./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/ss4.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db4a074-75c1-46ae-868e-08dac4c62d63/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db4a074-75c1-46ae-868e-08dac4c62d63/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db4a074-75c1-46ae-868e-08dac4c62d63/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db4a074-75c1-46ae-868e-08dac4c62d63/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-fpi/ss4.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db4a074-75c1-46ae-868e-08dac4c62d63/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db4a074-75c1-46ae-868e-08dac4c62d63/bin/uautomizer-DrprNOufMa --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 cb671fec0d42514b04873418e954f5a2df95ef7f393045434a478c03667a31d2 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 23:14:14,372 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 23:14:14,374 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 23:14:14,406 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 23:14:14,406 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 23:14:14,408 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 23:14:14,409 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 23:14:14,412 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 23:14:14,414 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 23:14:14,415 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 23:14:14,416 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 23:14:14,418 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 23:14:14,418 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 23:14:14,419 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 23:14:14,421 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 23:14:14,422 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 23:14:14,424 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 23:14:14,425 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 23:14:14,427 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 23:14:14,429 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 23:14:14,431 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 23:14:14,433 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 23:14:14,434 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 23:14:14,435 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 23:14:14,438 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 23:14:14,439 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 23:14:14,439 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 23:14:14,440 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 23:14:14,441 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 23:14:14,442 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 23:14:14,442 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 23:14:14,443 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 23:14:14,444 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 23:14:14,445 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 23:14:14,446 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 23:14:14,446 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 23:14:14,447 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 23:14:14,447 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 23:14:14,447 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 23:14:14,448 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 23:14:14,449 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 23:14:14,449 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db4a074-75c1-46ae-868e-08dac4c62d63/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 23:14:14,469 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 23:14:14,469 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 23:14:14,469 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 23:14:14,469 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 23:14:14,470 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 23:14:14,470 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 23:14:14,471 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 23:14:14,471 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 23:14:14,471 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 23:14:14,471 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 23:14:14,471 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 23:14:14,471 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 23:14:14,471 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 23:14:14,472 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 23:14:14,472 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 23:14:14,472 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 23:14:14,472 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 23:14:14,472 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 23:14:14,472 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 23:14:14,472 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 23:14:14,473 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 23:14:14,473 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 23:14:14,473 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 23:14:14,473 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 23:14:14,473 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 23:14:14,473 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 23:14:14,474 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 23:14:14,474 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 23:14:14,474 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 23:14:14,474 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 23:14:14,474 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 23:14:14,474 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 23:14:14,474 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 23:14:14,474 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 23:14:14,475 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_2db4a074-75c1-46ae-868e-08dac4c62d63/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db4a074-75c1-46ae-868e-08dac4c62d63/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cb671fec0d42514b04873418e954f5a2df95ef7f393045434a478c03667a31d2 [2021-12-06 23:14:14,649 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 23:14:14,665 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 23:14:14,666 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 23:14:14,667 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 23:14:14,668 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 23:14:14,669 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db4a074-75c1-46ae-868e-08dac4c62d63/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/array-fpi/ss4.c [2021-12-06 23:14:14,722 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db4a074-75c1-46ae-868e-08dac4c62d63/bin/uautomizer-DrprNOufMa/data/48e14c5da/52a7fe170e2046329e8de5c0cf511926/FLAG2ba916251 [2021-12-06 23:14:15,078 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 23:14:15,078 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db4a074-75c1-46ae-868e-08dac4c62d63/sv-benchmarks/c/array-fpi/ss4.c [2021-12-06 23:14:15,084 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db4a074-75c1-46ae-868e-08dac4c62d63/bin/uautomizer-DrprNOufMa/data/48e14c5da/52a7fe170e2046329e8de5c0cf511926/FLAG2ba916251 [2021-12-06 23:14:15,093 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db4a074-75c1-46ae-868e-08dac4c62d63/bin/uautomizer-DrprNOufMa/data/48e14c5da/52a7fe170e2046329e8de5c0cf511926 [2021-12-06 23:14:15,096 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 23:14:15,097 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 23:14:15,098 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 23:14:15,098 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 23:14:15,101 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 23:14:15,101 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 11:14:15" (1/1) ... [2021-12-06 23:14:15,102 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c4d5348 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:14:15, skipping insertion in model container [2021-12-06 23:14:15,102 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 11:14:15" (1/1) ... [2021-12-06 23:14:15,107 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 23:14:15,118 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 23:14:15,241 