./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/ss1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d6691-dad7-4da2-8ffd-11c52b6da3fa/bin/uautomizer-w2VwFs6gM0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d6691-dad7-4da2-8ffd-11c52b6da3fa/bin/uautomizer-w2VwFs6gM0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d6691-dad7-4da2-8ffd-11c52b6da3fa/bin/uautomizer-w2VwFs6gM0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d6691-dad7-4da2-8ffd-11c52b6da3fa/bin/uautomizer-w2VwFs6gM0/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-fpi/ss1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d6691-dad7-4da2-8ffd-11c52b6da3fa/bin/uautomizer-w2VwFs6gM0/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d6691-dad7-4da2-8ffd-11c52b6da3fa/bin/uautomizer-w2VwFs6gM0 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 26cc6c43657aae3d6045b0e296032a25844d2e64f01344915dc1323c4b8b39f3 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-22 15:23:39,328 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-22 15:23:39,331 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-22 15:23:39,397 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-22 15:23:39,398 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-22 15:23:39,404 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-22 15:23:39,407 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-22 15:23:39,412 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-22 15:23:39,416 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-22 15:23:39,426 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-22 15:23:39,428 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-22 15:23:39,430 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-22 15:23:39,431 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-22 15:23:39,435 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-22 15:23:39,437 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-22 15:23:39,439 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-22 15:23:39,440 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-22 15:23:39,441 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-22 15:23:39,444 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-22 15:23:39,447 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-22 15:23:39,450 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-22 15:23:39,452 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-22 15:23:39,454 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-22 15:23:39,455 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-22 15:23:39,459 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-22 15:23:39,460 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-22 15:23:39,461 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-22 15:23:39,462 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-22 15:23:39,463 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-22 15:23:39,464 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-22 15:23:39,465 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-22 15:23:39,466 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-22 15:23:39,468 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-22 15:23:39,469 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-22 15:23:39,471 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-22 15:23:39,471 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-22 15:23:39,472 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-22 15:23:39,473 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-22 15:23:39,474 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-22 15:23:39,475 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-22 15:23:39,476 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-22 15:23:39,478 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d6691-dad7-4da2-8ffd-11c52b6da3fa/bin/uautomizer-w2VwFs6gM0/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-22 15:23:39,509 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-22 15:23:39,510 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-22 15:23:39,511 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-22 15:23:39,511 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-22 15:23:39,512 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-22 15:23:39,513 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-22 15:23:39,513 INFO L138 SettingsManager]: * Use SBE=true [2021-11-22 15:23:39,514 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-22 15:23:39,514 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-22 15:23:39,514 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-22 15:23:39,515 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-22 15:23:39,515 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-22 15:23:39,515 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-22 15:23:39,516 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-22 15:23:39,516 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-22 15:23:39,517 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-22 15:23:39,517 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-22 15:23:39,517 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-22 15:23:39,518 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-22 15:23:39,518 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-22 15:23:39,518 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-22 15:23:39,519 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-22 15:23:39,519 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 15:23:39,519 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-22 15:23:39,520 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-22 15:23:39,520 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-22 15:23:39,521 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-22 15:23:39,521 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-22 15:23:39,521 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-22 15:23:39,522 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-22 15:23:39,522 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-22 15:23:39,522 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-22 15:23:39,523 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_246d6691-dad7-4da2-8ffd-11c52b6da3fa/bin/uautomizer-w2VwFs6gM0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d6691-dad7-4da2-8ffd-11c52b6da3fa/bin/uautomizer-w2VwFs6gM0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 26cc6c43657aae3d6045b0e296032a25844d2e64f01344915dc1323c4b8b39f3 [2021-11-22 15:23:39,837 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-22 15:23:39,865 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-22 15:23:39,869 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-22 15:23:39,870 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-22 15:23:39,871 INFO L275 PluginConnector]: CDTParser initialized [2021-11-22 15:23:39,873 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d6691-dad7-4da2-8ffd-11c52b6da3fa/bin/uautomizer-w2VwFs6gM0/../../sv-benchmarks/c/array-fpi/ss1.c [2021-11-22 15:23:39,953 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d6691-dad7-4da2-8ffd-11c52b6da3fa/bin/uautomizer-w2VwFs6gM0/data/ebff5bf5f/29c3347ee3674b6ea87c7ac26fc839bc/FLAG6a02892bb [2021-11-22 15:23:40,538 INFO L306 CDTParser]: Found 1 translation units. [2021-11-22 15:23:40,539 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d6691-dad7-4da2-8ffd-11c52b6da3fa/sv-benchmarks/c/array-fpi/ss1.c [2021-11-22 15:23:40,547 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d6691-dad7-4da2-8ffd-11c52b6da3fa/bin/uautomizer-w2VwFs6gM0/data/ebff5bf5f/29c3347ee3674b6ea87c7ac26fc839bc/FLAG6a02892bb [2021-11-22 15:23:40,855 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d6691-dad7-4da2-8ffd-11c52b6da3fa/bin/uautomizer-w2VwFs6gM0/data/ebff5bf5f/29c3347ee3674b6ea87c7ac26fc839bc [2021-11-22 15:23:40,858 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-22 15:23:40,860 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-22 15:23:40,872 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-22 15:23:40,873 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-22 15:23:40,877 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-22 15:23:40,878 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 03:23:40" (1/1) ... [2021-11-22 15:23:40,880 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32f1b8b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:23:40, skipping insertion in model container [2021-11-22 15:23:40,880 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 03:23:40" (1/1) ... [2021-11-22 15:23:40,889 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-22 15:23:40,908 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-22 15:23:41,138 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d6691-dad7-4da2-8ffd-11c52b6da3fa/sv-benchmarks/c/array-fpi/ss1.c[586,599] [2021-11-22 15:23:41,163 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 15:23:41,172 INFO L203 MainTranslator]: Completed pre-run [2021-11-22 15:23:41,187 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d6691-dad7-4da2-8ffd-11c52b6da3fa/sv-benchmarks/c/array-fpi/ss1.c[586,599] [2021-11-22 15:23:41,199 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 15:23:41,214 INFO L208 MainTranslator]: Completed translation [2021-11-22 15:23:41,215 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:23:41 WrapperNode [2021-11-22 15:23:41,215 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-22 15:23:41,217 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-22 15:23:41,217 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-22 15:23:41,217 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-22 15:23:41,226 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:23:41" (1/1) ... [2021-11-22 15:23:41,236 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:23:41" (1/1) ... [2021-11-22 15:23:41,265 INFO L137 Inliner]: procedures = 17, calls = 31, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 95 [2021-11-22 15:23:41,265 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-22 15:23:41,266 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-22 15:23:41,267 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-22 15:23:41,267 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-22 15:23:41,278 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:23:41" (1/1) ... [2021-11-22 15:23:41,279 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:23:41" (1/1) ... [2021-11-22 15:23:41,283 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:23:41" (1/1) ... [2021-11-22 15:23:41,287 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:23:41" (1/1) ... [2021-11-22 15:23:41,297 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:23:41" (1/1) ... [2021-11-22 15:23:41,316 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:23:41" (1/1) ... [2021-11-22 15:23:41,325 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:23:41" (1/1) ... [2021-11-22 15:23:41,337 