 84 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 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 16:45:44,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:45:44,318 INFO L93 Difference]: Finished difference Result 121 states and 143 transitions. [2021-11-23 16:45:44,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 16:45:44,323 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 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 16:45:44,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:45:44,324 INFO L225 Difference]: With dead ends: 121 [2021-11-23 16:45:44,325 INFO L226 Difference]: Without dead ends: 121 [2021-11-23 16:45:44,325 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 16:45:44,325 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 45 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:45:44,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 154 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 16:45:44,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-11-23 16:45:44,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 83. [2021-11-23 16:45:44,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 64 states have (on average 1.609375) internal successors, (103), 82 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:44,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 103 transitions. [2021-11-23 16:45:44,334 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 103 transitions. Word has length 9 [2021-11-23 16:45:44,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:45:44,334 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 103 transitions. [2021-11-23 16:45:44,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 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 16:45:44,335 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 103 transitions. [2021-11-23 16:45:44,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-23 16:45:44,335 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:45:44,335 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:45:44,347 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-23 16:45:44,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:45:44,546 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 16:45:44,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:45:44,547 INFO L85 PathProgramCache]: Analyzing trace with hash -476618606, now seen corresponding path program 1 times [2021-11-23 16:45:44,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:45:44,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [846867821] [2021-11-23 16:45:44,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:45:44,548 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:45:44,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:45:44,549 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:45:44,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-23 16:45:44,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:45:44,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 16:45:44,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:44,671 INFO L354 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-11-23 16:45:44,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 18 [2021-11-23 16:45:44,694 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 16:45:44,695 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:45:44,695 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:45:44,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [846867821] [2021-11-23 16:45:44,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [846867821] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:45:44,695 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:45:44,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 16:45:44,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696142497] [2021-11-23 16:45:44,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:45:44,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:45:44,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:45:44,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:45:44,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:45:44,699 INFO L87 Difference]: Start difference. First operand 83 states and 103 transitions. Second operand has 3 states, 2 states have (on average 4.5) 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 16:45:44,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:45:44,789 INFO L93 Difference]: Finished difference Result 81 states and 100 transitions. [2021-11-23 16:45:44,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:45:44,790 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) 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 16:45:44,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:45:44,791 INFO L225 Difference]: With dead ends: 81 [2021-11-23 16:45:44,791 INFO L226 Difference]: Without dead ends: 81 [2021-11-23 16:45:44,792 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 16:45:44,792 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 45 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:45:44,793 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 41 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 16:45:44,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-11-23 16:45:44,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2021-11-23 16:45:44,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 64 states have (on average 1.5625) internal successors, (100), 80 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:44,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 100 transitions. [2021-11-23 16:45:44,799 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 100 transitions. Word has length 9 [2021-11-23 16:45:44,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:45:44,800 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 100 transitions. [2021-11-23 16:45:44,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) 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 16:45:44,800 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 100 transitions. [2021-11-23 16:45:44,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-23 16:45:44,801 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:45:44,801 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:45:44,823 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-23 16:45:45,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:45:45,012 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 16:45:45,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:45:45,013 INFO L85 PathProgramCache]: Analyzing trace with hash -476618605, now seen corresponding path program 1 times [2021-11-23 16:45:45,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:45:45,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [7698820] [2021-11-23 16:45:45,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:45:45,014 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:45:45,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:45:45,015 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:45:45,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-23 16:45:45,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:45:45,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:45:45,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:45,120 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 16:45:45,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 16:45:45,188 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 16:45:45,188 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:45:45,189 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:45:45,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [7698820] [2021-11-23 16:45:45,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [7698820] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:45:45,189 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:45:45,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 16:45:45,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260613542] [2021-11-23 16:45:45,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:45:45,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 16:45:45,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:45:45,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 16:45:45,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:45:45,191 INFO L87 Difference]: Start difference. First operand 81 states and 100 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 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 16:45:45,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:45:45,472 INFO L93 Difference]: Finished difference Result 121 states and 144 transitions. [2021-11-23 16:45:45,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 16:45:45,473 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 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 16:45:45,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:45:45,475 INFO L225 Difference]: With dead ends: 121 [2021-11-23 16:45:45,475 INFO L226 Difference]: Without dead ends: 121 [2021-11-23 16:45:45,475 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-23 16:45:45,476 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 217 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 16:45:45,477 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 70 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 16:45:45,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-11-23 16:45:45,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 84. [2021-11-23 16:45:45,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 67 states have (on average 1.5522388059701493) internal successors, (104), 83 states have internal predecessors, (104), 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 16:45:45,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 104 transitions. [2021-11-23 16:45:45,485 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 104 transitions. Word has length 9 [2021-11-23 16:45:45,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:45:45,485 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 104 transitions. [2021-11-23 16:45:45,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 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 16:45:45,486 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 104 transitions. [2021-11-23 16:45:45,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-23 16:45:45,486 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:45:45,487 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:45:45,506 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-23 16:45:45,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:45:45,698 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 16:45:45,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:45:45,698 INFO L85 PathProgramCache]: Analyzing trace with hash 1241130402, now seen corresponding path program 1 times [2021-11-23 16:45:45,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:45:45,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [832588713] [2021-11-23 16:45:45,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:45:45,699 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:45:45,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:45:45,700 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:45:45,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-23 16:45:45,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:45:45,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 16:45:45,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:45,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:45:45,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-23 16:45:45,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-11-23 16:45:45,972 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 16:45:45,973 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:45:45,973 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:45:45,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [832588713] [2021-11-23 16:45:45,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [832588713] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:45:45,973 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:45:45,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 16:45:45,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580549578] [2021-11-23 16:45:45,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:45:45,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 16:45:45,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:45:45,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 16:45:45,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:45:45,975 INFO L87 Difference]: Start difference. First operand 84 states and 104 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 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 16:45:46,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:45:46,340 INFO L93 Difference]: Finished difference Result 126 states and 149 transitions. [2021-11-23 16:45:46,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 16:45:46,341 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 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 16:45:46,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:45:46,342 INFO L225 Difference]: With dead ends: 126 [2021-11-23 16:45:46,342 INFO L226 Difference]: Without dead ends: 126 [2021-11-23 16:45:46,342 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-23 16:45:46,343 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 184 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 16:45:46,343 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 91 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 16:45:46,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-11-23 16:45:46,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 79. [2021-11-23 16:45:46,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 62 states have (on average 1.564516129032258) internal successors, (97), 78 states have internal predecessors, (97), 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 16:45:46,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 97 transitions. [2021-11-23 16:45:46,350 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 97 transitions. Word has length 9 [2021-11-23 16:45:46,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:45:46,350 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 97 transitions. [2021-11-23 16:45:46,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 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 16:45:46,351 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 97 transitions. [2021-11-23 16:45:46,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-23 16:45:46,351 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:45:46,352 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:45:46,367 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-23 16:45:46,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:45:46,563 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 16:45:46,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:45:46,564 INFO L85 PathProgramCache]: Analyzing trace with hash 629683418, now seen corresponding path program 1 times [2021-11-23 16:45:46,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:45:46,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [150850674] [2021-11-23 16:45:46,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:45:46,564 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:45:46,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:45:46,565 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:45:46,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-23 16:45:46,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:45:46,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 16:45:46,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:46,686 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 16:45:46,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 16:45:46,763 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 16:45:46,763 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:45:46,763 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:45:46,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [150850674] [2021-11-23 16:45:46,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [150850674] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:45:46,764 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:45:46,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 16:45:46,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282560335] [2021-11-23 16:45:46,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:45:46,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 16:45:46,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:45:46,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 16:45:46,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 16:45:46,766 INFO L87 Difference]: Start difference. First operand 79 states and 97 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 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 16:45:46,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:45:46,961 INFO L93 Difference]: Finished difference Result 114 states and 133 transitions. [2021-11-23 16:45:46,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 16:45:46,962 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 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 16:45:46,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:45:46,963 INFO L225 Difference]: With dead ends: 114 [2021-11-23 16:45:46,963 INFO L226 Difference]: Without dead ends: 114 [2021-11-23 16:45:46,963 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 16:45:46,964 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 45 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 16:45:46,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 121 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 16:45:46,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-11-23 16:45:46,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 82. [2021-11-23 16:45:46,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 65 states have (on average 1.5692307692307692) internal successors, (102), 81 states have internal predecessors, (102), 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 16:45:46,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 102 transitions. [2021-11-23 16:45:46,971 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 102 transitions. Word has length 10 [2021-11-23 16:45:46,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:45:46,971 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 102 transitions. [2021-11-23 16:45:46,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 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 16:45:46,971 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 102 transitions. [2021-11-23 16:45:46,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-23 16:45:46,972 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:45:46,972 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:45:46,987 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-23 16:45:47,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:45:47,184 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 16:45:47,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:45:47,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1890276516, now seen corresponding path program 1 times [2021-11-23 16:45:47,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:45:47,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1183006150] [2021-11-23 16:45:47,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:45:47,185 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:45:47,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:45:47,186 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:45:47,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-23 16:45:47,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:45:47,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 16:45:47,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:47,302 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 16:45:47,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 16:45:47,542 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 16:45:47,542 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:45:47,542 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:45:47,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1183006150] [2021-11-23 16:45:47,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1183006150] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:45:47,543 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:45:47,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 16:45:47,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956066459] [2021-11-23 16:45:47,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:45:47,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 16:45:47,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:45:47,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 16:45:47,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-23 16:45:47,545 INFO L87 Difference]: Start difference. First operand 82 states and 102 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:47,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:45:47,849 INFO L93 Difference]: Finished difference Result 117 states and 140 transitions. [2021-11-23 16:45:47,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 16:45:47,850 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-23 16:45:47,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:45:47,851 INFO L225 Difference]: With dead ends: 117 [2021-11-23 16:45:47,851 INFO L226 Difference]: Without dead ends: 117 [2021-11-23 16:45:47,851 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-11-23 16:45:47,852 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 209 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 16:45:47,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 93 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 16:45:47,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-11-23 16:45:47,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 78. [2021-11-23 16:45:47,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 62 states have (on average 1.5483870967741935) internal successors, (96), 77 states have internal predecessors, (96), 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 16:45:47,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 96 transitions. [2021-11-23 16:45:47,859 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 96 transitions. Word has length 10 [2021-11-23 16:45:47,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:45:47,859 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 96 transitions. [2021-11-23 16:45:47,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:47,860 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 96 transitions. [2021-11-23 16:45:47,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-23 16:45:47,860 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:45:47,860 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:45:47,883 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-23 16:45:48,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:45:48,061 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 16:45:48,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:45:48,062 INFO L85 PathProgramCache]: Analyzing trace with hash -1226025171, now seen corresponding path program 1 times [2021-11-23 16:45:48,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:45:48,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [914449172] [2021-11-23 16:45:48,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:45:48,062 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:45:48,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:45:48,063 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:45:48,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-23 16:45:48,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:45:48,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:45:48,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:48,148 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:45:48,149 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:45:48,149 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:45:48,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [914449172] [2021-11-23 16:45:48,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [914449172] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:45:48,150 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:45:48,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 16:45:48,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155880537] [2021-11-23 16:45:48,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:45:48,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:45:48,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:45:48,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:45:48,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:45:48,152 INFO L87 Difference]: Start difference. First operand 78 states and 96 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:48,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:45:48,239 INFO L93 Difference]: Finished difference Result 76 states and 92 transitions. [2021-11-23 16:45:48,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:45:48,240 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-23 16:45:48,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:45:48,241 INFO L225 Difference]: With dead ends: 76 [2021-11-23 16:45:48,241 INFO L226 Difference]: Without dead ends: 76 [2021-11-23 16:45:48,241 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 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 16:45:48,242 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 41 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:45:48,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 40 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 