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_2db4a074-75c1-46ae-868e-08dac4c62d63/sv-benchmarks/c/array-fpi/ss4.c[586,599] [2021-12-06 23:14:15,255 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 23:14:15,263 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 23:14:15,272 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_2db4a074-75c1-46ae-868e-08dac4c62d63/sv-benchmarks/c/array-fpi/ss4.c[586,599] [2021-12-06 23:14:15,279 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 23:14:15,289 INFO L208 MainTranslator]: Completed translation [2021-12-06 23:14:15,289 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:14:15 WrapperNode [2021-12-06 23:14:15,289 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 23:14:15,290 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 23:14:15,290 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 23:14:15,290 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 23:14:15,295 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:14:15" (1/1) ... [2021-12-06 23:14:15,301 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:14:15" (1/1) ... [2021-12-06 23:14:15,316 INFO L137 Inliner]: procedures = 17, calls = 32, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 96 [2021-12-06 23:14:15,316 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 23:14:15,317 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 23:14:15,317 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 23:14:15,317 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 23:14:15,323 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:14:15" (1/1) ... [2021-12-06 23:14:15,323 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:14:15" (1/1) ... [2021-12-06 23:14:15,325 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:14:15" (1/1) ... [2021-12-06 23:14:15,325 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:14:15" (1/1) ... [2021-12-06 23:14:15,330 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:14:15" (1/1) ... [2021-12-06 23:14:15,333 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:14:15" (1/1) ... [2021-12-06 23:14:15,334 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:14:15" (1/1) ... [2021-12-06 23:14:15,336 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 23:14:15,337 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 23:14:15,337 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 23:14:15,337 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 23:14:15,338 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:14:15" (1/1) ... [2021-12-06 23:14:15,343 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 23:14:15,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db4a074-75c1-46ae-868e-08dac4c62d63/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:14:15,360 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db4a074-75c1-46ae-868e-08dac4c62d63/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 23:14:15,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db4a074-75c1-46ae-868e-08dac4c62d63/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 23:14:15,397 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 23:14:15,398 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 23:14:15,398 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-06 23:14:15,398 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-06 23:14:15,398 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-06 23:14:15,398 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 23:14:15,398 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 23:14:15,399 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-06 23:14:15,399 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-06 23:14:15,450 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 23:14:15,452 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 23:14:15,549 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 23:14:15,554 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 23:14:15,554 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-12-06 23:14:15,555 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 11:14:15 BoogieIcfgContainer [2021-12-06 23:14:15,555 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 23:14:15,557 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 23:14:15,557 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 23:14:15,559 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 23:14:15,559 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 11:14:15" (1/3) ... [2021-12-06 23:14:15,560 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7986fa30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 11:14:15, skipping insertion in model container [2021-12-06 23:14:15,560 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:14:15" (2/3) ... [2021-12-06 23:14:15,561 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7986fa30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 11:14:15, skipping insertion in model container [2021-12-06 23:14:15,561 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 11:14:15" (3/3) ... [2021-12-06 23:14:15,562 INFO L111 eAbstractionObserver]: Analyzing ICFG ss4.c [2021-12-06 23:14:15,566 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 23:14:15,566 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 23:14:15,603 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 23:14:15,609 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 [2021-12-06 23:14:15,609 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 23:14:15,619 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) [2021-12-06 23:14:15,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-06 23:14:15,623 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:14:15,624 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:14:15,624 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:14:15,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:14:15,630 INFO L85 PathProgramCache]: Analyzing trace with hash -1202110748, now seen corresponding path program 1 times [2021-12-06 23:14:15,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:14:15,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148672025] [2021-12-06 23:14:15,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:14:15,638 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:14:15,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:14:15,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:14:15,780 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:14:15,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148672025] [2021-12-06 23:14:15,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148672025] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:14:15,781 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:14:15,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 23:14:15,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651551326] [2021-12-06 23:14:15,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:14:15,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-06 23:14:15,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:14:15,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-06 23:14:15,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 23:14:15,812 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) [2021-12-06 23:14:15,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:14:15,829 INFO L93 Difference]: Finished difference Result 44 states and 62 transitions. [2021-12-06 23:14:15,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 23:14:15,831 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 [2021-12-06 23:14:15,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:14:15,837 INFO L225 Difference]: With dead ends: 44 [2021-12-06 23:14:15,837 INFO L226 Difference]: Without dead ends: 20 [2021-12-06 23:14:15,839 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 [2021-12-06 23:14:15,842 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 [2021-12-06 23:14:15,843 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] [2021-12-06 23:14:15,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-12-06 23:14:15,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-12-06 23:14:15,869 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) [2021-12-06 23:14:15,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2021-12-06 23:14:15,870 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 15 [2021-12-06 23:14:15,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:14:15,870 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2021-12-06 23:14:15,871 