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-22 15:23:41,338 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-22 15:23:41,339 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-22 15:23:41,339 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-22 15:23:41,345 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:23:41" (1/1) ... [2021-11-22 15:23:41,354 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 15:23:41,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d6691-dad7-4da2-8ffd-11c52b6da3fa/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:23:41,402 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d6691-dad7-4da2-8ffd-11c52b6da3fa/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-22 15:23:41,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d6691-dad7-4da2-8ffd-11c52b6da3fa/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-22 15:23:41,470 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-22 15:23:41,471 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-22 15:23:41,471 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-22 15:23:41,471 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-22 15:23:41,471 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-22 15:23:41,471 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-22 15:23:41,472 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-22 15:23:41,472 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-22 15:23:41,472 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-22 15:23:41,598 INFO L236 CfgBuilder]: Building ICFG [2021-11-22 15:23:41,600 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-22 15:23:41,804 INFO L277 CfgBuilder]: Performing block encoding [2021-11-22 15:23:41,812 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-22 15:23:41,813 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-22 15:23:41,815 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 03:23:41 BoogieIcfgContainer [2021-11-22 15:23:41,816 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-22 15:23:41,818 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-22 15:23:41,818 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-22 15:23:41,823 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-22 15:23:41,823 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 03:23:40" (1/3) ... [2021-11-22 15:23:41,825 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f605c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 03:23:41, skipping insertion in model container [2021-11-22 15:23:41,825 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:23:41" (2/3) ... [2021-11-22 15:23:41,826 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f605c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 03:23:41, skipping insertion in model container [2021-11-22 15:23:41,826 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 03:23:41" (3/3) ... [2021-11-22 15:23:41,828 INFO L111 eAbstractionObserver]: Analyzing ICFG ss1.c [2021-11-22 15:23:41,835 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-22 15:23:41,835 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-22 15:23:41,899 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-22 15:23:41,909 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-22 15:23:41,909 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-22 15:23:41,929 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:23:41,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-22 15:23:41,937 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:23:41,938 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:23:41,939 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:23:41,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:23:41,946 INFO L85 PathProgramCache]: Analyzing trace with hash -1202110748, now seen corresponding path program 1 times [2021-11-22 15:23:41,958 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:23:41,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412427104] [2021-11-22 15:23:41,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:23:41,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:23:42,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:23:42,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:23:42,218 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:23:42,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412427104] [2021-11-22 15:23:42,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412427104] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:23:42,220 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:23:42,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-22 15:23:42,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409421819] [2021-11-22 15:23:42,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:23:42,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-22 15:23:42,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:23:42,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-22 15:23:42,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-22 15:23:42,289 INFO L87 Difference]: Start difference. First operand has 24 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:23:42,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:23:42,318 INFO L93 Difference]: Finished difference Result 44 states and 62 transitions. [2021-11-22 15:23:42,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-22 15:23:42,321 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-22 15:23:42,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:23:42,333 INFO L225 Difference]: With dead ends: 44 [2021-11-22 15:23:42,334 INFO L226 Difference]: Without dead ends: 20 [2021-11-22 15:23:42,338 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-22 15:23:42,349 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 15:23:42,352 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 15:23:42,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-22 15:23:42,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-11-22 15:23:42,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 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) [2021-11-22 15:23:42,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2021-11-22 15:23:42,397 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 15 [2021-11-22 15:23:42,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:23:42,398 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2021-11-22 15:23:42,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:23:42,398 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2021-11-22 15:23:42,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-22 15:23:42,400 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:23:42,400 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:23:42,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-22 15:23:42,402 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:23:42,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:23:42,403 INFO L85 PathProgramCache]: Analyzing trace with hash -944124056, now seen corresponding path program 1 times [2021-11-22 15:23:42,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:23:42,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579805259] [2021-11-22 15:23:42,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:23:42,405 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:23:42,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:23:42,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:23:42,515 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:23:42,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579805259] [2021-11-22 15:23:42,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579805259] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:23:42,516 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:23:42,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-22 15:23:42,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759920993] [2021-11-22 15:23:42,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:23:42,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 15:23:42,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:23:42,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 15:23:42,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-22 15:23:42,521 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:23:42,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:23:42,617 INFO L93 Difference]: Finished difference Result 41 states and 50 transitions. [2021-11-22 15:23:42,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 15:23:42,618 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-22 15:23:42,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:23:42,620 INFO L225 Difference]: With dead ends: 41 [2021-11-22 15:23:42,620 INFO L226 Difference]: Without dead ends: 28 [2021-11-22 15:23:42,621 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-22 15:23:42,623 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 15:23:42,625 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 12 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 15:23:42,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-11-22 15:23:42,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2021-11-22 15:23:42,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 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) [2021-11-22 15:23:42,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-11-22 15:23:42,635 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 15 [2021-11-22 15:23:42,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:23:42,635 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-11-22 15:23:42,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:23:42,636 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-11-22 15:23:42,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-22 15:23:42,638 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:23:42,638 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] [2021-11-22 15:23:42,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-22 15:23:42,639 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:23:42,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:23:42,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1401448688, now seen corresponding path program 1 times [2021-11-22 15:23:42,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:23:42,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65440587] [2021-11-22 15:23:42,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:23:42,642 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:23:42,729 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 15:23:42,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1578748182] [2021-11-22 15:23:42,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:23:42,730 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:23:42,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d6691-dad7-4da2-8ffd-11c52b6da3fa/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:23:42,733 