16:45:48,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-11-23 16:45:48,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2021-11-23 16:45:48,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 61 states have (on average 1.4918032786885247) internal successors, (91), 74 states have internal predecessors, (91), 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 16:45:48,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 91 transitions. [2021-11-23 16:45:48,247 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 91 transitions. Word has length 11 [2021-11-23 16:45:48,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:45:48,247 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 91 transitions. [2021-11-23 16:45:48,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:48,248 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 91 transitions. [2021-11-23 16:45:48,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-23 16:45:48,249 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:45:48,249 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:45:48,263 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-23 16:45:48,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:45:48,460 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 16:45:48,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:45:48,460 INFO L85 PathProgramCache]: Analyzing trace with hash -1226025170, now seen corresponding path program 1 times [2021-11-23 16:45:48,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:45:48,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [200354385] [2021-11-23 16:45:48,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:45:48,461 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:45:48,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:45:48,462 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:45:48,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-23 16:45:48,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:45:48,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 16:45:48,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:48,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:45:48,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-23 16:45:48,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-11-23 16:45:48,828 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:45:48,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:45:49,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:45:49,750 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:45:49,750 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:45:49,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [200354385] [2021-11-23 16:45:49,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [200354385] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:45:49,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [306922913] [2021-11-23 16:45:49,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:45:49,753 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:45:49,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:45:49,763 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:45:49,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-23 16:45:49,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:45:49,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 16:45:49,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:49,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:45:49,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-23 16:45:49,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-11-23 16:45:50,130 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:45:50,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:45:50,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:45:50,872 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:45:50,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [306922913] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:45:50,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049615205] [2021-11-23 16:45:50,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:45:50,873 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:45:50,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:45:50,875 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:45:50,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-23 16:45:50,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:45:50,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-23 16:45:50,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:50,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:45:50,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-23 16:45:50,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-11-23 16:45:51,108 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:45:51,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:45:51,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:45:51,409 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:45:51,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049615205] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:45:51,410 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:45:51,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5, 5] total 15 [2021-11-23 16:45:51,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919703409] [2021-11-23 16:45:51,411 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:45:51,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-23 16:45:51,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:45:51,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-23 16:45:51,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-11-23 16:45:51,413 INFO L87 Difference]: Start difference. First operand 75 states and 91 transitions. Second operand has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:54,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:45:54,418 INFO L93 Difference]: Finished difference Result 251 states and 290 transitions. [2021-11-23 16:45:54,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 16:45:54,419 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-23 16:45:54,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:45:54,421 INFO L225 Difference]: With dead ends: 251 [2021-11-23 16:45:54,421 INFO L226 Difference]: Without dead ends: 251 [2021-11-23 16:45:54,421 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=152, Invalid=310, Unknown=0, NotChecked=0, Total=462 [2021-11-23 16:45:54,422 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 1082 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1082 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-23 16:45:54,422 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1082 Valid, 241 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-23 16:45:54,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-11-23 16:45:54,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 99. [2021-11-23 16:45:54,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 85 states have (on average 1.423529411764706) internal successors, (121), 98 states have internal predecessors, (121), 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 16:45:54,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 121 transitions. [2021-11-23 16:45:54,429 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 121 transitions. Word has length 11 [2021-11-23 16:45:54,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:45:54,429 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 121 transitions. [2021-11-23 16:45:54,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:54,429 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 121 transitions. [2021-11-23 16:45:54,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-23 16:45:54,430 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:45:54,430 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:45:54,444 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-11-23 16:45:54,642 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (15)] Ended with exit code 0 [2021-11-23 16:45:54,861 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-23 16:45:55,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:45:55,041 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 16:45:55,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:45:55,042 INFO L85 PathProgramCache]: Analyzing trace with hash -464624131, now seen corresponding path program 1 times [2021-11-23 16:45:55,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:45:55,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1133772702] [2021-11-23 16:45:55,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:45:55,042 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:45:55,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:45:55,043 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:45:55,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-23 16:45:55,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:45:55,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 16:45:55,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:55,140 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 16:45:55,140 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:45:55,140 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:45:55,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1133772702] [2021-11-23 16:45:55,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1133772702] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:45:55,141 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:45:55,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 16:45:55,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876183134] [2021-11-23 16:45:55,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:45:55,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 16:45:55,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:45:55,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 16:45:55,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 16:45:55,143 INFO L87 Difference]: Start difference. First operand 99 states and 121 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:55,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:45:55,241 INFO L93 Difference]: Finished difference Result 97 states and 119 transitions. [2021-11-23 16:45:55,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 16:45:55,242 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-23 16:45:55,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:45:55,243 INFO L225 Difference]: With dead ends: 97 [2021-11-23 16:45:55,243 INFO L226 Difference]: Without dead ends: 97 [2021-11-23 16:45:55,243 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:45:55,244 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 65 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:45:55,244 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 50 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 16:45:55,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-11-23 16:45:55,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2021-11-23 16:45:55,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 85 states have (on average 1.4) internal successors, (119), 96 states have internal predecessors, (119), 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 16:45:55,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 119 transitions. [2021-11-23 16:45:55,248 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 119 transitions. Word has length 12 [2021-11-23 16:45:55,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:45:55,249 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 119 transitions. [2021-11-23 16:45:55,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:55,249 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 119 transitions. [2021-11-23 16:45:55,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-23 16:45:55,250 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:45:55,250 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:45:55,263 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-11-23 16:45:55,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:45:55,459 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 16:45:55,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:45:55,460 INFO L85 PathProgramCache]: Analyzing trace with hash -464624130, now seen corresponding path program 1 times [2021-11-23 16:45:55,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:45:55,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1282807651] [2021-11-23 16:45:55,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:45:55,460 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:45:55,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:45:55,462 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:45:55,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-23 16:45:55,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:45:55,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-23 16:45:55,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:55,624 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 16:45:55,625 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:45:55,625 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:45:55,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1282807651] [2021-11-23 16:45:55,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1282807651] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:45:55,625 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:45:55,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 16:45:55,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523720156] [2021-11-23 16:45:55,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:45:55,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 16:45:55,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:45:55,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 16:45:55,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-23 16:45:55,627 INFO L87 Difference]: Start difference. First operand 97 states and 119 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:55,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:45:55,953 INFO L93 Difference]: Finished difference Result 158 states and 188 transitions. [2021-11-23 16:45:55,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 16:45:55,954 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-23 16:45:55,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:45:55,955 INFO L225 Difference]: With dead ends: 158 [2021-11-23 16:45:55,955 INFO L226 Difference]: Without dead ends: 158 [2021-11-23 16:45:55,955 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 16:45:55,956 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 214 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 16:45:55,957 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 159 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 16:45:55,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-11-23 16:45:55,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 112. [2021-11-23 16:45:55,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 100 states have (on average 1.38) internal successors, (138), 111 states have internal predecessors, (138), 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 16:45:55,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 138 transitions. [2021-11-23 16:45:55,961 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 138 transitions. Word has length 12 [2021-11-23 16:45:55,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:45:55,962 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 138 transitions. [2021-11-23 16:45:55,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:55,962 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 138 transitions. [2021-11-23 16:45:55,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-23 16:45:55,963 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:45:55,963 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:45:55,981 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-23 16:45:56,173 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:45:56,174 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 16:45:56,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:45:56,174 INFO L85 PathProgramCache]: Analyzing trace with hash -857651140, now seen corresponding path program 1 times [2021-11-23 16:45:56,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:45:56,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1256244907] [2021-11-23 16:45:56,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:45:56,174 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:45:56,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:45:56,175 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:45:56,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-23 16:45:56,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:45:56,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-23 16:45:56,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:56,366 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 16:45:56,366 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:45:56,366 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:45:56,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1256244907] [2021-11-23 16:45:56,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1256244907] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:45:56,366 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:45:56,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 16:45:56,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962836433] [2021-11-23 16:45:56,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:45:56,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 16:45:56,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:45:56,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 16:45:56,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-23 16:45:56,368 INFO L87 Difference]: Start difference. First operand 112 states and 138 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:56,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:45:56,415 INFO L93 Difference]: Finished difference Result 113 states and 139 transitions. [2021-11-23 16:45:56,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 16:45:56,416 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-23 16:45:56,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:45:56,416 INFO L225 Difference]: With dead ends: 113 [2021-11-23 16:45:56,417 INFO L226 Difference]: Without dead ends: 113 [2021-11-23 16:45:56,417 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-23 16:45:56,417 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 17 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:45:56,418 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 159 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 41 Unchecked, 0.0s Time] [2021-11-23 16:45:56,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-11-23 16:45:56,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2021-11-23 16:45:56,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 101 states have (on average 1.3762376237623761) internal successors, (139), 112 states have internal predecessors, (139), 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 16:45:56,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 139 transitions. [2021-11-23 16:45:56,422 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 139 transitions. Word has length 12 [2021-11-23 16:45:56,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:45:56,422 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 139 transitions. [2021-11-23 16:45:56,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:56,422 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 139 transitions. [2021-11-23 16:45:56,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-23 16:45:56,423 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:45:56,423 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:45:56,441 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-23 16:45:56,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:45:56,633 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 16:45:56,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:45:56,633 INFO L85 PathProgramCache]: Analyzing trace with hash -1862804906, now seen corresponding path program 1 times [2021-11-23 16:45:56,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:45:56,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [560403991] [2021-11-23 16:45:56,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:45:56,634 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:45:56,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:45:56,634 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:45:56,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-23 16:45:56,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:45:56,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 16:45:56,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:56,742 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 16:45:56,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 16:45:56,909 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:45:56,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:45:57,507 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:45:57,508 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:45:57,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [560403991] [2021-11-23 16:45:57,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [560403991] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:45:57,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [598668575] [2021-11-23 16:45:57,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:45:57,508 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:45:57,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:45:57,511 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:45:57,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-23 16:45:57,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:45:57,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 16:45:57,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:57,635 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 16:45:57,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 16:45:57,778 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:45:57,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:45:57,975 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:45:57,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [598668575] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:45:57,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143799864] [2021-11-23 16:45:57,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:45:57,975 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:45:57,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:45:57,976 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:45:57,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-23 16:45:58,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:45:58,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-23 16:45:58,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:58,080 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 16:45:58,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 16:45:58,244 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:45:58,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:45:59,262 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:45:59,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143799864] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:45:59,262 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:45:59,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6, 5, 6, 6] total 16 [2021-11-23 16:45:59,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844160158] [2021-11-23 16:45:59,263 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:45:59,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-23 16:45:59,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:45:59,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-23 16:45:59,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-11-23 16:45:59,264 INFO L87 Difference]: Start difference. First operand 113 states and 139 transitions. Second operand has 17 states, 16 states have (on average 2.3125) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:46:00,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:46:00,869 INFO L93 Difference]: Finished difference Result 204 states and 239 transitions. [2021-11-23 16:46:00,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-23 16:46:00,870 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.3125) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-23 16:46:00,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:46:00,872 INFO L225 Difference]: With dead ends: 204 [2021-11-23 16:46:00,872 INFO L226 Difference]: Without dead ends: 204 [2021-11-23 16:46:00,873 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=165, Invalid=341, Unknown=0, NotChecked=0, Total=506 [2021-11-23 16:46:00,873 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 507 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 507 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-23 16:46:00,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [507 Valid, 189 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-23 16:46:00,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-11-23 16:46:00,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 106. [2021-11-23 16:46:00,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 95 states have (on average 1.3368421052631578) internal successors, (127), 105 states have internal predecessors, (127), 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 16:46:00,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 127 transitions. [2021-11-23 16:46:00,887 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 127 transitions. Word has length 13 [2021-11-23 16:46:00,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:46:00,888 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 127 transitions. [2021-11-23 