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) [2021-12-06 23:14:15,871 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2021-12-06 23:14:15,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-06 23:14:15,871 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:14:15,871 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:14:15,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 23:14:15,872 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:14:15,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:14:15,872 INFO L85 PathProgramCache]: Analyzing trace with hash -944124056, now seen corresponding path program 1 times [2021-12-06 23:14:15,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:14:15,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215985566] [2021-12-06 23:14:15,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:14:15,873 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:14:15,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:14:15,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:14:15,949 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:14:15,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215985566] [2021-12-06 23:14:15,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215985566] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:14:15,950 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:14:15,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 23:14:15,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852339023] [2021-12-06 23:14:15,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:14:15,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 23:14:15,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:14:15,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 23:14:15,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 23:14:15,953 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) [2021-12-06 23:14:16,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:14:16,006 INFO L93 Difference]: Finished difference Result 41 states and 50 transitions. [2021-12-06 23:14:16,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 23:14:16,007 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 [2021-12-06 23:14:16,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:14:16,007 INFO L225 Difference]: With dead ends: 41 [2021-12-06 23:14:16,007 INFO L226 Difference]: Without dead ends: 28 [2021-12-06 23:14:16,008 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 [2021-12-06 23:14:16,009 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:14:16,009 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 12 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:14:16,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-12-06 23:14:16,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2021-12-06 23:14:16,013 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) [2021-12-06 23:14:16,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-12-06 23:14:16,014 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 15 [2021-12-06 23:14:16,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:14:16,014 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-12-06 23:14:16,015 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) [2021-12-06 23:14:16,015 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-12-06 23:14:16,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-06 23:14:16,015 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:14:16,015 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] [2021-12-06 23:14:16,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 23:14:16,016 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:14:16,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:14:16,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1401448688, now seen corresponding path program 1 times [2021-12-06 23:14:16,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:14:16,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807142154] [2021-12-06 23:14:16,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:14:16,017 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:14:16,043 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 23:14:16,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1336666461] [2021-12-06 23:14:16,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:14:16,044 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:14:16,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db4a074-75c1-46ae-868e-08dac4c62d63/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:14:16,045 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db4a074-75c1-46ae-868e-08dac4c62d63/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:14:16,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db4a074-75c1-46ae-868e-08dac4c62d63/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 23:14:16,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:14:16,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 48 conjunts are in the unsatisfiable core [2021-12-06 23:14:16,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:14:16,189 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 [2021-12-06 23:14:16,197 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 [2021-12-06 23:14:16,229 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 [2021-12-06 23:14:16,371 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 [2021-12-06 23:14:16,464 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 [2021-12-06 23:14:16,529 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 32 treesize of output 23 [2021-12-06 23:14:16,572 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 [2021-12-06 23:14:16,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 31 [2021-12-06 23:14:16,697 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:14:16,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:14:17,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:14:17,287 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:14:17,287 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:14:17,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807142154] [2021-12-06 23:14:17,287 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 23:14:17,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336666461] [2021-12-06 23:14:17,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336666461] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:14:17,288 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 23:14:17,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-12-06 23:14:17,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695835197] [2021-12-06 23:14:17,288 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 23:14:17,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-06 23:14:17,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:14:17,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-06 23:14:17,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2021-12-06 23:14:17,290 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) [2021-12-06 23:14:18,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:14:18,023 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2021-12-06 23:14:18,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-06 23:14:18,024 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 [2021-12-06 23:14:18,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:14:18,024 INFO L225 Difference]: With dead ends: 44 [2021-12-06 23:14:18,024 INFO L226 Difference]: Without dead ends: 40 [2021-12-06 23:14:18,025 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=155, Invalid=715, Unknown=0, NotChecked=0, Total=870 [2021-12-06 23:14:18,026 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 16 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 23:14:18,027 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 70 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 271 Invalid, 0 Unknown, 4 Unchecked, 0.4s Time] [2021-12-06 23:14:18,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-12-06 23:14:18,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2021-12-06 23:14:18,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 36 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) [2021-12-06 23:14:18,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2021-12-06 23:14:18,032 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 23 [2021-12-06 23:14:18,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:14:18,032 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2021-12-06 