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d6691-dad7-4da2-8ffd-11c52b6da3fa/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:23:42,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d6691-dad7-4da2-8ffd-11c52b6da3fa/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-22 15:23:42,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:23:42,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-22 15:23:42,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:23:43,060 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 11 treesize of output 7 [2021-11-22 15:23:43,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:23:43,153 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 19 treesize of output 18 [2021-11-22 15:23:43,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:23:43,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-11-22 15:23:43,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:23:43,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 23 [2021-11-22 15:23:43,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-22 15:23:43,883 INFO L354 Elim1Store]: treesize reduction 93, result has 10.6 percent of original size [2021-11-22 15:23:43,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 55 treesize of output 35 [2021-11-22 15:23:44,219 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-22 15:23:44,220 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 81 treesize of output 57 [2021-11-22 15:23:44,302 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:23:44,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:23:45,392 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:23:45,393 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:23:45,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65440587] [2021-11-22 15:23:45,394 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 15:23:45,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578748182] [2021-11-22 15:23:45,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578748182] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:23:45,395 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 15:23:45,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-11-22 15:23:45,395 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836557803] [2021-11-22 15:23:45,395 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 15:23:45,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-22 15:23:45,396 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:23:45,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-22 15:23:45,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2021-11-22 15:23:45,399 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 25 states, 25 states have (on average 1.68) internal successors, (42), 25 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:23:46,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:23:46,508 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2021-11-22 15:23:46,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-22 15:23:46,508 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 25 states have internal predecessors, (42), 0 states have call successors, (0), 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 [2021-11-22 15:23:46,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:23:46,511 INFO L225 Difference]: With dead ends: 46 [2021-11-22 15:23:46,511 INFO L226 Difference]: Without dead ends: 41 [2021-11-22 15:23:46,512 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=164, Invalid=828, Unknown=0, NotChecked=0, Total=992 [2021-11-22 15:23:46,514 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 23 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-22 15:23:46,515 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 54 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 183 Invalid, 0 Unknown, 24 Unchecked, 0.5s Time] [2021-11-22 15:23:46,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-11-22 15:23:46,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 35. [2021-11-22 15:23:46,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 34 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:23:46,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2021-11-22 15:23:46,525 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 23 [2021-11-22 15:23:46,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:23:46,525 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2021-11-22 15:23:46,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 25 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:23:46,526 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2021-11-22 15:23:46,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-22 15:23:46,527 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:23:46,527 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] [2021-11-22 15:23:46,560 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d6691-dad7-4da2-8ffd-11c52b6da3fa/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-22 15:23:46,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d6691-dad7-4da2-8ffd-11c52b6da3fa/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:23:46,748 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:23:46,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:23:46,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1774307726, now seen corresponding path program 2 times [2021-11-22 15:23:46,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:23:46,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147648654] [2021-11-22 15:23:46,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:23:46,750 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:23:46,777 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 15:23:46,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [274367726] [2021-11-22 15:23:46,778 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-22 15:23:46,778 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:23:46,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d6691-dad7-4da2-8ffd-11c52b6da3fa/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:23:46,779 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d6691-dad7-4da2-8ffd-11c52b6da3fa/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:23:46,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d6691-dad7-4da2-8ffd-11c52b6da3fa/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-22 15:23:46,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-22 15:23:46,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 15:23:46,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-22 15:23:46,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:23:46,970 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-22 15:23:46,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:23:47,047 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-22 15:23:47,048 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:23:47,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147648654] [2021-11-22 15:23:47,048 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 15:23:47,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274367726] [2021-11-22 15:23:47,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274367726] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:23:47,049 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 15:23:47,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-11-22 15:23:47,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792861876] [2021-11-22 15:23:47,050 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 15:23:47,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-22 15:23:47,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:23:47,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-22 15:23:47,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-22 15:23:47,057 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 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) [2021-11-22 15:23:47,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:23:47,253 INFO L93 Difference]: Finished difference Result 80 states and 91 transitions. [2021-11-22 15:23:47,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-22 15:23:47,254 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 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 25 [2021-11-22 15:23:47,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:23:47,255 INFO L225 Difference]: With dead ends: 80 [2021-11-22 15:23:47,255 INFO L226 Difference]: Without dead ends: 48 [2021-11-22 15:23:47,256 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-11-22 15:23:47,257 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 68 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 15:23:47,258 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 31 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 15:23:47,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-11-22 15:23:47,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 34. [2021-11-22 15:23:47,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 33 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) [2021-11-22 15:23:47,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2021-11-22 15:23:47,267 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 25 [2021-11-22 15:23:47,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:23:47,267 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2021-11-22 15:23:47,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 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) [2021-11-22 15:23:47,268 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2021-11-22 15:23:47,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-22 15:23:47,269 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:23:47,269 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:23:47,313 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d6691-dad7-4da2-8ffd-11c52b6da3fa/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-22 15:23:47,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d6691-dad7-4da2-8ffd-11c52b6da3fa/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:23:47,488 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:23:47,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:23:47,489 INFO L85 PathProgramCache]: Analyzing trace with hash -1964080588, now seen corresponding path program 3 times [2021-11-22 15:23:47,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:23:47,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131889234] [2021-11-22 15:23:47,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:23:47,490 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:23:47,522 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 15:23:47,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1040491662] [2021-11-22 15:23:47,529 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-22 15:23:47,529 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:23:47,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d6691-dad7-4da2-8ffd-11c52b6da3fa/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:23:47,531 