16:46:00,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.3125) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:46:00,888 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 127 transitions. [2021-11-23 16:46:00,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-23 16:46:00,889 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:46:00,889 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:46:00,928 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-23 16:46:01,117 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-23 16:46:01,312 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (21)] Ended with exit code 0 [2021-11-23 16:46:01,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 16:46:01,511 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 16:46:01,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:46:01,512 INFO L85 PathProgramCache]: Analyzing trace with hash 430975549, now seen corresponding path program 1 times [2021-11-23 16:46:01,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:46:01,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1205459907] [2021-11-23 16:46:01,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:46:01,512 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:46:01,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:46:01,513 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:46:01,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-23 16:46:01,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:46:01,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 16:46:01,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:46:01,627 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 16:46:01,627 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:46:01,627 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:46:01,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1205459907] [2021-11-23 16:46:01,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1205459907] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:46:01,628 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:46:01,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 16:46:01,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141985845] [2021-11-23 16:46:01,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:46:01,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 16:46:01,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:46:01,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 16:46:01,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:46:01,630 INFO L87 Difference]: Start difference. First operand 106 states and 127 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 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 16:46:01,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:46:01,770 INFO L93 Difference]: Finished difference Result 128 states and 152 transitions. [2021-11-23 16:46:01,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 16:46:01,770 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 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 14 [2021-11-23 16:46:01,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:46:01,771 INFO L225 Difference]: With dead ends: 128 [2021-11-23 16:46:01,771 INFO L226 Difference]: Without dead ends: 128 [2021-11-23 16:46:01,771 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-23 16:46:01,772 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 89 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:46:01,772 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 112 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 16:46:01,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-11-23 16:46:01,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 95. [2021-11-23 16:46:01,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 84 states have (on average 1.369047619047619) internal successors, (115), 94 states have internal predecessors, (115), 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 16:46:01,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 115 transitions. [2021-11-23 16:46:01,776 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 115 transitions. Word has length 14 [2021-11-23 16:46:01,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:46:01,776 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 115 transitions. [2021-11-23 16:46:01,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 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 16:46:01,777 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 115 transitions. [2021-11-23 16:46:01,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-23 16:46:01,777 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:46:01,777 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:46:01,788 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (23)] Ended with exit code 0 [2021-11-23 16:46:01,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:46:01,988 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 16:46:01,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:46:01,989 INFO L85 PathProgramCache]: Analyzing trace with hash -1433224404, now seen corresponding path program 1 times [2021-11-23 16:46:01,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:46:01,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1589708236] [2021-11-23 16:46:01,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:46:01,989 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:46:01,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:46:01,990 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:46:01,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-23 16:46:02,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:46:02,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 16:46:02,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:46:02,454 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 16:46:02,455 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:46:02,455 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:46:02,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1589708236] [2021-11-23 16:46:02,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1589708236] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:46:02,455 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:46:02,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 16:46:02,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399973682] [2021-11-23 16:46:02,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:46:02,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 16:46:02,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:46:02,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 16:46:02,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:46:02,457 INFO L87 Difference]: Start difference. First operand 95 states and 115 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:46:02,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:46:02,473 INFO L93 Difference]: Finished difference Result 109 states and 130 transitions. [2021-11-23 16:46:02,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 16:46:02,473 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-23 16:46:02,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:46:02,474 INFO L225 Difference]: With dead ends: 109 [2021-11-23 16:46:02,474 INFO L226 Difference]: Without dead ends: 106 [2021-11-23 16:46:02,474 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:46:02,475 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 5 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:46:02,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 141 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 26 Unchecked, 0.0s Time] [2021-11-23 16:46:02,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-11-23 16:46:02,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 104. [2021-11-23 16:46:02,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 93 states have (on average 1.3440860215053763) internal successors, (125), 103 states have internal predecessors, (125), 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 16:46:02,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 125 transitions. [2021-11-23 16:46:02,479 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 125 transitions. Word has length 16 [2021-11-23 16:46:02,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:46:02,479 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 125 transitions. [2021-11-23 16:46:02,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:46:02,480 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 125 transitions. [2021-11-23 16:46:02,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-23 16:46:02,480 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:46:02,480 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:46:02,492 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-23 16:46:02,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:46:02,691 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 16:46:02,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:46:02,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1433207485, now seen corresponding path program 1 times [2021-11-23 16:46:02,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:46:02,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2142645826] [2021-11-23 16:46:02,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:46:02,693 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:46:02,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:46:02,694 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:46:02,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-23 16:46:02,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:46:02,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 16:46:02,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:46:02,816 INFO L354 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-11-23 16:46:02,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 18 [2021-11-23 16:46:02,864 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 16:46:02,865 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:46:02,865 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:46:02,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2142645826] [2021-11-23 16:46:02,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2142645826] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:46:02,865 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:46:02,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 16:46:02,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457692619] [2021-11-23 16:46:02,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:46:02,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 16:46:02,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:46:02,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 16:46:02,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:46:02,867 INFO L87 Difference]: Start difference. First operand 104 states and 125 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:46:02,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:46:02,974 INFO L93 Difference]: Finished difference Result 103 states and 124 transitions. [2021-11-23 16:46:02,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 16:46:02,974 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-23 16:46:02,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:46:02,975 INFO L225 Difference]: With dead ends: 103 [2021-11-23 16:46:02,975 INFO L226 Difference]: Without dead ends: 103 [2021-11-23 16:46:02,975 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-23 16:46:02,976 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 73 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:46:02,976 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 70 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 16:46:02,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-11-23 16:46:02,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 101. [2021-11-23 16:46:02,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 93 states have (on average 1.3118279569892473) internal successors, (122), 100 states have internal predecessors, (122), 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 16:46:02,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 122 transitions. [2021-11-23 16:46:02,980 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 122 transitions. Word has length 16 [2021-11-23 16:46:02,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:46:02,980 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 122 transitions. [2021-11-23 16:46:02,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:46:02,980 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 122 transitions. [2021-11-23 16:46:02,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-23 16:46:02,981 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:46:02,981 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:46:02,990 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-23 16:46:03,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:46:03,187 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 16:46:03,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:46:03,187 INFO L85 PathProgramCache]: Analyzing trace with hash -1433207484, now seen corresponding path program 1 times [2021-11-23 16:46:03,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:46:03,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1969455879] [2021-11-23 16:46:03,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:46:03,190 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:46:03,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:46:03,191 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:46:03,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-23 16:46:03,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:46:03,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 16:46:03,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:46:03,290 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 16:46:03,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 16:46:03,370 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 16:46:03,370 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:46:03,370 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:46:03,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1969455879] [2021-11-23 16:46:03,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1969455879] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:46:03,371 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:46:03,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 16:46:03,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078016336] [2021-11-23 16:46:03,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:46:03,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 16:46:03,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:46:03,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 16:46:03,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 16:46:03,372 INFO L87 Difference]: Start difference. First operand 101 states and 122 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:46:03,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:46:03,595 INFO L93 Difference]: Finished difference Result 153 states and 180 transitions. [2021-11-23 16:46:03,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 16:46:03,596 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-23 16:46:03,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:46:03,597 INFO L225 Difference]: With dead ends: 153 [2021-11-23 16:46:03,597 INFO L226 Difference]: Without dead ends: 153 [2021-11-23 16:46:03,597 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-23 16:46:03,598 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 148 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 16:46:03,598 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 176 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 16:46:03,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-11-23 16:46:03,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 133. [2021-11-23 16:46:03,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 125 states have (on average 1.336) internal successors, (167), 132 states have internal predecessors, (167), 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 16:46:03,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 167 transitions. [2021-11-23 16:46:03,603 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 167 transitions. Word has length 16 [2021-11-23 16:46:03,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:46:03,603 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 167 transitions. [2021-11-23 16:46:03,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:46:03,604 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 167 transitions. [2021-11-23 16:46:03,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-23 16:46:03,604 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:46:03,605 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:46:03,612 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-23 16:46:03,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:46:03,811 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 16:46:03,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:46:03,811 INFO L85 PathProgramCache]: Analyzing trace with hash -2020013498, now seen corresponding path program 1 times [2021-11-23 16:46:03,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:46:03,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [725405979] [2021-11-23 16:46:03,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:46:03,812 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:46:03,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:46:03,813 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:46:03,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-23 16:46:03,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:46:03,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 16:46:03,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:46:03,923 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 16:46:03,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 16:46:04,018 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 16:46:04,018 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:46:04,018 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:46:04,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [725405979] [2021-11-23 16:46:04,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [725405979] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:46:04,019 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:46:04,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 16:46:04,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974373437] [2021-11-23 16:46:04,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:46:04,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 16:46:04,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:46:04,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 16:46:04,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 16:46:04,020 INFO L87 Difference]: Start difference. First operand 133 states and 167 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:46:04,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:46:04,232 INFO L93 Difference]: Finished difference Result 153 states and 193 transitions. [2021-11-23 16:46:04,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 16:46:04,232 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-23 16:46:04,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:46:04,233 INFO L225 Difference]: With dead ends: 153 [2021-11-23 16:46:04,234 INFO L226 Difference]: Without dead ends: 153 [2021-11-23 16:46:04,234 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-23 16:46:04,234 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 156 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 16:46:04,235 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 76 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 16:46:04,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-11-23 16:46:04,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 108. [2021-11-23 16:46:04,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 100 states have (on average 1.31) internal successors, (131), 107 states have internal predecessors, (131), 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 16:46:04,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 131 transitions. [2021-11-23 16:46:04,239 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 131 transitions. Word has length 16 [2021-11-23 16:46:04,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:46:04,239 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 131 transitions. [2021-11-23 16:46:04,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:46:04,239 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 131 transitions. [2021-11-23 16:46:04,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-23 16:46:04,240 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:46:04,240 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:46:04,249 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-23 16:46:04,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:46:04,447 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 16:46:04,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:46:04,447 INFO L85 PathProgramCache]: Analyzing trace with hash 1532417320, now seen corresponding path program 1 times [2021-11-23 16:46:04,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:46:04,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [335003532] [2021-11-23 16:46:04,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:46:04,448 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:46:04,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:46:04,448 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:46:04,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-23 16:46:04,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:46:04,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-23 16:46:04,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:46:04,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:46:04,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-23 16:46:04,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-11-23 16:46:04,856 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:46:04,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:46:06,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:46:06,079 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:46:06,080 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:46:06,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [335003532] [2021-11-23 16:46:06,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [335003532] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:46:06,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [643861676] [2021-11-23 16:46:06,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:46:06,080 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:46:06,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:46:06,081 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:46:06,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2021-11-23 16:46:06,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:46:06,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-23 16:46:06,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:46:06,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:46:06,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-23 16:46:06,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-11-23 16:46:06,586 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:46:06,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:46:07,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:46:07,425 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:46:07,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [643861676] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:46:07,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686751896] [2021-11-23 16:46:07,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:46:07,426 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:46:07,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:46:07,433 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:46:07,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-23 16:46:07,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:46:07,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-23 16:46:07,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:46:07,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:46:07,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-23 16:46:07,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-11-23 16:46:07,821 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:46:07,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:46:08,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:46:08,510 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:46:08,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686751896] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:46:08,510 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:46:08,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8, 8, 8, 8] total 16 [2021-11-23 16:46:08,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244664681] [2021-11-23 16:46:08,511 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:46:08,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-23 16:46:08,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:46:08,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-23 16:46:08,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2021-11-23 16:46:08,512 INFO L87 Difference]: Start difference. First operand 108 states and 131 transitions. Second operand has 17 states, 16 states have (on average 2.4375) internal successors, (39), 17 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 16:46:09,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:46:09,303 INFO L93 Difference]: Finished difference Result 222 states and 265 transitions. [2021-11-23 16:46:09,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 