23:14:18,033 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) [2021-12-06 23:14:18,033 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2021-12-06 23:14:18,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-06 23:14:18,033 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:14:18,034 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] [2021-12-06 23:14:18,054 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db4a074-75c1-46ae-868e-08dac4c62d63/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 23:14:18,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db4a074-75c1-46ae-868e-08dac4c62d63/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:14:18,236 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:14:18,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:14:18,238 INFO L85 PathProgramCache]: Analyzing trace with hash -1774307726, now seen corresponding path program 2 times [2021-12-06 23:14:18,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:14:18,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419167029] [2021-12-06 23:14:18,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:14:18,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:14:18,293 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 23:14:18,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1321495455] [2021-12-06 23:14:18,293 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 23:14:18,293 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:14:18,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db4a074-75c1-46ae-868e-08dac4c62d63/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:14:18,294 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db4a074-75c1-46ae-868e-08dac4c62d63/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:14:18,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db4a074-75c1-46ae-868e-08dac4c62d63/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 23:14:18,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 23:14:18,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:14:18,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 23:14:18,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:14:18,374 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 23:14:18,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:14:18,404 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 23:14:18,404 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:14:18,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419167029] [2021-12-06 23:14:18,404 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 23:14:18,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321495455] [2021-12-06 23:14:18,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321495455] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:14:18,404 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 23:14:18,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-12-06 23:14:18,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768985194] [2021-12-06 23:14:18,405 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 23:14:18,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 23:14:18,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:14:18,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 23:14:18,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-12-06 23:14:18,406 INFO L87 Difference]: Start difference. First operand 37 states and 43 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) [2021-12-06 23:14:18,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:14:18,495 INFO L93 Difference]: Finished difference Result 79 states and 90 transitions. [2021-12-06 23:14:18,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 23:14:18,495 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 [2021-12-06 23:14:18,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:14:18,496 INFO L225 Difference]: With dead ends: 79 [2021-12-06 23:14:18,496 INFO L226 Difference]: Without dead ends: 53 [2021-12-06 23:14:18,497 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-12-06 23:14:18,498 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 56 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:14:18,499 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 32 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 23:14:18,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-12-06 23:14:18,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 38. [2021-12-06 23:14:18,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.162162162162162) internal successors, (43), 37 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) [2021-12-06 23:14:18,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2021-12-06 23:14:18,505 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 25 [2021-12-06 23:14:18,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:14:18,506 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2021-12-06 23:14:18,506 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) [2021-12-06 23:14:18,506 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2021-12-06 23:14:18,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-06 23:14:18,507 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:14:18,507 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] [2021-12-06 23:14:18,527 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db4a074-75c1-46ae-868e-08dac4c62d63/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 23:14:18,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db4a074-75c1-46ae-868e-08dac4c62d63/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-12-06 23:14:18,709 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:14:18,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:14:18,711 INFO L85 PathProgramCache]: Analyzing trace with hash 119582130, now seen corresponding path program 3 times [2021-12-06 23:14:18,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:14:18,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781405795] [2021-12-06 23:14:18,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:14:18,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:14:18,759 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 23:14:18,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [827602098] [2021-12-06 23:14:18,760 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 23:14:18,760 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:14:18,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db4a074-75c1-46ae-868e-08dac4c62d63/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:14:18,761 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db4a074-75c1-46ae-868e-08dac4c62d63/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:14:18,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db4a074-75c1-46ae-868e-08dac4c62d63/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 23:14:18,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-06 23:14:18,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:14:18,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 23:14:18,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:14:18,854 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 23:14:18,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:14:18,884 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 23:14:18,884 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:14:18,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781405795] [2021-12-06 23:14:18,884 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 23:14:18,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827602098] [2021-12-06 23:14:18,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827602098] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:14:18,885 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 23:14:18,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-12-06 23:14:18,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047540480] [2021-12-06 23:14:18,885 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 23:14:18,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 23:14:18,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:14:18,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 23:14:18,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-12-06 23:14:18,886 INFO L87 Difference]: Start difference. First operand 38 states and 43 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) [2021-12-06 23:14:18,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:14:18,968 