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d6691-dad7-4da2-8ffd-11c52b6da3fa/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:23:47,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d6691-dad7-4da2-8ffd-11c52b6da3fa/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-22 15:23:47,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-22 15:23:47,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 15:23:47,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-22 15:23:47,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:23:47,720 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-22 15:23:47,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:23:47,823 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-22 15:23:47,823 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:23:47,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131889234] [2021-11-22 15:23:47,824 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 15:23:47,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040491662] [2021-11-22 15:23:47,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040491662] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:23:47,824 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 15:23:47,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-11-22 15:23:47,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935300581] [2021-11-22 15:23:47,826 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 15:23:47,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-22 15:23:47,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:23:47,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-22 15:23:47,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-22 15:23:47,828 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 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) [2021-11-22 15:23:47,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:23:47,999 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2021-11-22 15:23:47,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-22 15:23:47,999 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 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 27 [2021-11-22 15:23:48,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:23:48,000 INFO L225 Difference]: With dead ends: 43 [2021-11-22 15:23:48,001 INFO L226 Difference]: Without dead ends: 35 [2021-11-22 15:23:48,001 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-11-22 15:23:48,002 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 38 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 15:23:48,002 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 25 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 15:23:48,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-11-22 15:23:48,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2021-11-22 15:23:48,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 31 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:23:48,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2021-11-22 15:23:48,009 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 27 [2021-11-22 15:23:48,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:23:48,009 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2021-11-22 15:23:48,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 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) [2021-11-22 15:23:48,010 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2021-11-22 15:23:48,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-22 15:23:48,011 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:23:48,011 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:23:48,063 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d6691-dad7-4da2-8ffd-11c52b6da3fa/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-22 15:23:48,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d6691-dad7-4da2-8ffd-11c52b6da3fa/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:23:48,232 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:23:48,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:23:48,233 INFO L85 PathProgramCache]: Analyzing trace with hash 666081912, now seen corresponding path program 4 times [2021-11-22 15:23:48,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:23:48,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326105170] [2021-11-22 15:23:48,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:23:48,233 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:23:48,266 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 15:23:48,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [489542915] [2021-11-22 15:23:48,267 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-22 15:23:48,267 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:23:48,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d6691-dad7-4da2-8ffd-11c52b6da3fa/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:23:48,268 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d6691-dad7-4da2-8ffd-11c52b6da3fa/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:23:48,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d6691-dad7-4da2-8ffd-11c52b6da3fa/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-22 15:23:48,312 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-22 15:23:48,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 15:23:48,314 WARN L261 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-22 15:23:48,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:23:48,339 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 11 treesize of output 7 [2021-11-22 15:23:48,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:23:48,366 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 23 treesize of output 22 [2021-11-22 15:23:48,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:23:48,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:23:48,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-22 15:23:48,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:23:48,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-22 15:23:48,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:23:48,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 39 [2021-11-22 15:23:48,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:23:48,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:23:48,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 35 [2021-11-22 15:23:48,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:23:48,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-22 15:23:48,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:23:48,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 41 [2021-11-22 15:23:49,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:23:49,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:23:49,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 35 [2021-11-22 15:23:49,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:23:49,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-22 15:23:49,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:23:49,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 39 [2021-11-22 15:23:49,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-22 15:23:49,475 INFO L354 Elim1Store]: treesize reduction 131, result has 12.1 percent of original size [2021-11-22 15:23:49,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 56 treesize of output 43 [2021-11-22 15:23:49,744 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-22 15:23:49,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 78 treesize of output 54 [2021-11-22 15:23:49,808 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:23:49,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:24:02,574 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:24:02,575 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:24:02,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326105170] [2021-11-22 15:24:02,575 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 15:24:02,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489542915] [2021-11-22 15:24:02,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489542915] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:24:02,576 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 15:24:02,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 39 [2021-11-22 15:24:02,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354191189] [2021-11-22 15:24:02,576 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 15:24:02,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-22 15:24:02,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:24:02,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-22 15:24:02,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1331, Unknown=1, NotChecked=0, Total=1482 [2021-11-22 15:24:02,580 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 39 states, 39 states have (on average 1.435897435897436) internal successors, (56), 39 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:24:55,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:24:55,672 INFO L93 Difference]: Finished difference Result 82 states and 93 transitions. [2021-11-22 15:24:55,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-11-22 15:24:55,673 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.435897435897436) internal successors, (56), 39 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-11-22 15:24:55,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:24:55,674 INFO L225 Difference]: With dead ends: 82 [2021-11-22 15:24:55,674 INFO L226 Difference]: Without dead ends: 77 [2021-11-22 15:24:55,676 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 652 ImplicationChecksByTransitivity, 62.6s TimeCoverageRelationStatistics Valid=315, Invalid=3465, Unknown=2, NotChecked=0, Total=3782 [2021-11-22 15:24:55,677 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 12 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 169 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-11-22 15:24:55,678 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 101 Invalid, 707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 471 Invalid, 0 Unknown, 169 Unchecked, 2.6s Time] [2021-11-22 15:24:55,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-11-22 15:24:55,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 65. [2021-11-22 15:24:55,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.171875) internal successors, (75), 64 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:24:55,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 75 transitions. [2021-11-22 15:24:55,690 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 75 transitions. Word has length 31 [2021-11-22 15:24:55,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:24:55,691 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 75 transitions. [2021-11-22 15:24:55,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.435897435897436) internal successors, (56), 39 