16:46:09,304 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.4375) internal successors, (39), 17 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) Word has length 17 [2021-11-23 16:46:09,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:46:09,306 INFO L225 Difference]: With dead ends: 222 [2021-11-23 16:46:09,306 INFO L226 Difference]: Without dead ends: 222 [2021-11-23 16:46:09,307 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 79 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=131, Invalid=211, Unknown=0, NotChecked=0, Total=342 [2021-11-23 16:46:09,307 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 583 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 583 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 16:46:09,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [583 Valid, 291 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-23 16:46:09,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-11-23 16:46:09,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 99. [2021-11-23 16:46:09,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 92 states have (on average 1.315217391304348) internal successors, (121), 98 states have internal predecessors, (121), 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 16:46:09,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 121 transitions. [2021-11-23 16:46:09,315 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 121 transitions. Word has length 17 [2021-11-23 16:46:09,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:46:09,316 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 121 transitions. [2021-11-23 16:46:09,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.4375) internal successors, (39), 17 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 16:46:09,316 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 121 transitions. [2021-11-23 16:46:09,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-23 16:46:09,317 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:46:09,317 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:46:09,322 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (29)] Forceful destruction successful, exit code 0 [2021-11-23 16:46:09,555 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-23 16:46:09,724 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (28)] Ended with exit code 0 [2021-11-23 16:46:09,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:46:09,918 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 16:46:09,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:46:09,918 INFO L85 PathProgramCache]: Analyzing trace with hash 43271131, now seen corresponding path program 1 times [2021-11-23 16:46:09,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:46:09,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1606214238] [2021-11-23 16:46:09,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:46:09,919 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:46:09,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:46:09,920 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:46:09,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-23 16:46:09,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:46:09,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:46:09,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:46:10,037 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:46:10,037 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:46:10,038 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:46:10,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1606214238] [2021-11-23 16:46:10,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1606214238] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:46:10,038 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:46:10,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 16:46:10,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709023708] [2021-11-23 16:46:10,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:46:10,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:46:10,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:46:10,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:46:10,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:46:10,040 INFO L87 Difference]: Start difference. First operand 99 states and 121 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 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 16:46:10,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:46:10,051 INFO L93 Difference]: Finished difference Result 101 states and 123 transitions. [2021-11-23 16:46:10,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:46:10,052 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 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 20 [2021-11-23 16:46:10,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:46:10,052 INFO L225 Difference]: With dead ends: 101 [2021-11-23 16:46:10,053 INFO L226 Difference]: Without dead ends: 101 [2021-11-23 16:46:10,053 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 18 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 16:46:10,055 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 0 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:46:10,056 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 86 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 16:46:10,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-11-23 16:46:10,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2021-11-23 16:46:10,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 94 states have (on average 1.3085106382978724) internal successors, (123), 100 states have internal predecessors, (123), 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 16:46:10,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 123 transitions. [2021-11-23 16:46:10,060 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 123 transitions. Word has length 20 [2021-11-23 16:46:10,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:46:10,061 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 123 transitions. [2021-11-23 16:46:10,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 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 16:46:10,061 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 123 transitions. [2021-11-23 16:46:10,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-23 16:46:10,061 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:46:10,062 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:46:10,075 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-11-23 16:46:10,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:46:10,273 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 16:46:10,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:46:10,273 INFO L85 PathProgramCache]: Analyzing trace with hash -1661772533, now seen corresponding path program 1 times [2021-11-23 16:46:10,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:46:10,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2115269946] [2021-11-23 16:46:10,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:46:10,274 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:46:10,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:46:10,275 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:46:10,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-23 16:46:10,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:46:10,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 16:46:10,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:46:10,822 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 16:46:10,822 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:46:10,822 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:46:10,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2115269946] [2021-11-23 16:46:10,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2115269946] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:46:10,823 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:46:10,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 16:46:10,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514446185] [2021-11-23 16:46:10,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:46:10,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 16:46:10,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:46:10,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 16:46:10,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:46:10,824 INFO L87 Difference]: Start difference. First operand 101 states and 123 transitions. Second operand has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 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 16:46:10,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:46:10,838 INFO L93 Difference]: Finished difference Result 114 states and 137 transitions. [2021-11-23 16:46:10,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 16:46:10,838 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 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 20 [2021-11-23 16:46:10,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:46:10,839 INFO L225 Difference]: With dead ends: 114 [2021-11-23 16:46:10,839 INFO L226 Difference]: Without dead ends: 111 [2021-11-23 16:46:10,839 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:46:10,840 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 4 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:46:10,840 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 105 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 14 Unchecked, 0.0s Time] [2021-11-23 16:46:10,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-11-23 16:46:10,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 104. [2021-11-23 16:46:10,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 97 states have (on average 1.2989690721649485) internal successors, (126), 103 states have internal predecessors, (126), 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 16:46:10,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 126 transitions. [2021-11-23 16:46:10,844 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 126 transitions. Word has length 20 [2021-11-23 16:46:10,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:46:10,844 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 126 transitions. [2021-11-23 16:46:10,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 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 16:46:10,845 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 126 transitions. [2021-11-23 16:46:10,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-23 16:46:10,845 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:46:10,846 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:46:10,856 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (32)] Ended with exit code 0 [2021-11-23 16:46:11,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:46:11,055 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 16:46:11,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:46:11,055 INFO L85 PathProgramCache]: Analyzing trace with hash -2029424505, now seen corresponding path program 1 times [2021-11-23 16:46:11,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:46:11,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1688257692] [2021-11-23 16:46:11,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:46:11,056 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:46:11,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:46:11,056 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:46:11,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-23 16:46:11,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:46:11,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 16:46:11,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:46:11,559 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 16:46:11,559 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:46:11,560 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:46:11,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1688257692] [2021-11-23 16:46:11,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1688257692] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:46:11,560 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:46:11,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 16:46:11,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840315394] [2021-11-23 16:46:11,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:46:11,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 16:46:11,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:46:11,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 16:46:11,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:46:11,562 INFO L87 Difference]: Start difference. First operand 104 states and 126 transitions. Second operand has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 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 16:46:11,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:46:11,581 INFO L93 Difference]: Finished difference Result 122 states and 146 transitions. [2021-11-23 16:46:11,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 16:46:11,582 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 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 20 [2021-11-23 16:46:11,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:46:11,582 INFO L225 Difference]: With dead ends: 122 [2021-11-23 16:46:11,582 INFO L226 Difference]: Without dead ends: 119 [2021-11-23 16:46:11,583 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:46:11,583 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 5 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:46:11,584 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 128 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 20 Unchecked, 0.0s Time] [2021-11-23 16:46:11,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-11-23 16:46:11,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 103. [2021-11-23 16:46:11,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 96 states have (on average 1.3125) internal successors, (126), 102 states have internal predecessors, (126), 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 16:46:11,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 126 transitions. [2021-11-23 16:46:11,588 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 126 transitions. Word has length 20 [2021-11-23 16:46:11,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:46:11,588 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 126 transitions. [2021-11-23 16:46:11,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 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 16:46:11,589 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 126 transitions. [2021-11-23 16:46:11,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-23 16:46:11,589 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:46:11,589 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:46:11,601 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (33)] Ended with exit code 0 [2021-11-23 16:46:11,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:46:11,801 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 16:46:11,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:46:11,801 INFO L85 PathProgramCache]: Analyzing trace with hash -1371974184, now seen corresponding path program 1 times [2021-11-23 16:46:11,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:46:11,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2038365246] [2021-11-23 16:46:11,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:46:11,802 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:46:11,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:46:11,803 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:46:11,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-11-23 16:46:11,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:46:11,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-23 16:46:11,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:46:11,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-11-23 16:46:12,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-11-23 16:46:12,063 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:46:12,063 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:46:12,063 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:46:12,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2038365246] [2021-11-23 16:46:12,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2038365246] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:46:12,064 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:46:12,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-23 16:46:12,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112073047] [2021-11-23 16:46:12,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:46:12,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 16:46:12,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:46:12,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 16:46:12,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-11-23 16:46:12,065 INFO L87 Difference]: Start difference. First operand 103 states and 126 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:46:12,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:46:12,336 INFO L93 Difference]: Finished difference Result 127 states and 150 transitions. [2021-11-23 16:46:12,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 16:46:12,337 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-23 16:46:12,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:46:12,338 INFO L225 Difference]: With dead ends: 127 [2021-11-23 16:46:12,338 INFO L226 Difference]: Without dead ends: 127 [2021-11-23 16:46:12,338 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-11-23 16:46:12,339 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 104 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 16:46:12,339 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 242 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 16:46:12,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-11-23 16:46:12,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 120. [2021-11-23 16:46:12,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 113 states have (on average 1.3008849557522124) internal successors, (147), 119 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:46:12,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 147 transitions. [2021-11-23 16:46:12,343 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 147 transitions. Word has length 22 [2021-11-23 16:46:12,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:46:12,344 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 147 transitions. [2021-11-23 16:46:12,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:46:12,344 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 147 transitions. [2021-11-23 16:46:12,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-23 16:46:12,345 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:46:12,345 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:46:12,371 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2021-11-23 16:46:12,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:46:12,557 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 16:46:12,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:46:12,557 INFO L85 PathProgramCache]: Analyzing trace with hash 1234049370, now seen corresponding path program 1 times [2021-11-23 16:46:12,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:46:12,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [367906329] [2021-11-23 16:46:12,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:46:12,558 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:46:12,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:46:12,558 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:46:12,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-11-23 16:46:12,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:46:12,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-23 16:46:12,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:46:12,687 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 16:46:12,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 16:46:12,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-23 16:46:12,920 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 16:46:12,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-11-23 16:46:13,375 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 16:46:13,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:46:14,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-11-23 16:46:14,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 27 [2021-11-23 16:46:14,446 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 16:46:14,447 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:46:14,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [367906329] [2021-11-23 16:46:14,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [367906329] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:46:14,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [559659574] [2021-11-23 16:46:14,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:46:14,447 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:46:14,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:46:14,451 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:46:14,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2021-11-23 16:46:14,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:46:14,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-23 16:46:14,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:46:14,626 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 16:46:14,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 16:46:14,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-23 16:46:15,403 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-11-23 16:46:15,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2021-11-23 16:46:15,439 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 16:46:15,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:46:15,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-11-23 16:46:15,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 27 [2021-11-23 16:46:16,231 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 16:46:16,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [559659574] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:46:16,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196578231] [2021-11-23 16:46:16,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:46:16,232 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:46:16,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:46:16,233 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:46:16,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-23 16:46:16,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:46:16,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-23 16:46:16,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:46:16,324 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 16:46:16,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 16:46:16,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-23 16:46:16,481 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 16:46:16,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-11-23 16:46:16,608 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 16:46:16,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:46:16,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-11-23 16:46:16,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 27 [2021-11-23 16:46:17,143 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 16:46:17,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196578231] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:46:17,144 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:46:17,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 11, 9, 10, 9] total 23 [2021-11-23 16:46:17,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283848759] [2021-11-23 16:46:17,145 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:46:17,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-23 16:46:17,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:46:17,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-23 16:46:17,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-11-23 16:46:17,146 INFO L87 Difference]: Start difference. First operand 120 states and 147 transitions. Second operand has 24 states, 23 states have (on average 2.260869565217391) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:46:20,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:46:20,042 INFO L93 Difference]: Finished difference Result 169 states and 201 transitions. [2021-11-23 16:46:20,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-23 16:46:20,044 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.260869565217391) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-23 16:46:20,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:46:20,045 INFO L225 Difference]: With dead ends: 169 [2021-11-23 16:46:20,045 INFO L226 Difference]: Without dead ends: 169 [2021-11-23 16:46:20,046 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 101 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=395, Invalid=1087, Unknown=0, NotChecked=0, Total=1482 [2021-11-23 16:46:20,047 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 468 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 468 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-23 16:46:20,047 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [468 Valid, 353 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 330 Invalid, 0 Unknown, 9 Unchecked, 0.8s Time] [2021-11-23 16:46:20,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-11-23 16:46:20,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 123. [2021-11-23 16:46:20,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 118 states have (on average 1.2881355932203389) internal successors, (152), 122 states have internal predecessors, (152), 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 