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2021-12-06 23:14:18,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 23:14:18,969 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 [2021-12-06 23:14:18,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:14:18,969 INFO L225 Difference]: With dead ends: 47 [2021-12-06 23:14:18,969 INFO L226 Difference]: Without dead ends: 35 [2021-12-06 23:14:18,970 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-12-06 23:14:18,970 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 43 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:14:18,971 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 23 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 23:14:18,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-12-06 23:14:18,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2021-12-06 23:14:18,974 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) [2021-12-06 23:14:18,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2021-12-06 23:14:18,974 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 25 [2021-12-06 23:14:18,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:14:18,975 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2021-12-06 23:14:18,975 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) [2021-12-06 23:14:18,975 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2021-12-06 23:14:18,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-06 23:14:18,975 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:14:18,976 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] [2021-12-06 23:14:19,007 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db4a074-75c1-46ae-868e-08dac4c62d63/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 23:14:19,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db4a074-75c1-46ae-868e-08dac4c62d63/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:14:19,176 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:14:19,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:14:19,177 INFO L85 PathProgramCache]: Analyzing trace with hash 666081912, now seen corresponding path program 4 times [2021-12-06 23:14:19,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:14:19,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152174674] [2021-12-06 23:14:19,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:14:19,177 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:14:19,195 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 23:14:19,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1856567802] [2021-12-06 23:14:19,195 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 23:14:19,195 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:14:19,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db4a074-75c1-46ae-868e-08dac4c62d63/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:14:19,196 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db4a074-75c1-46ae-868e-08dac4c62d63/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:14:19,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db4a074-75c1-46ae-868e-08dac4c62d63/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 23:14:19,231 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 23:14:19,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:14:19,232 WARN L261 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 68 conjunts are in the unsatisfiable core [2021-12-06 23:14:19,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:14:19,249 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 [2021-12-06 23:14:19,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:14:19,266 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 [2021-12-06 23:14:19,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:14:19,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:14:19,301 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 [2021-12-06 23:14:19,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:14:19,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:14:19,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:14:19,368 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 [2021-12-06 23:14:19,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:14:19,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:14:19,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:14:19,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:14:19,422 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 53 treesize of output 37 [2021-12-06 23:14:19,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:14:19,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:14:19,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:14:19,586 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 73 treesize of output 43 [2021-12-06 23:14:19,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:14:19,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:14:19,683 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 57 treesize of output 39 [2021-12-06 23:14:19,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:14:19,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:14:19,763 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 39 [2021-12-06 23:14:19,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:14:19,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:14:19,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:14:19,814 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 [2021-12-06 23:14:19,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:14:19,904 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 47 treesize of output 33 [2021-12-06 23:14:19,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:14:19,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 36 [2021-12-06 23:14:20,020 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:14:20,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:14:41,011 WARN L838 $PredicateComparison]: unable to prove that (forall ((~N~0 Int)) (or (= (+ ~N~0 (* ~N~0 ~N~0)) (let ((.cse3 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 8))) (let ((.cse1 (let ((.cse12 (let ((.cse13 (* |c_ULTIMATE.start_main_~i~0#1| 8))) (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse13) 1) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse13 8) 1)))) (let ((.cse10 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse12))) (let ((.cse11 (select .cse10 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse7 (select .cse11 |c_ULTIMATE.start_main_~#sum~0#1.offset|)) (.cse8 (select .cse12 |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse9 (select (select (store .cse10 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse11 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse7 .cse8))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse3))) (let ((.cse4 (store .cse10 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse11 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse7 .cse8 .cse9))))) (store .cse4 |c_ULTIMATE.start_main_~a~0#1.base| (let ((.cse5 (let ((.cse6 (select .cse4 |c_ULTIMATE.start_main_~a~0#1.base|))) (store .cse6 |c_ULTIMATE.start_main_~a~0#1.offset| (+ (select .cse6 |c_ULTIMATE.start_main_~a~0#1.offset|) .cse7 .cse8 .cse9))))) (store .cse5 .cse3 (+ (select (select (store .cse4 |c_ULTIMATE.start_main_~a~0#1.base| .cse5) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) (select .cse5 .cse3))))))))))))) (let ((.cse2 (select .cse1 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse0 (select (select (store .cse1 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse2 |c_ULTIMATE.start_main_~#sum~0#1.offset| 0)) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (+ .cse0 (select (select (store .cse1 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse2 |c_ULTIMATE.start_main_~#sum~0#1.offset| .cse0)) |c_ULTIMATE.start_main_~a~0#1.base|) .cse3))))))) (< 2 ~N~0) (<= ~N~0 (+ |c_ULTIMATE.start_main_~i~0#1| 1)))) is different from false [2021-12-06 23:14:41,063 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2021-12-06 23:14:41,063 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:14:41,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152174674] [2021-12-06 23:14:41,063 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 23:14:41,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856567802] [2021-12-06 23:14:41,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856567802] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:14:41,063 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 