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:24:55,691 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 75 transitions. [2021-11-22 15:24:55,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-22 15:24:55,693 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:24:55,693 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:24:55,718 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d6691-dad7-4da2-8ffd-11c52b6da3fa/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-22 15:24:55,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d6691-dad7-4da2-8ffd-11c52b6da3fa/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:24:55,908 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:24:55,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:24:55,908 INFO L85 PathProgramCache]: Analyzing trace with hash 207824378, now seen corresponding path program 5 times [2021-11-22 15:24:55,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:24:55,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110673746] [2021-11-22 15:24:55,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:24:55,909 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:24:55,933 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 15:24:55,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [291092153] [2021-11-22 15:24:55,939 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-22 15:24:55,939 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:24:55,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d6691-dad7-4da2-8ffd-11c52b6da3fa/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:24:55,940 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d6691-dad7-4da2-8ffd-11c52b6da3fa/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:24:55,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d6691-dad7-4da2-8ffd-11c52b6da3fa/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-22 15:24:56,010 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-22 15:24:56,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 15:24:56,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-22 15:24:56,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:24:56,128 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-22 15:24:56,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:24:56,222 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-22 15:24:56,222 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:24:56,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110673746] [2021-11-22 15:24:56,222 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 15:24:56,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291092153] [2021-11-22 15:24:56,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291092153] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:24:56,223 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 15:24:56,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-11-22 15:24:56,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499474758] [2021-11-22 15:24:56,223 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 15:24:56,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-22 15:24:56,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:24:56,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-22 15:24:56,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-11-22 15:24:56,225 INFO L87 Difference]: Start difference. First operand 65 states and 75 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:24:56,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:24:56,440 INFO L93 Difference]: Finished difference Result 121 states and 137 transitions. [2021-11-22 15:24:56,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-22 15:24:56,441 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 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 [2021-11-22 15:24:56,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:24:56,442 INFO L225 Difference]: With dead ends: 121 [2021-11-22 15:24:56,442 INFO L226 Difference]: Without dead ends: 74 [2021-11-22 15:24:56,443 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-11-22 15:24:56,444 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 72 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-22 15:24:56,444 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 33 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-22 15:24:56,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-11-22 15:24:56,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 60. [2021-11-22 15:24:56,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.1355932203389831) internal successors, (67), 59 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) [2021-11-22 15:24:56,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 67 transitions. [2021-11-22 15:24:56,456 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 67 transitions. Word has length 33 [2021-11-22 15:24:56,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:24:56,456 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 67 transitions. [2021-11-22 15:24:56,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:24:56,456 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 67 transitions. [2021-11-22 15:24:56,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-22 15:24:56,458 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:24:56,458 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:24:56,492 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d6691-dad7-4da2-8ffd-11c52b6da3fa/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-22 15:24:56,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d6691-dad7-4da2-8ffd-11c52b6da3fa/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:24:56,672 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:24:56,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:24:56,672 INFO L85 PathProgramCache]: Analyzing trace with hash 236928956, now seen corresponding path program 6 times [2021-11-22 15:24:56,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:24:56,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516008852] [2021-11-22 15:24:56,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:24:56,673 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:24:56,692 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 15:24:56,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1360497924] [2021-11-22 15:24:56,692 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-22 15:24:56,692 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:24:56,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d6691-dad7-4da2-8ffd-11c52b6da3fa/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:24:56,695 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d6691-dad7-4da2-8ffd-11c52b6da3fa/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:24:56,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d6691-dad7-4da2-8ffd-11c52b6da3fa/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-22 15:24:56,761 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-11-22 15:24:56,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 15:24:56,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-22 15:24:56,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:24:56,868 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-22 15:24:56,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:24:56,969 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-22 15:24:56,969 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:24:56,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516008852] [2021-11-22 15:24:56,969 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 15:24:56,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360497924] [2021-11-22 15:24:56,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360497924] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:24:56,970 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 15:24:56,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-11-22 15:24:56,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061830344] [2021-11-22 15:24:56,970 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 15:24:56,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-22 15:24:56,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:24:56,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-22 15:24:56,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-11-22 15:24:56,972 INFO L87 Difference]: Start difference. First operand 60 states and 67 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:24:57,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:24:57,166 INFO L93 Difference]: Finished difference Result 69 states and 76 transitions. [2021-11-22 15:24:57,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-22 15:24:57,167 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-11-22 15:24:57,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:24:57,167 INFO L225 Difference]: With dead ends: 69 [2021-11-22 15:24:57,167 INFO L226 Difference]: Without dead ends: 53 [2021-11-22 15:24:57,168 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2021-11-22 15:24:57,169 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 67 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 15:24:57,169 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 26 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 15:24:57,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-11-22 15:24:57,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 40. [2021-11-22 15:24:57,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 39 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:24:57,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2021-11-22 15:24:57,177 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 35 [2021-11-22 15:24:57,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:24:57,177 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2021-11-22 15:24:57,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:24:57,178 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2021-11-22 15:24:57,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-22 15:24:57,179 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:24:57,179 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:24:57,217 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d6691-dad7-4da2-8ffd-11c52b6da3fa/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-22 15:24:57,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d6691-dad7-4da2-8ffd-11c52b6da3fa/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:24:57,396 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:24:57,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:24:57,396 INFO L85 PathProgramCache]: Analyzing trace with hash 315843584, now seen corresponding path program 7 times [2021-11-22 15:24:57,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:24:57,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619212715] [2021-11-22 15:24:57,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:24:57,397 