16:46:20,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 152 transitions. [2021-11-23 16:46:20,052 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 152 transitions. Word has length 22 [2021-11-23 16:46:20,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:46:20,052 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 152 transitions. [2021-11-23 16:46:20,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.260869565217391) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:46:20,052 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 152 transitions. [2021-11-23 16:46:20,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-23 16:46:20,053 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:46:20,053 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:46:20,079 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2021-11-23 16:46:20,284 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-11-23 16:46:20,465 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (36)] Ended with exit code 0 [2021-11-23 16:46:20,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 16:46:20,665 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 16:46:20,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:46:20,665 INFO L85 PathProgramCache]: Analyzing trace with hash 598927193, now seen corresponding path program 1 times [2021-11-23 16:46:20,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:46:20,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [510503484] [2021-11-23 16:46:20,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:46:20,666 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:46:20,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:46:20,666 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:46:20,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-11-23 16:46:20,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:46:20,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-23 16:46:20,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:46:20,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-11-23 16:46:20,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-11-23 16:46:20,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 17 [2021-11-23 16:46:20,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-11-23 16:46:20,886 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 16:46:20,886 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:46:20,886 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:46:20,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [510503484] [2021-11-23 16:46:20,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [510503484] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:46:20,886 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:46:20,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 16:46:20,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649271507] [2021-11-23 16:46:20,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:46:20,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 16:46:20,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:46:20,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 16:46:20,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-23 16:46:20,888 INFO L87 Difference]: Start difference. First operand 123 states and 152 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:46:21,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:46:21,067 INFO L93 Difference]: Finished difference Result 140 states and 168 transitions. [2021-11-23 16:46:21,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 16:46:21,068 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-23 16:46:21,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:46:21,069 INFO L225 Difference]: With dead ends: 140 [2021-11-23 16:46:21,069 INFO L226 Difference]: Without dead ends: 118 [2021-11-23 16:46:21,069 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-11-23 16:46:21,070 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 24 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:46:21,070 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 174 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 16:46:21,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-11-23 16:46:21,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2021-11-23 16:46:21,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 113 states have (on average 1.2831858407079646) internal successors, (145), 117 states have internal predecessors, (145), 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 16:46:21,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 145 transitions. [2021-11-23 16:46:21,074 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 145 transitions. Word has length 23 [2021-11-23 16:46:21,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:46:21,074 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 145 transitions. [2021-11-23 16:46:21,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:46:21,075 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 145 transitions. [2021-11-23 16:46:21,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-23 16:46:21,075 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:46:21,075 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:46:21,088 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2021-11-23 16:46:21,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:46:21,276 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 16:46:21,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:46:21,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1021629019, now seen corresponding path program 1 times [2021-11-23 16:46:21,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:46:21,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1249290840] [2021-11-23 16:46:21,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:46:21,277 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:46:21,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:46:21,277 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:46:21,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2021-11-23 16:46:21,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:46:21,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-23 16:46:21,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:46:21,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-11-23 16:46:21,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-23 16:46:21,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-11-23 16:46:21,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:46:21,644 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 16:46:21,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 12 [2021-11-23 16:46:21,670 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 16:46:21,670 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:46:21,670 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:46:21,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1249290840] [2021-11-23 16:46:21,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1249290840] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:46:21,670 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:46:21,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-23 16:46:21,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688995796] [2021-11-23 16:46:21,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:46:21,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 16:46:21,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:46:21,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 16:46:21,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-11-23 16:46:21,671 INFO L87 Difference]: Start difference. First operand 118 states and 145 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:46:21,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:46:21,820 INFO L93 Difference]: Finished difference Result 130 states and 155 transitions. [2021-11-23 16:46:21,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 16:46:21,825 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-23 16:46:21,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:46:21,826 INFO L225 Difference]: With dead ends: 130 [2021-11-23 16:46:21,826 INFO L226 Difference]: Without dead ends: 113 [2021-11-23 16:46:21,827 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-11-23 16:46:21,828 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 42 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:46:21,828 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 187 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 31 Unchecked, 0.1s Time] [2021-11-23 16:46:21,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-11-23 16:46:21,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2021-11-23 16:46:21,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 108 states have (on average 1.2685185185185186) internal successors, (137), 112 states have internal predecessors, (137), 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 16:46:21,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 137 transitions. [2021-11-23 16:46:21,832 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 137 transitions. Word has length 23 [2021-11-23 16:46:21,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:46:21,832 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 137 transitions. [2021-11-23 16:46:21,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:46:21,833 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 137 transitions. [2021-11-23 16:46:21,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-23 16:46:21,833 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:46:21,834 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2021-11-23 16:46:21,848 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2021-11-23 16:46:22,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:46:22,045 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 16:46:22,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:46:22,045 INFO L85 PathProgramCache]: Analyzing trace with hash -591263241, now seen corresponding path program 2 times [2021-11-23 16:46:22,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:46:22,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [630864399] [2021-11-23 16:46:22,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 16:46:22,046 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:46:22,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:46:22,047 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:46:22,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2021-11-23 16:46:22,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 16:46:22,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:46:22,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-23 16:46:22,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:46:22,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:46:22,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-23 16:46:22,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-11-23 16:46:22,472 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:46:22,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:46:24,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:46:24,399 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:46:24,400 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:46:24,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [630864399] [2021-11-23 16:46:24,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [630864399] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:46:24,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2058410265] [2021-11-23 16:46:24,400 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 16:46:24,400 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:46:24,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:46:24,401 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:46:24,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2021-11-23 16:46:24,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 16:46:24,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:46:24,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-23 16:46:24,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:46:24,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:46:24,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-23 16:46:24,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-11-23 16:46:25,152 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:46:25,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:46:26,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:46:26,201 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:46:26,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2058410265] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:46:26,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870574989] [2021-11-23 16:46:26,202 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 16:46:26,203 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:46:26,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:46:26,203 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:46:26,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-11-23 16:46:26,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 16:46:26,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:46:26,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 16:46:26,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:46:26,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:46:26,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-23 16:46:26,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-11-23 16:46:26,740 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:46:26,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:46:29,098 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:46:29,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870574989] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:46:29,099 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:46:29,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 10, 9, 7, 8] total 33 [2021-11-23 16:46:29,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058082599] [2021-11-23 16:46:29,099 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:46:29,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-23 16:46:29,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:46:29,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-23 16:46:29,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=846, Unknown=0, NotChecked=0, Total=1122 [2021-11-23 16:46:29,101 INFO L87 Difference]: Start difference. First operand 113 states and 137 transitions. Second operand has 34 states, 33 states have (on average 2.9393939393939394) internal successors, (97), 34 states have internal predecessors, (97), 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 16:46:36,398 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 16:46:43,743 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 16:46:49,370 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 16:46:55,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:46:55,625 INFO L93 Difference]: Finished difference Result 791 states and 953 transitions. [2021-11-23 16:46:55,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-23 16:46:55,627 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.9393939393939394) internal successors, (97), 34 states have internal predecessors, (97), 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 23 [2021-11-23 16:46:55,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:46:55,631 INFO L225 Difference]: With dead ends: 791 [2021-11-23 16:46:55,631 INFO L226 Difference]: Without dead ends: 791 [2021-11-23 16:46:55,633 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 895 ImplicationChecksByTransitivity, 20.2s TimeCoverageRelationStatistics Valid=730, Invalid=2132, Unknown=0, NotChecked=0, Total=2862 [2021-11-23 16:46:55,633 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 2595 mSDsluCounter, 1008 mSDsCounter, 0 mSdLazyCounter, 874 mSolverCounterSat, 50 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2595 SdHoareTripleChecker+Valid, 1099 SdHoareTripleChecker+Invalid, 927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 874 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.8s IncrementalHoareTripleChecker+Time [2021-11-23 16:46:55,634 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2595 Valid, 1099 Invalid, 927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 874 Invalid, 3 Unknown, 0 Unchecked, 9.8s Time] [2021-11-23 16:46:55,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 791 states. [2021-11-23 16:46:55,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 791 to 161. [2021-11-23 16:46:55,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 156 states have (on average 1.2628205128205128) internal successors, (197), 160 states have internal predecessors, (197), 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 16:46:55,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 197 transitions. [2021-11-23 16:46:55,644 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 197 transitions. Word has length 23 [2021-11-23 16:46:55,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:46:55,644 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 197 transitions. [2021-11-23 16:46:55,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.9393939393939394) internal successors, (97), 34 states have internal predecessors, (97), 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 16:46:55,644 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 197 transitions. [2021-11-23 16:46:55,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-23 16:46:55,645 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:46:55,645 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:46:55,664 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (40)] Ended with exit code 0 [2021-11-23 16:46:55,876 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2021-11-23 16:46:56,058 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (41)] Forceful destruction successful, exit code 0 [2021-11-23 16:46:56,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 16:46:56,257 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 16:46:56,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:46:56,257 INFO L85 PathProgramCache]: Analyzing trace with hash -1041753114, now seen corresponding path program 1 times [2021-11-23 16:46:56,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:46:56,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [176838959] [2021-11-23 16:46:56,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:46:56,258 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:46:56,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:46:56,259 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:46:56,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2021-11-23 16:46:56,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:46:56,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 16:46:56,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:46:56,849 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 16:46:56,849 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:46:56,849 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:46:56,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [176838959] [2021-11-23 16:46:56,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [176838959] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:46:56,850 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:46:56,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 16:46:56,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788391290] [2021-11-23 16:46:56,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:46:56,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 16:46:56,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:46:56,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 16:46:56,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:46:56,851 INFO L87 Difference]: Start difference. First operand 161 states and 197 transitions. Second operand has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:46:56,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:46:56,868 INFO L93 Difference]: Finished difference Result 164 states and 199 transitions. [2021-11-23 16:46:56,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 16:46:56,869 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-23 16:46:56,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:46:56,870 INFO L225 Difference]: With dead ends: 164 [2021-11-23 16:46:56,870 INFO L226 Difference]: Without dead ends: 161 [2021-11-23 16:46:56,870 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:46:56,871 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 3 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:46:56,871 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 85 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 14 Unchecked, 0.0s Time] [2021-11-23 16:46:56,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-11-23 16:46:56,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 155. [2021-11-23 16:46:56,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 150 states have (on average 1.26) internal successors, (189), 154 states have internal predecessors, (189), 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 16:46:56,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 189 transitions. [2021-11-23 16:46:56,876 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 189 transitions. Word has length 24 [2021-11-23 16:46:56,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:46:56,876 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 189 transitions. [2021-11-23 16:46:56,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:46:56,877 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 189 transitions. [2021-11-23 16:46:56,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-23 16:46:56,877 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:46:56,877 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:46:56,893 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2021-11-23 16:46:57,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:46:57,089 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 16:46:57,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:46:57,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1740536418, now seen corresponding path program 1 times [2021-11-23 16:46:57,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:46:57,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [409343152] [2021-11-23 16:46:57,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:46:57,090 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:46:57,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:46:57,090 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:46:57,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2021-11-23 16:46:57,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:46:57,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 16:46:57,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:46:57,713 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 16:46:57,713 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:46:57,713 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:46:57,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [409343152] [2021-11-23 16:46:57,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [409343152] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:46:57,714 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:46:57,714 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 16:46:57,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554738379] [2021-11-23 16:46:57,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:46:57,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 16:46:57,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:46:57,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 16:46:57,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:46:57,715 INFO L87 Difference]: Start difference. First operand 155 states and 189 transitions. Second operand has 5 states, 4 states have (on average 6.75) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:46:57,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:46:57,724 INFO L93 Difference]: Finished difference Result 180 states and 217 transitions. [2021-11-23 16:46:57,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 16:46:57,725 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.75) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-23 16:46:57,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:46:57,726 INFO L225 Difference]: With dead ends: 180 [2021-11-23 16:46:57,726 INFO L226 Difference]: Without dead ends: 177 [2021-11-23 16:46:57,726 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:46:57,727 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 10 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:46:57,727 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 114 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 17 Unchecked, 0.0s Time] [2021-11-23 16:46:57,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-11-23 16:46:57,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 173. [2021-11-23 16:46:57,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 168 states have (on average 1.244047619047619) internal successors, (209), 172 states have internal predecessors, (209), 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 16:46:57,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 209 transitions. [2021-11-23 16:46:57,732 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 209 transitions. Word has length 27 [2021-11-23 16:46:57,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:46:57,732 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 209 transitions. [2021-11-23 16:46:57,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.75) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:46:57,733 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 209 transitions. [2021-11-23 16:46:57,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-23 