23:14:41,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 39 [2021-12-06 23:14:41,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435218490] [2021-12-06 23:14:41,064 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 23:14:41,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-06 23:14:41,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:14:41,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-06 23:14:41,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1257, Unknown=5, NotChecked=72, Total=1482 [2021-12-06 23:14:41,065 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) [2021-12-06 23:14:55,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:14:55,020 INFO L93 Difference]: Finished difference Result 63 states and 71 transitions. [2021-12-06 23:14:55,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-06 23:14:55,021 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 [2021-12-06 23:14:55,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:14:55,021 INFO L225 Difference]: With dead ends: 63 [2021-12-06 23:14:55,021 INFO L226 Difference]: Without dead ends: 51 [2021-12-06 23:14:55,022 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 32.0s TimeCoverageRelationStatistics Valid=227, Invalid=2028, Unknown=5, NotChecked=92, Total=2352 [2021-12-06 23:14:55,023 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 5 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 129 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-06 23:14:55,023 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 99 Invalid, 765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 578 Invalid, 0 Unknown, 129 Unchecked, 2.8s Time] [2021-12-06 23:14:55,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-12-06 23:14:55,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 43. [2021-12-06 23:14:55,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.1428571428571428) internal successors, (48), 42 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:14:55,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2021-12-06 23:14:55,029 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 31 [2021-12-06 23:14:55,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:14:55,029 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2021-12-06 23:14:55,029 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) [2021-12-06 23:14:55,029 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2021-12-06 23:14:55,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-06 23:14:55,030 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:14:55,030 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] [2021-12-06 23:14:55,049 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db4a074-75c1-46ae-868e-08dac4c62d63/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-06 23:14:55,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db4a074-75c1-46ae-868e-08dac4c62d63/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:14:55,232 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:14:55,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:14:55,233 INFO L85 PathProgramCache]: Analyzing trace with hash 207824378, now seen corresponding path program 5 times [2021-12-06 23:14:55,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:14:55,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549105453] [2021-12-06 23:14:55,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:14:55,235 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:14:55,285 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 23:14:55,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1068130059] [2021-12-06 23:14:55,286 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 23:14:55,286 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:14:55,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db4a074-75c1-46ae-868e-08dac4c62d63/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:14:55,287 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db4a074-75c1-46ae-868e-08dac4c62d63/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:14:55,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db4a074-75c1-46ae-868e-08dac4c62d63/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 23:14:55,363 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-12-06 23:14:55,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:14:55,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-06 23:14:55,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:14:55,433 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-06 23:14:55,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:14:55,486 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-06 23:14:55,486 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:14:55,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549105453] [2021-12-06 23:14:55,486 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 23:14:55,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068130059] [2021-12-06 23:14:55,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068130059] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:14:55,486 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 23:14:55,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-12-06 23:14:55,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006383463] [2021-12-06 23:14:55,486 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 23:14:55,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-06 23:14:55,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:14:55,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-06 23:14:55,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-12-06 23:14:55,487 INFO L87 Difference]: Start difference. First operand 43 states and 48 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) [2021-12-06 23:14:55,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:14:55,613 INFO L93 Difference]: Finished difference Result 95 states and 105 transitions. [2021-12-06 23:14:55,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 23:14:55,613 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 [2021-12-06 23:14:55,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:14:55,614 INFO L225 Difference]: With dead ends: 95 [2021-12-06 23:14:55,614 INFO L226 Difference]: Without dead ends: 58 [2021-12-06 23:14:55,615 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 [2021-12-06 23:14:55,616 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 86 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:14:55,616 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 30 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 23:14:55,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-12-06 23:14:55,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 44. [2021-12-06 23:14:55,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.1162790697674418) internal successors, (48), 43 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:14:55,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2021-12-06 23:14:55,624 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 33 [2021-12-06 23:14:55,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:14:55,624 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2021-12-06 23:14:55,625 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) [2021-12-06 23:14:55,625 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2021-12-06 23:14:55,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-06 23:14:55,626 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:14:55,626 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] [2021-12-06 23:14:55,652 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db4a074-75c1-46ae-868e-08dac4c62d63/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 23:14:55,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db4a074-75c1-46ae-868e-08dac4c62d63/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:14:55,827 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:14:55,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:14:55,828 INFO L85 PathProgramCache]: Analyzing trace with hash 236928956, now seen corresponding path program 6 times [2021-12-06 23:14:55,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:14:55,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508330455] [2021-12-06 23:14:55,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:14:55,828 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:14:55,878 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 