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:24:57,434 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 15:24:57,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [136027844] [2021-11-22 15:24:57,440 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-22 15:24:57,440 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:24:57,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d6691-dad7-4da2-8ffd-11c52b6da3fa/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:24:57,443 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d6691-dad7-4da2-8ffd-11c52b6da3fa/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:24:57,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d6691-dad7-4da2-8ffd-11c52b6da3fa/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-22 15:24:57,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:24:57,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-22 15:24:57,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:24:57,544 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 11 treesize of output 7 [2021-11-22 15:24:57,549 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 10 treesize of output 8 [2021-11-22 15:24:57,574 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 23 treesize of output 22 [2021-11-22 15:24:57,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:24:57,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-11-22 15:24:57,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:24:57,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:24:57,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:24:57,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 44 [2021-11-22 15:24:57,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:24:57,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-22 15:24:57,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:24:57,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:24:57,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 51 [2021-11-22 15:24:58,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:24:58,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:24:58,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:24:58,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:24:58,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:24:58,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-22 15:24:58,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 49 [2021-11-22 15:24:58,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:24:58,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:24:58,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:24:58,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 49 [2021-11-22 15:24:58,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:24:58,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-22 15:24:58,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:24:58,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:24:58,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 54 [2021-11-22 15:24:58,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:24:58,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:24:58,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:24:58,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:24:58,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:24:58,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-22 15:24:58,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 53 [2021-11-22 15:24:58,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:24:58,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:24:58,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:24:58,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 53 [2021-11-22 15:24:58,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:24:58,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-22 15:24:58,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:24:58,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:24:58,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 59 [2021-11-22 15:24:59,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:24:59,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:24:59,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:24:59,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:24:59,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:24:59,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-22 15:24:59,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 56 [2021-11-22 15:24:59,287 INFO L354 Elim1Store]: treesize reduction 114, result has 16.2 percent of original size [2021-11-22 15:24:59,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 54 treesize of output 47 [2021-11-22 15:24:59,436 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-11-22 15:24:59,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 78 treesize of output 54 [2021-11-22 15:24:59,504 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:24:59,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:29:25,863 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:29:25,864 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:29:25,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619212715] [2021-11-22 15:29:25,864 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 15:29:25,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136027844] [2021-11-22 15:29:25,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136027844] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:29:25,865 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 15:29:25,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 55 [2021-11-22 15:29:25,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341430115] [2021-11-22 15:29:25,866 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 15:29:25,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-11-22 15:29:25,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:29:25,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-11-22 15:29:25,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=2727, Unknown=49, NotChecked=0, Total=2970 [2021-11-22 15:29:25,870 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand has 55 states, 55 states have (on average 1.309090909090909) internal successors, (72), 55 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:31:48,261 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-22 15:31:49,794 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-22 15:31:53,260 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-22 15:31:58,510 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-22 15:32:55,174 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-22 15:32:56,900 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-22 15:32:58,450 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-22 15:32:59,507 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-22 15:33:02,498 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-22 15:33:04,549 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-22 15:33:07,952 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-22 15:33:09,662 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-22 15:33:14,558 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.95s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-22 15:33:18,381 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-22 15:33:19,680 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-22 15:33:21,726 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-22 15:34:24,948 WARN L227 SmtUtils]: Spent 8.61s on a formula simplification that was a NOOP. DAG size: 111 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-22 15:34:26,135 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-22 15:34:27,622 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-22 15:34:29,102 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-22 15:34:31,038 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-22 15:34:33,072 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-22 15:34:35,122 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-22 15:34:36,748 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-22 15:34:37,876 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-22 15:34:39,233 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-22 15:34:42,839 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-22 15:34:44,913 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-22 15:34:49,138 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-22 15:34:51,186 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-22 15:34:53,328 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-22 15:34:57,829 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-22 15:35:01,130 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-22 15:35:53,148 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-22 15:35:56,809 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.96s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-22 15:35:59,257 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-22 15:36:01,762 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-22 15:36:03,809 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-22 15:36:07,092 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-22 15:36:08,463 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-22 15:36:13,414 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-22 15:36:49,686 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-22 15:36:52,384 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-22 15:36:56,526 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-22 15:36:58,556 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-22 15:37:00,588 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-22 15:37:03,301 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-22 15:37:05,623 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-22 15:37:08,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:37:08,752 INFO L93 Difference]: Finished difference Result 95 states and 106 transitions. [2021-11-22 15:37:08,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-22 15:37:08,776 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.309090909090909) internal successors, (72), 55 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-11-22 15:37:08,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:37:08,777 INFO L225 Difference]: With dead ends: 95 [2021-11-22 15:37:08,777 INFO L226 Difference]: Without dead ends: 81 [2021-11-22 15:37:08,781 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 801 ImplicationChecksByTransitivity, 579.3s TimeCoverageRelationStatistics Valid=302, Invalid=4439, Unknown=89, NotChecked=0, Total=4830 [2021-11-22 15:37:08,782 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 10 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 1264 mSolverCounterSat, 73 mSolverCounterUnsat, 18 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 138.