16:46:57,733 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:46:57,734 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:46:57,745 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (44)] Ended with exit code 0 [2021-11-23 16:46:57,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:46:57,945 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 16:46:57,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:46:57,946 INFO L85 PathProgramCache]: Analyzing trace with hash -1740534735, now seen corresponding path program 1 times [2021-11-23 16:46:57,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:46:57,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [434041816] [2021-11-23 16:46:57,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:46:57,946 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:46:57,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:46:57,947 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:46:57,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2021-11-23 16:46:58,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:46:58,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 16:46:58,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:46:58,291 INFO L354 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2021-11-23 16:46:58,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 30 [2021-11-23 16:46:58,336 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:46:58,336 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:46:58,337 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:46:58,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [434041816] [2021-11-23 16:46:58,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [434041816] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:46:58,337 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:46:58,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-23 16:46:58,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102088324] [2021-11-23 16:46:58,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:46:58,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-23 16:46:58,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:46:58,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-23 16:46:58,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-11-23 16:46:58,338 INFO L87 Difference]: Start difference. First operand 173 states and 209 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:46:58,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:46:58,421 INFO L93 Difference]: Finished difference Result 168 states and 198 transitions. [2021-11-23 16:46:58,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 16:46:58,422 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-23 16:46:58,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:46:58,423 INFO L225 Difference]: With dead ends: 168 [2021-11-23 16:46:58,423 INFO L226 Difference]: Without dead ends: 150 [2021-11-23 16:46:58,423 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-23 16:46:58,423 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 2 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 78 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:46:58,424 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 199 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 78 Unchecked, 0.1s Time] [2021-11-23 16:46:58,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-11-23 16:46:58,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2021-11-23 16:46:58,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 145 states have (on average 1.1793103448275861) internal successors, (171), 149 states have internal predecessors, (171), 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 16:46:58,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 171 transitions. [2021-11-23 16:46:58,427 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 171 transitions. Word has length 27 [2021-11-23 16:46:58,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:46:58,427 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 171 transitions. [2021-11-23 16:46:58,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:46:58,427 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 171 transitions. [2021-11-23 16:46:58,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-23 16:46:58,428 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:46:58,428 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:46:58,439 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2021-11-23 16:46:58,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:46:58,638 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 16:46:58,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:46:58,639 INFO L85 PathProgramCache]: Analyzing trace with hash 825098111, now seen corresponding path program 1 times [2021-11-23 16:46:58,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:46:58,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [165700179] [2021-11-23 16:46:58,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:46:58,639 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:46:58,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:46:58,640 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:46:58,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2021-11-23 16:46:58,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:46:58,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 16:46:58,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:46:58,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-11-23 16:46:58,917 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 16:46:58,917 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:46:58,918 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:46:58,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [165700179] [2021-11-23 16:46:58,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [165700179] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:46:58,918 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:46:58,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 16:46:58,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260199626] [2021-11-23 16:46:58,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:46:58,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 16:46:58,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:46:58,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 16:46:58,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-23 16:46:58,919 INFO L87 Difference]: Start difference. First operand 150 states and 171 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:46:58,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:46:58,921 INFO L93 Difference]: Finished difference Result 152 states and 173 transitions. [2021-11-23 16:46:58,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 16:46:58,921 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-11-23 16:46:58,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:46:58,922 INFO L225 Difference]: With dead ends: 152 [2021-11-23 16:46:58,923 INFO L226 Difference]: Without dead ends: 152 [2021-11-23 16:46:58,923 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-23 16:46:58,923 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 2 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:46:58,924 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 86 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 19 Unchecked, 0.0s Time] [2021-11-23 16:46:58,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-11-23 16:46:58,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2021-11-23 16:46:58,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 147 states have (on average 1.1768707482993197) internal successors, (173), 151 states have internal predecessors, (173), 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 16:46:58,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 173 transitions. [2021-11-23 16:46:58,928 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 173 transitions. Word has length 29 [2021-11-23 16:46:58,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:46:58,928 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 173 transitions. [2021-11-23 16:46:58,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:46:58,928 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 173 transitions. [2021-11-23 16:46:58,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-23 16:46:58,929 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:46:58,929 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:46:58,946 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (46)] Forceful destruction successful, exit code 0 [2021-11-23 16:46:59,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:46:59,129 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 16:46:59,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:46:59,130 INFO L85 PathProgramCache]: Analyzing trace with hash 825099794, now seen corresponding path program 1 times [2021-11-23 16:46:59,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:46:59,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [530767670] [2021-11-23 16:46:59,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:46:59,130 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:46:59,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:46:59,131 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:46:59,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2021-11-23 16:46:59,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:46:59,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 16:46:59,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:46:59,701 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:46:59,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:47:00,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-11-23 16:47:00,352 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:47:00,352 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:47:00,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [530767670] [2021-11-23 16:47:00,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [530767670] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:47:00,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [577206966] [2021-11-23 16:47:00,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:47:00,353 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:47:00,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:47:00,359 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:47:00,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (48)] Waiting until timeout for monitored process [2021-11-23 16:47:00,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:47:00,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-23 16:47:00,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:47:01,103 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:47:01,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:47:01,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-11-23 16:47:01,755 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:47:01,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [577206966] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:47:01,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532546765] [2021-11-23 16:47:01,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:47:01,756 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:47:01,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:47:01,756 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:47:01,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-11-23 16:47:01,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:47:01,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-23 16:47:01,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:47:02,332 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:47:02,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:47:02,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-11-23 16:47:02,843 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:47:02,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532546765] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:47:02,844 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:47:02,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 9, 8, 8, 8] total 22 [2021-11-23 16:47:02,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941215616] [2021-11-23 16:47:02,845 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:47:02,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-23 16:47:02,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:47:02,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-23 16:47:02,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=398, Unknown=0, NotChecked=0, Total=506 [2021-11-23 16:47:02,847 INFO L87 Difference]: Start difference. First operand 152 states and 173 transitions. Second operand has 23 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 23 states have internal predecessors, (78), 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 16:47:03,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:47:03,243 INFO L93 Difference]: Finished difference Result 192 states and 223 transitions. [2021-11-23 16:47:03,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-23 16:47:03,245 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 23 states have internal predecessors, (78), 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 29 [2021-11-23 16:47:03,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:47:03,246 INFO L225 Difference]: With dead ends: 192 [2021-11-23 16:47:03,246 INFO L226 Difference]: Without dead ends: 192 [2021-11-23 16:47:03,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 145 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=149, Invalid=501, Unknown=0, NotChecked=0, Total=650 [2021-11-23 16:47:03,247 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 107 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 16:47:03,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 306 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 72 Invalid, 0 Unknown, 48 Unchecked, 0.2s Time] [2021-11-23 16:47:03,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-11-23 16:47:03,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 179. [2021-11-23 16:47:03,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 174 states have (on average 1.1954022988505748) internal successors, (208), 178 states have internal predecessors, (208), 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 16:47:03,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 208 transitions. [2021-11-23 16:47:03,252 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 208 transitions. Word has length 29 [2021-11-23 16:47:03,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:47:03,252 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 208 transitions. [2021-11-23 16:47:03,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 23 states have internal predecessors, (78), 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 16:47:03,253 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 208 transitions. [2021-11-23 16:47:03,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-23 16:47:03,253 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:47:03,253 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:47:03,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (48)] Forceful destruction successful, exit code 0 [2021-11-23 16:47:03,477 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2021-11-23 16:47:03,663 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (47)] Ended with exit code 0 [2021-11-23 16:47:03,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:47:03,857 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 16:47:03,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:47:03,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1648047469, now seen corresponding path program 1 times [2021-11-23 16:47:03,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:47:03,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [104689129] [2021-11-23 16:47:03,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:47:03,857 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:47:03,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:47:03,858 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:47:03,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2021-11-23 16:47:03,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:47:03,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 16:47:03,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:47:04,025 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:47:04,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:47:04,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-11-23 16:47:04,266 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:47:04,266 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:47:04,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [104689129] [2021-11-23 16:47:04,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [104689129] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:47:04,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [737978085] [2021-11-23 16:47:04,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:47:04,267 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:47:04,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:47:04,268 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:47:04,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (51)] Waiting until timeout for monitored process [2021-11-23 16:47:04,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:47:04,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 16:47:04,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:47:04,419 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 16:47:04,419 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:47:04,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [737978085] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:47:04,419 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 16:47:04,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5, 5] total 9 [2021-11-23 16:47:04,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966699360] [2021-11-23 16:47:04,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:47:04,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:47:04,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:47:04,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:47:04,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-23 16:47:04,421 INFO L87 Difference]: Start difference. First operand 179 states and 208 transitions. Second operand has 3 states, 2 states have (on average 15.5) internal successors, (31), 3 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 16:47:04,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:47:04,531 INFO L93 Difference]: Finished difference Result 178 states and 207 transitions. [2021-11-23 16:47:04,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:47:04,532 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 15.5) internal successors, (31), 3 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 31 [2021-11-23 16:47:04,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:47:04,533 INFO L225 Difference]: With dead ends: 178 [2021-11-23 16:47:04,533 INFO L226 Difference]: Without dead ends: 178 [2021-11-23 16:47:04,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-23 16:47:04,534 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 18 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:47:04,534 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 50 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 16:47:04,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-11-23 16:47:04,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2021-11-23 16:47:04,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 174 states have (on average 1.1896551724137931) internal successors, (207), 177 states have internal predecessors, (207), 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 16:47:04,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 207 transitions. [2021-11-23 16:47:04,539 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 207 transitions. Word has length 31 [2021-11-23 16:47:04,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:47:04,539 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 207 transitions. [2021-11-23 16:47:04,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 15.5) internal successors, (31), 3 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 16:47:04,539 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 207 transitions. [2021-11-23 16:47:04,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-23 16:47:04,540 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:47:04,540 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:47:04,555 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (50)] Forceful destruction successful, exit code 0 [2021-11-23 16:47:04,756 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (51)] Forceful destruction successful, exit code 0 [2021-11-23 16:47:04,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 16:47:04,951 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 16:47:04,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:47:04,952 INFO L85 PathProgramCache]: Analyzing trace with hash -47439521, now seen corresponding path program 1 times [2021-11-23 16:47:04,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:47:04,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [108141274] [2021-11-23 16:47:04,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:47:04,952 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:47:04,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:47:04,954 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:47:04,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2021-11-23 16:47:05,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:47:05,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 16:47:05,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:47:05,673 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 16:47:05,673 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:47:05,673 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:47:05,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [108141274] [2021-11-23 16:47:05,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [108141274] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:47:05,674 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:47:05,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 16:47:05,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800650231] [2021-11-23 16:47:05,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:47:05,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 16:47:05,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:47:05,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 16:47:05,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:47:05,675 INFO L87 Difference]: Start difference. First operand 178 states and 207 transitions. Second operand has 5 states, 4 states have (on average 7.75) internal successors, (31), 5 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 16:47:05,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:47:05,691 INFO L93 Difference]: Finished difference Result 183 states and 211 transitions. [2021-11-23 16:47:05,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 16:47:05,692 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.75) internal successors, (31), 5 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 31 [2021-11-23 16:47:05,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:47:05,693 INFO L225 Difference]: With dead ends: 183 [2021-11-23 16:47:05,693 INFO L226 Difference]: Without dead ends: 178 [2021-11-23 16:47:05,693 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:47:05,694 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 3 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:47:05,694 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 82 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 16 Unchecked, 0.0s Time] [2021-11-23 16:47:05,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-11-23 16:47:05,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 167. [2021-11-23 16:47:05,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 163 states have (on average 1.1901840490797546) internal successors, (194), 166 states have internal predecessors, (194), 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 16:47:05,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 194 transitions. [2021-11-23 16:47:05,699 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 194 transitions. Word has length 31 [2021-11-23 16:47:05,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:47:05,699 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 194 transitions. [2021-11-23 16:47:05,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.75) internal successors, (31), 5 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 16:47:05,699 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 194 transitions. [2021-11-23 16:47:05,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-23 16:47:05,700 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:47:05,700 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:47:05,713 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (52)] Ended with exit code 0 [2021-11-23 16:47:05,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:47:05,912 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 16:47:05,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:47:05,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1069297984, now seen corresponding path program 1 times [2021-11-23 16:47:05,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:47:05,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1062435383] [2021-11-23 16:47:05,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:47:05,913 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:47:05,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:47:05,913 