23:14:55,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1624526286] [2021-12-06 23:14:55,878 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 23:14:55,879 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:14:55,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db4a074-75c1-46ae-868e-08dac4c62d63/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:14:55,879 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db4a074-75c1-46ae-868e-08dac4c62d63/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:14:55,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db4a074-75c1-46ae-868e-08dac4c62d63/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 23:14:55,931 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-12-06 23:14:55,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:14:55,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-06 23:14:55,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:14:55,992 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-06 23:14:55,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:14:56,040 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-06 23:14:56,040 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:14:56,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508330455] [2021-12-06 23:14:56,041 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 23:14:56,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624526286] [2021-12-06 23:14:56,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624526286] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:14:56,041 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 23:14:56,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-12-06 23:14:56,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537469796] [2021-12-06 23:14:56,041 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 23:14:56,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-06 23:14:56,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:14:56,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-06 23:14:56,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-12-06 23:14:56,042 INFO L87 Difference]: Start difference. First operand 44 states and 48 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) [2021-12-06 23:14:56,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:14:56,161 INFO L93 Difference]: Finished difference Result 53 states and 57 transitions. [2021-12-06 23:14:56,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-06 23:14:56,161 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 [2021-12-06 23:14:56,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:14:56,162 INFO L225 Difference]: With dead ends: 53 [2021-12-06 23:14:56,162 INFO L226 Difference]: Without dead ends: 43 [2021-12-06 23:14:56,162 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2021-12-06 23:14:56,162 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 79 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:14:56,163 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 19 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 23:14:56,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-12-06 23:14:56,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2021-12-06 23:14:56,166 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) [2021-12-06 23:14:56,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2021-12-06 23:14:56,167 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 35 [2021-12-06 23:14:56,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:14:56,167 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2021-12-06 23:14:56,167 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) [2021-12-06 23:14:56,167 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2021-12-06 23:14:56,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-06 23:14:56,168 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:14:56,168 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] [2021-12-06 23:14:56,188 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db4a074-75c1-46ae-868e-08dac4c62d63/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-06 23:14:56,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db4a074-75c1-46ae-868e-08dac4c62d63/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-12-06 23:14:56,370 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:14:56,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:14:56,371 INFO L85 PathProgramCache]: Analyzing trace with hash 315843584, now seen corresponding path program 7 times [2021-12-06 23:14:56,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:14:56,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589042909] [2021-12-06 23:14:56,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:14:56,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:14:56,427 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 23:14:56,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1177602011] [2021-12-06 23:14:56,427 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 23:14:56,427 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:14:56,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db4a074-75c1-46ae-868e-08dac4c62d63/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:14:56,428 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db4a074-75c1-46ae-868e-08dac4c62d63/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:14:56,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db4a074-75c1-46ae-868e-08dac4c62d63/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 23:14:56,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:14:56,489 WARN L261 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 94 conjunts are in the unsatisfiable core [2021-12-06 23:14:56,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:14:56,503 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 [2021-12-06 23:14:56,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 23:14:56,519 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 [2021-12-06 23:14:56,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:14:56,552 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 [2021-12-06 23:14:56,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:14:56,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:14:56,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:14:56,605 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 42 treesize of output 47 [2021-12-06 23:14:56,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:14:56,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:14:56,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:14:56,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:14:56,727 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 [2021-12-06 23:14:56,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:14:56,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:14:56,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:14:56,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:14:56,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:14:56,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:14:56,804 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 63 treesize of output 54 [2021-12-06 23:14:56,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:14:56,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:14:56,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:14:56,889 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 [2021-12-06 23:14:56,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:14:56,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:14:56,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:14:56,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:14:56,996 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 62 treesize of output 51 [2021-12-06 23:14:57,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:14:57,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:14:57,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:14:57,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:14:57,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:14:57,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:14:57,094 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 68 treesize of output 51 [2021-12-06 23:14:57,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:14:57,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:14:57,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:14:57,199 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 72 treesize of output 49 [2021-12-06 