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 1638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1264 IncrementalHoareTripleChecker+Invalid, 18 IncrementalHoareTripleChecker+Unknown, 283 IncrementalHoareTripleChecker+Unchecked, 147.5s IncrementalHoareTripleChecker+Time [2021-11-22 15:37:08,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 144 Invalid, 1638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1264 Invalid, 18 Unknown, 283 Unchecked, 147.5s Time] [2021-11-22 15:37:08,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-11-22 15:37:08,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 61. [2021-11-22 15:37:08,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.1166666666666667) internal successors, (67), 60 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) [2021-11-22 15:37:08,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 67 transitions. [2021-11-22 15:37:08,802 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 67 transitions. Word has length 39 [2021-11-22 15:37:08,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:37:08,802 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 67 transitions. [2021-11-22 15:37:08,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.309090909090909) internal successors, (72), 55 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:37:08,803 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 67 transitions. [2021-11-22 15:37:08,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-22 15:37:08,805 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:37:08,805 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:37:08,852 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d6691-dad7-4da2-8ffd-11c52b6da3fa/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-22 15:37:09,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d6691-dad7-4da2-8ffd-11c52b6da3fa/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:37:09,032 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:37:09,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:37:09,033 INFO L85 PathProgramCache]: Analyzing trace with hash -1363759742, now seen corresponding path program 8 times [2021-11-22 15:37:09,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:37:09,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518476573] [2021-11-22 15:37:09,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:37:09,033 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:37:09,063 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 15:37:09,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1613813068] [2021-11-22 15:37:09,077 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-22 15:37:09,077 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:37:09,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d6691-dad7-4da2-8ffd-11c52b6da3fa/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:37:09,079 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d6691-dad7-4da2-8ffd-11c52b6da3fa/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:37:09,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d6691-dad7-4da2-8ffd-11c52b6da3fa/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-22 15:37:09,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-22 15:37:09,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 15:37:09,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-22 15:37:09,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:37:09,438 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-22 15:37:09,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:37:09,647 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-22 15:37:09,647 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:37:09,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518476573] [2021-11-22 15:37:09,648 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 15:37:09,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613813068] [2021-11-22 15:37:09,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613813068] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:37:09,648 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 15:37:09,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-11-22 15:37:09,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987198432] [2021-11-22 15:37:09,649 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 15:37:09,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-22 15:37:09,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:37:09,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-22 15:37:09,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-11-22 15:37:09,651 INFO L87 Difference]: Start difference. First operand 61 states and 67 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:37:10,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:37:10,131 INFO L93 Difference]: Finished difference Result 123 states and 134 transitions. [2021-11-22 15:37:10,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-22 15:37:10,132 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-11-22 15:37:10,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:37:10,133 INFO L225 Difference]: With dead ends: 123 [2021-11-22 15:37:10,133 INFO L226 Difference]: Without dead ends: 77 [2021-11-22 15:37:10,134 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2021-11-22 15:37:10,135 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 96 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-22 15:37:10,136 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 36 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-22 15:37:10,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-11-22 15:37:10,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 62. [2021-11-22 15:37:10,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.098360655737705) internal successors, (67), 61 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) [2021-11-22 15:37:10,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 67 transitions. [2021-11-22 15:37:10,153 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 67 transitions. Word has length 41 [2021-11-22 15:37:10,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:37:10,153 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 67 transitions. [2021-11-22 15:37:10,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:37:10,154 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 67 transitions. [2021-11-22 15:37:10,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-22 15:37:10,155 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:37:10,156 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:37:10,186 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d6691-dad7-4da2-8ffd-11c52b6da3fa/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-22 15:37:10,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d6691-dad7-4da2-8ffd-11c52b6da3fa/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-22 15:37:10,364 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:37:10,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:37:10,365 INFO L85 PathProgramCache]: Analyzing trace with hash -702683966, now seen corresponding path program 9 times [2021-11-22 15:37:10,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:37:10,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934312927] [2021-11-22 15:37:10,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:37:10,365 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:37:10,388 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 15:37:10,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1588344057] [2021-11-22 15:37:10,388 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-22 15:37:10,389 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:37:10,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d6691-dad7-4da2-8ffd-11c52b6da3fa/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:37:10,390 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d6691-dad7-4da2-8ffd-11c52b6da3fa/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:37:10,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d6691-dad7-4da2-8ffd-11c52b6da3fa/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-22 15:37:10,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-22 15:37:10,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 15:37:10,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-22 15:37:10,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:37:10,791 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-22 15:37:10,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:37:11,009 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-22 15:37:11,009 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:37:11,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934312927] [2021-11-22 15:37:11,010 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 15:37:11,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588344057] [2021-11-22 15:37:11,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588344057] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:37:11,011 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 15:37:11,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-11-22 15:37:11,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772917073] [2021-11-22 15:37:11,011 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 15:37:11,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-22 15:37:11,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:37:11,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-22 15:37:11,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-11-22 15:37:11,013 INFO L87 Difference]: Start difference. First operand 62 states and 67 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:37:11,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:37:11,503 INFO L93 Difference]: Finished difference Result 71 states and 76 transitions. [2021-11-22 15:37:11,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-22 15:37:11,504 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-11-22 15:37:11,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:37:11,505 INFO L225 Difference]: With dead ends: 71 [2021-11-22 15:37:11,505 INFO L226 Difference]: Without dead ends: 51 [2021-11-22 15:37:11,506 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=149, Invalid=403, Unknown=0, NotChecked=0, Total=552 [2021-11-22 15:37:11,507 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 69 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-22 15:37:11,508 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 33 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-22 15:37:11,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-11-22 15:37:11,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 48. [2021-11-22 15:37:11,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.0851063829787233) internal successors, (51), 47 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:37:11,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 51 transitions. [2021-11-22 15:37:11,520 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 51 transitions. Word