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:47:05,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2021-11-23 16:47:06,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:47:06,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-23 16:47:06,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:47:06,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-23 16:47:06,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:47:06,280 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 16:47:06,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 12 [2021-11-23 16:47:06,337 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:47:06,338 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:47:06,338 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:47:06,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1062435383] [2021-11-23 16:47:06,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1062435383] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:47:06,338 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:47:06,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-23 16:47:06,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523563386] [2021-11-23 16:47:06,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:47:06,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-23 16:47:06,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:47:06,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-23 16:47:06,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-23 16:47:06,340 INFO L87 Difference]: Start difference. First operand 167 states and 194 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 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 16:47:06,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:47:06,455 INFO L93 Difference]: Finished difference Result 181 states and 208 transitions. [2021-11-23 16:47:06,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 16:47:06,456 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 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 33 [2021-11-23 16:47:06,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:47:06,457 INFO L225 Difference]: With dead ends: 181 [2021-11-23 16:47:06,457 INFO L226 Difference]: Without dead ends: 171 [2021-11-23 16:47:06,457 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-11-23 16:47:06,458 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 29 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:47:06,458 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 219 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 50 Invalid, 0 Unknown, 44 Unchecked, 0.1s Time] [2021-11-23 16:47:06,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-11-23 16:47:06,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 168. [2021-11-23 16:47:06,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 164 states have (on average 1.1890243902439024) internal successors, (195), 167 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:47:06,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 195 transitions. [2021-11-23 16:47:06,463 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 195 transitions. Word has length 33 [2021-11-23 16:47:06,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:47:06,463 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 195 transitions. [2021-11-23 16:47:06,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 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 16:47:06,463 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 195 transitions. [2021-11-23 16:47:06,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-23 16:47:06,464 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:47:06,464 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:47:06,478 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (53)] Forceful destruction successful, exit code 0 [2021-11-23 16:47:06,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:47:06,675 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 16:47:06,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:47:06,676 INFO L85 PathProgramCache]: Analyzing trace with hash 322953475, now seen corresponding path program 1 times [2021-11-23 16:47:06,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:47:06,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [393294991] [2021-11-23 16:47:06,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:47:06,676 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:47:06,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:47:06,678 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:47:06,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2021-11-23 16:47:06,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:47:06,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 16:47:06,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:47:07,534 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 16:47:07,534 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:47:07,534 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:47:07,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [393294991] [2021-11-23 16:47:07,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [393294991] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:47:07,535 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:47:07,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 16:47:07,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086093917] [2021-11-23 16:47:07,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:47:07,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 16:47:07,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:47:07,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 16:47:07,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:47:07,538 INFO L87 Difference]: Start difference. First operand 168 states and 195 transitions. Second operand has 5 states, 4 states have (on average 9.0) internal successors, (36), 5 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 16:47:07,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:47:07,548 INFO L93 Difference]: Finished difference Result 167 states and 194 transitions. [2021-11-23 16:47:07,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 16:47:07,549 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 9.0) internal successors, (36), 5 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 37 [2021-11-23 16:47:07,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:47:07,549 INFO L225 Difference]: With dead ends: 167 [2021-11-23 16:47:07,550 INFO L226 Difference]: Without dead ends: 161 [2021-11-23 16:47:07,550 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:47:07,550 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 7 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:47:07,550 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 63 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 13 Unchecked, 0.0s Time] [2021-11-23 16:47:07,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-11-23 16:47:07,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 157. [2021-11-23 16:47:07,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 154 states have (on average 1.1753246753246753) internal successors, (181), 156 states have internal predecessors, (181), 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 16:47:07,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 181 transitions. [2021-11-23 16:47:07,553 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 181 transitions. Word has length 37 [2021-11-23 16:47:07,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:47:07,554 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 181 transitions. [2021-11-23 16:47:07,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 9.0) internal successors, (36), 5 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 16:47:07,554 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 181 transitions. [2021-11-23 16:47:07,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-23 16:47:07,554 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:47:07,554 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:47:07,562 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (54)] Ended with exit code 0 [2021-11-23 16:47:07,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:47:07,755 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 16:47:07,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:47:07,755 INFO L85 PathProgramCache]: Analyzing trace with hash 1577218106, now seen corresponding path program 1 times [2021-11-23 16:47:07,755 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:47:07,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1750020909] [2021-11-23 16:47:07,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:47:07,756 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:47:07,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:47:07,756 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:47:07,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2021-11-23 16:47:07,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:47:07,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-23 16:47:07,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:47:07,897 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 16:47:07,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 16:47:08,439 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:47:08,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:47:11,396 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:47:11,396 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:47:11,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1750020909] [2021-11-23 16:47:11,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1750020909] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:47:11,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [402689814] [2021-11-23 16:47:11,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:47:11,397 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:47:11,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:47:11,398 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:47:11,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (56)] Waiting until timeout for monitored process [2021-11-23 16:47:11,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:47:11,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-23 16:47:11,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:47:12,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-23 16:47:12,949 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-23 16:47:12,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:47:13,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-11-23 16:47:13,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2021-11-23 16:47:14,376 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-23 16:47:14,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [402689814] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:47:14,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94465157] [2021-11-23 16:47:14,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:47:14,376 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:47:14,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:47:14,377 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:47:14,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-11-23 16:47:14,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:47:14,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-23 16:47:14,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:47:14,494 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 16:47:14,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 16:47:15,544 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:47:15,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:47:17,185 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:47:17,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94465157] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:47:17,185 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:47:17,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 14, 12, 12, 11] total 58 [2021-11-23 16:47:17,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406565980] [2021-11-23 16:47:17,186 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:47:17,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-11-23 16:47:17,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:47:17,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-11-23 16:47:17,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=3033, Unknown=0, NotChecked=0, Total=3306 [2021-11-23 16:47:17,188 INFO L87 Difference]: Start difference. First operand 157 states and 181 transitions. Second operand has 58 states, 58 states have (on average 3.2586206896551726) internal successors, (189), 58 states have internal predecessors, (189), 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 16:47:19,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:47:19,622 INFO L93 Difference]: Finished difference Result 181 states and 207 transitions. [2021-11-23 16:47:19,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-23 16:47:19,623 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 3.2586206896551726) internal successors, (189), 58 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-11-23 16:47:19,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:47:19,624 INFO L225 Difference]: With dead ends: 181 [2021-11-23 16:47:19,624 INFO L226 Difference]: Without dead ends: 181 [2021-11-23 16:47:19,625 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 190 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1464 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=425, Invalid=4131, Unknown=0, NotChecked=0, Total=4556 [2021-11-23 16:47:19,625 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 120 mSDsluCounter, 536 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 557 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:47:19,626 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 557 Invalid, 456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 415 Invalid, 0 Unknown, 16 Unchecked, 1.1s Time] [2021-11-23 16:47:19,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-11-23 16:47:19,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 177. [2021-11-23 16:47:19,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 174 states have (on average 1.1666666666666667) internal successors, (203), 176 states have internal predecessors, (203), 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 16:47:19,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 203 transitions. [2021-11-23 16:47:19,629 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 203 transitions. Word has length 42 [2021-11-23 16:47:19,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:47:19,629 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 203 transitions. [2021-11-23 16:47:19,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 3.2586206896551726) internal successors, (189), 58 states have internal predecessors, (189), 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 16:47:19,630 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 203 transitions. [2021-11-23 16:47:19,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-23 16:47:19,631 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:47:19,631 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:47:19,654 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (55)] Ended with exit code 0 [2021-11-23 16:47:19,844 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (56)] Ended with exit code 0 [2021-11-23 16:47:20,064 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2021-11-23 16:47:20,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:47:20,243 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 16:47:20,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:47:20,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1930803928, now seen corresponding path program 1 times [2021-11-23 16:47:20,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:47:20,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1152372615] [2021-11-23 16:47:20,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:47:20,244 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:47:20,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:47:20,245 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:47:20,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (58)] Waiting until timeout for monitored process [2021-11-23 16:47:20,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:47:20,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-23 16:47:20,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:47:20,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-11-23 16:47:20,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-23 16:47:20,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-23 16:47:20,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-11-23 16:47:20,855 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 16:47:20,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-11-23 16:47:21,506 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:47:21,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:47:22,901 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 16:47:22,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2021-11-23 16:47:22,915 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 16:47:22,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 42 [2021-11-23 16:47:22,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 16:47:23,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:47:23,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:47:23,651 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 16:47:23,651 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:47:23,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1152372615] [2021-11-23 16:47:23,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1152372615] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:47:23,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1923052278] [2021-11-23 16:47:23,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:47:23,651 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:47:23,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:47:23,652 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:47:23,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (59)] Waiting until timeout for monitored process [2021-11-23 16:47:23,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:47:23,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-23 16:47:23,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:47:23,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2021-11-23 16:47:24,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-23 16:47:24,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-11-23 16:47:25,139 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:47:25,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:47:25,506 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_702 (Array (_ BitVec 32) (_ BitVec 32)))) (= ((_ sign_extend 24) ((_ extract 7 0) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_702) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (bvadd |c_ULTIMATE.start_main_~nondetString1~0#1.offset| (_ bv1 32))))) (_ bv0 32))) is different from false [2021-11-23 16:47:25,516 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 16:47:25,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2021-11-23 16:47:25,526 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 16:47:25,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 42 [2021-11-23 16:47:25,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 16:47:26,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:47:26,087 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:47:26,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1923052278] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:47:26,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148113359] [2021-11-23 16:47:26,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:47:26,087 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:47:26,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:47:26,088 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:47:26,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-11-23 16:47:26,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:47:26,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-23 16:47:26,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:47:26,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-11-23 16:47:26,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-23 16:47:26,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-11-23 16:47:26,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:47:26,699 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 16:47:26,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 12 [2021-11-23 16:47:26,767 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:47:26,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:47:26,842 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_719 (Array (_ BitVec 32) (_ BitVec 32)))) (= ((_ sign_extend 24) ((_ extract 7 0) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_719) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (bvadd |c_ULTIMATE.start_main_~nondetString1~0#1.offset| (_ bv1 32))))) (_ bv0 32))) is different from false [2021-11-23 16:47:26,875 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 16:47:26,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2021-11-23 16:47:26,893 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 16:47:26,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 42 [2021-11-23 16:47:26,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 16:47:28,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:47:28,224 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:47:28,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148113359] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:47:28,224 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:47:28,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 12, 11, 12, 11] total 45 [2021-11-23 16:47:28,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349901288] [2021-11-23 16:47:28,225 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:47:28,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-11-23 16:47:28,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:47:28,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-11-23 16:47:28,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1628, Unknown=3, NotChecked=166, Total=1980 [2021-11-23 16:47:28,226 INFO L87 Difference]: Start difference. First operand 177 states and 203 transitions. Second operand has 45 states, 45 states have (on average 3.933333333333333) internal successors, (177), 45 states have internal predecessors, (177), 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 16:47:32,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:47:32,942 INFO L93 Difference]: Finished difference Result 291 states and 335 transitions. [2021-11-23 16:47:32,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-23 16:47:32,943 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 3.933333333333333) internal successors, (177), 45 states have internal predecessors, (177), 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 46 [2021-11-23 16:47:32,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:47:32,945 INFO L225 Difference]: With dead ends: 291 [2021-11-23 16:47:32,945 INFO L226 Difference]: Without dead ends: 269 [2021-11-23 16:47:32,946 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 227 SyntacticMatches, 6 SemanticMatches, 66 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1331 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=469, Invalid=3826, Unknown=3, NotChecked=258, Total=4556 [2021-11-23 16:47:32,947 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 248 mSDsluCounter, 650 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 687 SdHoareTripleChecker+Invalid, 688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 171 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:47:32,947 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 687 Invalid, 688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 473 Invalid, 0 Unknown, 171 Unchecked, 1.1s Time] [2021-11-23 16:47:32,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-11-23 16:47:32,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 267. [2021-11-23 16:47:32,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 264 states have (on average 1.1628787878787878) internal successors, (307), 266 states have internal predecessors, (307), 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 16:47:32,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 307 transitions. [2021-11-23 16:47:32,953 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 307 transitions. Word has length 46 [2021-11-23 16:47:32,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:47:32,954 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 307 transitions. [2021-11-23 16:47:32,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 3.933333333333333) internal successors, (177), 45 states have internal predecessors, (177), 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 16:47:32,954 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 307 transitions. [2021-11-23 16:47:32,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-23 16:47:32,955 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:47:32,955 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:47:32,982 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (58)] Forceful destruction successful, exit code 0 [2021-11-23 16:47:33,169 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (59)] Ended with exit code 0 [2021-11-23 16:47:33,389 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2021-11-23 16:47:33,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:47:33,568 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 16:47:33,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:47:33,568 INFO L85 PathProgramCache]: Analyzing trace with hash 371510231, now seen