has length 41 [2021-11-22 15:37:11,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:37:11,521 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 51 transitions. [2021-11-22 15:37:11,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:37:11,521 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 51 transitions. [2021-11-22 15:37:11,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-22 15:37:11,522 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:37:11,522 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:37:11,564 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d6691-dad7-4da2-8ffd-11c52b6da3fa/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-22 15:37:11,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d6691-dad7-4da2-8ffd-11c52b6da3fa/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-22 15:37:11,748 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:37:11,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:37:11,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1719679608, now seen corresponding path program 10 times [2021-11-22 15:37:11,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:37:11,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815263588] [2021-11-22 15:37:11,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:37:11,749 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:37:11,784 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 15:37:11,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [67957779] [2021-11-22 15:37:11,785 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-22 15:37:11,785 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:37:11,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d6691-dad7-4da2-8ffd-11c52b6da3fa/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:37:11,799 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d6691-dad7-4da2-8ffd-11c52b6da3fa/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:37:11,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d6691-dad7-4da2-8ffd-11c52b6da3fa/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-22 15:37:11,848 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-22 15:37:11,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 15:37:11,850 WARN L261 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 61 conjunts are in the unsatisfiable core [2021-11-22 15:37:11,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:37:11,884 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 11 treesize of output 7 [2021-11-22 15:37:11,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:37:11,963 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 23 treesize of output 22 [2021-11-22 15:37:12,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:37:12,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:37:12,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-11-22 15:37:12,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:37:12,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:37:12,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:37:12,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:37:12,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 44 [2021-11-22 15:37:12,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:37:12,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:37:12,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:37:12,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:37:12,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:37:12,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:37:12,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:37:12,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 54 [2021-11-22 15:37:12,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:37:12,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:37:12,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-22 15:37:12,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:37:12,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:37:12,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:37:12,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:37:12,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:37:12,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 63 [2021-11-22 15:37:12,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:37:12,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:37:12,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:37:12,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:37:12,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:37:12,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:37:12,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:37:12,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:37:12,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-22 15:37:12,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:37:12,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 66 [2021-11-22 15:37:13,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:37:13,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:37:13,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:37:13,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:37:13,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:37:13,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-22 15:37:13,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:37:13,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:37:13,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:37:13,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 63 [2021-11-22 15:37:13,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:37:13,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:37:13,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:37:13,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:37:13,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:37:13,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:37:13,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:37:13,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 62 [2021-11-22 15:37:13,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:37:13,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:37:13,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-22 15:37:13,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:37:13,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:37:13,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:37:13,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:37:13,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:37:13,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 63 [2021-11-22 15:37:14,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:37:14,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:37:14,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:37:14,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:37:14,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:37:14,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:37:14,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:37:14,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:37:14,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-22 15:37:14,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:37:14,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 68 [2021-11-22 15:37:14,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:37:14,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:37:14,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:37:14,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:37:14,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:37:14,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-22 15:37:14,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:37:14,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:37:14,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:37:14,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 65 [2021-11-22 15:37:14,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:37:14,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:37:14,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:37:14,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:37:14,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:37:14,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:37:14,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:37:14,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:37:14,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:37:14,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-22 15:37:14,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 61 [2021-11-22 15:37:15,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:37:15,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:37:15,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-22 15:37:15,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:37:15,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:37:15,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:37:15,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:37:15,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:37:15,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 63 [2021-11-22 15:37:15,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:37:15,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:37:15,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:37:15,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:37:15,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:37:15,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:37:15,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:37:15,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:37:15,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-22 15:37:15,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:37:15,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 61 [2021-11-22 15:37:15,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:37:15,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:37:15,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:37:15,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:37:15,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:37:15,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-22 15:37:15,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:37:15,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:37:15,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 15:37:15,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 63 [2021-11-22 15:37:16,254 INFO L354 Elim1Store]: treesize reduction 152, result has 16.0 percent of original size [2021-11-22 15:37:16,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 62 treesize of output 58 [2021-11-22 15:37:16,531 INFO L354 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2021-11-22 15:37:16,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 92 treesize of output 60 [2021-11-22 15:37:16,661 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:37:16,661 INFO L328 TraceCheckSpWp]: Computing backward predicates...