corresponding path program 2 times [2021-11-23 16:47:33,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:47:33,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1183653905] [2021-11-23 16:47:33,569 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 16:47:33,569 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:47:33,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:47:33,570 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:47:33,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (61)] Waiting until timeout for monitored process [2021-11-23 16:47:33,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 16:47:33,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:47:33,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-23 16:47:33,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:47:33,741 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 16:47:33,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 16:47:34,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-23 16:47:34,423 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 16:47:34,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-11-23 16:47:35,096 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:47:35,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:47:36,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-11-23 16:47:36,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2021-11-23 16:47:38,771 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:47:38,772 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:47:38,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1183653905] [2021-11-23 16:47:38,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1183653905] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:47:38,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [322229852] [2021-11-23 16:47:38,772 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 16:47:38,772 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:47:38,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:47:38,773 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:47:38,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (62)] Waiting until timeout for monitored process [2021-11-23 16:47:38,982 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 16:47:38,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:47:38,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-23 16:47:38,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:47:39,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-23 16:47:41,080 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:47:41,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:47:42,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-11-23 16:47:42,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2021-11-23 16:47:44,766 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:47:44,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [322229852] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:47:44,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121836334] [2021-11-23 16:47:44,767 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 16:47:44,767 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:47:44,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:47:44,768 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:47:44,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-11-23 16:47:44,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 16:47:44,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:47:44,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-23 16:47:44,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:47:44,911 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 16:47:44,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 16:47:45,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-23 16:47:47,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:47:47,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2021-11-23 16:47:47,377 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:47:47,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:47:48,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-11-23 16:47:48,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2021-11-23 16:47:52,108 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:47:52,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121836334] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:47:52,108 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:47:52,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 17, 15, 17, 15] total 79 [2021-11-23 16:47:52,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972383436] [2021-11-23 16:47:52,109 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:47:52,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2021-11-23 16:47:52,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:47:52,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-11-23 16:47:52,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=490, Invalid=5672, Unknown=0, NotChecked=0, Total=6162 [2021-11-23 16:47:52,112 INFO L87 Difference]: Start difference. First operand 267 states and 307 transitions. Second operand has 79 states, 79 states have (on average 2.8860759493670884) internal successors, (228), 79 states have internal predecessors, (228), 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 16:48:19,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:48:19,577 INFO L93 Difference]: Finished difference Result 845 states and 940 transitions. [2021-11-23 16:48:19,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-11-23 16:48:19,578 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 2.8860759493670884) internal successors, (228), 79 states have internal predecessors, (228), 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 46 [2021-11-23 16:48:19,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:48:19,581 INFO L225 Difference]: With dead ends: 845 [2021-11-23 16:48:19,581 INFO L226 Difference]: Without dead ends: 823 [2021-11-23 16:48:19,591 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 193 SyntacticMatches, 2 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5053 ImplicationChecksByTransitivity, 34.6s TimeCoverageRelationStatistics Valid=1957, Invalid=14045, Unknown=0, NotChecked=0, Total=16002 [2021-11-23 16:48:19,592 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 1288 mSDsluCounter, 1407 mSDsCounter, 0 mSdLazyCounter, 2348 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1288 SdHoareTripleChecker+Valid, 1460 SdHoareTripleChecker+Invalid, 2887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 2348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 362 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2021-11-23 16:48:19,592 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1288 Valid, 1460 Invalid, 2887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 2348 Invalid, 0 Unknown, 362 Unchecked, 6.3s Time] [2021-11-23 16:48:19,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 823 states. [2021-11-23 16:48:19,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 823 to 499. [2021-11-23 16:48:19,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 496 states have (on average 1.1653225806451613) internal successors, (578), 498 states have internal predecessors, (578), 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 16:48:19,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 578 transitions. [2021-11-23 16:48:19,605 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 578 transitions. Word has length 46 [2021-11-23 16:48:19,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:48:19,606 INFO L470 AbstractCegarLoop]: Abstraction has 499 states and 578 transitions. [2021-11-23 16:48:19,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 2.8860759493670884) internal successors, (228), 79 states have internal predecessors, (228), 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 16:48:19,606 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 578 transitions. [2021-11-23 16:48:19,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-23 16:48:19,607 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:48:19,607 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2021-11-23 16:48:19,632 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2021-11-23 16:48:19,826 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (61)] Forceful destruction successful, exit code 0 [2021-11-23 16:48:20,020 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (62)] Ended with exit code 0 [2021-11-23 16:48:20,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 16:48:20,219 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 16:48:20,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:48:20,219 INFO L85 PathProgramCache]: Analyzing trace with hash -523698423, now seen corresponding path program 3 times [2021-11-23 16:48:20,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:48:20,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [174118284] [2021-11-23 16:48:20,220 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 16:48:20,220 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:48:20,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:48:20,222 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:48:20,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (64)] Waiting until timeout for monitored process [2021-11-23 16:48:20,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-23 16:48:20,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:48:20,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-23 16:48:20,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:48:20,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:48:20,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-23 16:48:20,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-11-23 16:48:20,934 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 28 proven. 10 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-11-23 16:48:20,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:48:31,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:48:32,583 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-11-23 16:48:32,584 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:48:32,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [174118284] [2021-11-23 16:48:32,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [174118284] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:48:32,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2025897892] [2021-11-23 16:48:32,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 16:48:32,584 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:48:32,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:48:32,585 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:48:32,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (65)] Waiting until timeout for monitored process [2021-11-23 16:48:32,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-23 16:48:32,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:48:32,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 16:48:32,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:48:32,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:48:32,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-23 16:48:32,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-11-23 16:48:33,855 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 27 proven. 20 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-11-23 16:48:33,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:48:43,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:48:44,536 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 9 proven. 38 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-11-23 16:48:44,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2025897892] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:48:44,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377159364] [2021-11-23 16:48:44,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 16:48:44,537 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:48:44,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:48:44,538 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:48:44,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-11-23 16:48:44,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-23 16:48:44,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:48:44,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-23 16:48:44,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:48:44,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 16:48:44,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-23 16:48:44,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-11-23 16:48:45,247 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 28 proven. 10 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-11-23 16:48:45,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:48:55,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 16:48:56,503 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-11-23 16:48:56,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377159364] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:48:56,503 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:48:56,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7, 7, 6, 6] total 16 [2021-11-23 16:48:56,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321967923] [2021-11-23 16:48:56,503 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:48:56,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-23 16:48:56,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:48:56,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-23 16:48:56,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2021-11-23 16:48:56,504 INFO L87 Difference]: Start difference. First operand 499 states and 578 transitions. Second operand has 17 states, 16 states have (on average 2.375) internal successors, (38), 17 states have internal predecessors, (38), 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 16:48:57,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:48:57,758 INFO L93 Difference]: Finished difference Result 498 states and 576 transitions. [2021-11-23 16:48:57,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 16:48:57,759 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.375) internal successors, (38), 17 states have internal predecessors, (38), 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 47 [2021-11-23 16:48:57,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:48:57,761 INFO L225 Difference]: With dead ends: 498 [2021-11-23 16:48:57,761 INFO L226 Difference]: Without dead ends: 455 [2021-11-23 16:48:57,761 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 260 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=133, Invalid=247, Unknown=0, NotChecked=0, Total=380 [2021-11-23 16:48:57,761 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 135 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-23 16:48:57,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 74 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 62 Invalid, 0 Unknown, 7 Unchecked, 0.7s Time] [2021-11-23 16:48:57,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2021-11-23 16:48:57,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 422. [2021-11-23 16:48:57,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 420 states have (on average 1.1690476190476191) internal successors, (491), 421 states have internal predecessors, (491), 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 16:48:57,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 491 transitions. [2021-11-23 16:48:57,770 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 491 transitions. Word has length 47 [2021-11-23 16:48:57,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:48:57,770 INFO L470 AbstractCegarLoop]: Abstraction has 422 states and 491 transitions. [2021-11-23 16:48:57,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.375) internal successors, (38), 17 states have internal predecessors, (38), 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 16:48:57,770 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 491 transitions. [2021-11-23 16:48:57,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-23 16:48:57,771 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:48:57,772 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:48:57,806 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2021-11-23 16:48:57,993 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (64)] Ended with exit code 0 [2021-11-23 16:48:58,188 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (65)] Ended with exit code 0 [2021-11-23 16:48:58,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 16:48:58,387 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 16:48:58,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:48:58,387 INFO L85 PathProgramCache]: Analyzing trace with hash -1328442960, now seen corresponding path program 3 times [2021-11-23 16:48:58,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:48:58,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [38444133] [2021-11-23 16:48:58,388 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 16:48:58,388 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:48:58,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:48:58,389 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:48:58,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (67)] Waiting until timeout for monitored process [2021-11-23 16:48:58,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-23 16:48:58,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:48:58,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-23 16:48:58,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:48:58,707 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 16:48:58,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 16:48:59,707 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 31 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:48:59,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:49:03,976 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 16:49:03,976 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:49:03,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [38444133] [2021-11-23 16:49:03,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [38444133] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:49:03,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1060741844] [2021-11-23 16:49:03,977 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 16:49:03,977 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:49:03,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:49:03,978 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:49:03,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (68)] Waiting until timeout for monitored process [2021-11-23 16:49:04,392 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-23 16:49:04,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:49:04,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-23 16:49:04,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:49:04,462 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 16:49:04,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 16:49:04,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 16:49:10,214 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-11-23 16:49:10,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2021-11-23 16:49:10,672 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 15 proven. 16 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-23 16:49:10,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:49:48,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-11-23 16:49:48,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2021-11-23 16:49:53,696 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-11-23 16:49:53,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1060741844] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:49:53,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490695665] [2021-11-23 16:49:53,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 16:49:53,697 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:49:53,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:49:53,698 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:49:53,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00aa7c83-4a3f-425a-b441-a7d1f0021c5a/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-11-23 16:49:54,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-23 16:49:54,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 16:49:54,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-23 16:49:54,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:49:54,096 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 16:49:54,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 16:49:57,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2021-11-23 16:49:57,709 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 41 proven. 67 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 16:49:57,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:50:04,858 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 41 proven. 67 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 16:50:04,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490695665] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:50:04,858 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 16:50:04,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 11, 10, 17, 17] total 73 [2021-11-23 16:50:04,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547987337] [2021-11-23 16:50:04,859 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 16:50:04,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2021-11-23 16:50:04,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:50:04,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-11-23 16:50:04,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=461, Invalid=4778, Unknown=17, NotChecked=0, Total=5256 [2021-11-23 16:50:04,863 INFO L87 Difference]: Start difference. First operand 422 states and 491 transitions. Second operand has 73 states, 73 states have (on average 4.0) internal successors, (292), 73 states have internal predecessors, (292), 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 16:50:22,536 WARN L227 SmtUtils]: Spent 7.03s on a formula simplification. DAG size of input: 79 DAG size of output: 65 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 16:50:37,734 WARN L227 SmtUtils]: Spent 13.67s on a formula simplification. DAG size of input: 100 DAG size of output: 84 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 16:51:04,569 WARN L227 SmtUtils]: Spent 20.39s on a formula simplification. DAG size of input: 126 DAG size of output: 108 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 16:51:15,051 WARN L227 SmtUtils]: Spent 6.88s on a formula simplification. DAG size of input: 69 DAG size of output: 57 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 16:51:30,338 WARN L227 SmtUtils]: Spent 13.03s on a formula simplification. DAG size of input: 81 DAG size of output: 69 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 16:51:59,250 WARN L227 SmtUtils]: Spent 21.83s on a formula simplification. DAG size of input: 132 DAG size of output: 114 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 16:52:30,150 WARN L227 SmtUtils]: Spent 22.04s on a formula simplification. DAG size of input: 140 DAG size of output: 122 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 16:52:52,727 WARN L227 SmtUtils]: Spent 19.45s on a formula simplification. DAG size of input: 99 DAG size of output: 87 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 16:53:29,196 WARN L227 SmtUtils]: Spent 22.56s on a formula simplification. DAG size of input: 140 DAG size of output: 118 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 16:54:15,893 WARN L227 SmtUtils]: Spent 22.75s on a formula simplification. DAG size of input: 135 DAG size of output: 117 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 16:54:41,538 WARN L227 SmtUtils]: Spent 20.14s on a formula simplification. DAG size of input: 105 DAG size of output: 93 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 16:55:06,224 WARN L227 SmtUtils]: Spent 18.61s on a formula simplification. DAG size of input: 60 DAG size of output: 53 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 16:55:34,674 WARN L227 SmtUtils]: Spent 20.90s on a formula simplification. DAG size of input: 113 DAG size of output: 101 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 16:55:51,273 WARN L227 SmtUtils]: Spent 14.44s on a formula simplification. DAG size of input: 135 DAG size of output: 104 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 16:56:20,416 WARN L227 SmtUtils]: Spent 26.97s on a formula simplification. DAG size of input: 65 DAG size of output: 55 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 16:56:53,888 WARN L227 SmtUtils]: Spent 21.37s on a formula simplification. DAG size of input: 113 DAG size of output: 97 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 16:57:10,040 WARN L227 SmtUtils]: Spent 14.25s on a formula simplification. DAG size of input: 135 DAG size of output: 104 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 16:57:39,170 WARN L227 SmtUtils]: Spent 27.74s on a formula simplification. DAG size of input: 72 DAG size of output: 63 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 16:57:54,773 WARN L227 SmtUtils]: Spent 14.20s on a formula simplification. DAG size of input: 133 DAG size of output: 102 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 16:58:03,818 WARN L227 SmtUtils]: Spent 7.20s on a formula simplification. DAG size of input: 64 DAG size of output: 54 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 16:58:37,083 WARN L227 SmtUtils]: Spent 21.07s on a formula simplification. DAG size of input: 108 DAG size of output: 96 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 16:59:13,472 WARN L227 SmtUtils]: Spent 18.41s on a formula simplification. DAG size of input: 50 DAG size of output: 45 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)