23:14:57,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:14:57,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:14:57,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:14:57,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 47 [2021-12-06 23:14:57,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:14:57,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:14:57,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:14:57,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:14:57,332 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 [2021-12-06 23:14:57,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:14:57,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:14:57,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:14:57,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:14:57,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:14:57,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:14:57,446 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 72 treesize of output 54 [2021-12-06 23:14:57,563 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 50 treesize of output 43 [2021-12-06 23:14:57,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 39 [2021-12-06 23:14:57,713 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:14:57,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:18:46,122 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:18:46,123 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:18:46,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589042909] [2021-12-06 23:18:46,123 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 23:18:46,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177602011] [2021-12-06 23:18:46,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177602011] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:18:46,123 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 23:18:46,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 55 [2021-12-06 23:18:46,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031345172] [2021-12-06 23:18:46,123 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 23:18:46,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-12-06 23:18:46,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:18:46,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-12-06 23:18:46,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=2727, Unknown=36, NotChecked=0, Total=2970 [2021-12-06 23:18:46,125 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) [2021-12-06 23:20:16,297 WARN L227 SmtUtils]: Spent 6.07s on a formula simplification. DAG size of input: 148 DAG size of output: 58 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 23:21:22,057 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.75s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-12-06 23:21:31,644 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 [] [2021-12-06 23:21:32,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:21:32,462 INFO L93 Difference]: Finished difference Result 88 states and 98 transitions. [2021-12-06 23:21:32,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-12-06 23:21:32,463 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 [2021-12-06 23:21:32,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:21:32,464 INFO L225 Difference]: With dead ends: 88 [2021-12-06 23:21:32,464 INFO L226 Difference]: Without dead ends: 74 [2021-12-06 23:21:32,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 725 ImplicationChecksByTransitivity, 365.6s TimeCoverageRelationStatistics Valid=294, Invalid=3946, Unknown=50, NotChecked=0, Total=4290 [2021-12-06 23:21:32,466 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 9 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 1127 mSolverCounterSat, 86 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 1483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 1127 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 269 IncrementalHoareTripleChecker+Unchecked, 27.3s IncrementalHoareTripleChecker+Time [2021-12-06 23:21:32,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 132 Invalid, 1483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 1127 Invalid, 1 Unknown, 269 Unchecked, 27.3s Time] [2021-12-06 23:21:32,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-12-06 23:21:32,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 61. [2021-12-06 23:21:32,472 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) [2021-12-06 23:21:32,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 67 transitions. [2021-12-06 23:21:32,473 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 67 transitions. Word has length 39 [2021-12-06 23:21:32,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:21:32,473 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 67 transitions. [2021-12-06 23:21:32,473 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) [2021-12-06 23:21:32,474 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 67 transitions. [2021-12-06 23:21:32,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-06 23:21:32,474 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:21:32,474 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] [2021-12-06 23:21:32,504 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db4a074-75c1-46ae-868e-08dac4c62d63/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-06 23:21:32,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db4a074-75c1-46ae-868e-08dac4c62d63/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:21:32,676 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:21:32,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:21:32,677 INFO L85 PathProgramCache]: Analyzing trace with hash -1363759742, now seen corresponding path program 8 times [2021-12-06 23:21:32,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:21:32,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772310029] [2021-12-06 23:21:32,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:21:32,678 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:21:32,727 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 23:21:32,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [417193868] [2021-12-06 23:21:32,727 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 23:21:32,727 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:21:32,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db4a074-75c1-46ae-868e-08dac4c62d63/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:21:32,728 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db4a074-75c1-46ae-868e-08dac4c62d63/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:21:32,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db4a074-75c1-46ae-868e-08dac4c62d63/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-06 23:21:32,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 23:21:32,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:21:32,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-06 23:21:32,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:21:32,884 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-06 23:21:32,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:21:32,964 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-06 23:21:32,964 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:21:32,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772310029] [2021-12-06 23:21:32,964 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 23:21:32,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417193868] [2021-12-06 23:21:32,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417193868] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:21:32,964 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 23:21:32,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-12-06 23:21:32,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284962408] [2021-12-06 23:21:32,965 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 23:21:32,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-06 23:21:32,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:21:32,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-06 23:21:32,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-12-06 23:21:32,966 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) [2021-12-06 23:21:33,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:21:33,172 INFO L93 Difference]: Finished difference Result 123 states and 134 transitions. [2021-12-06 23:21:33,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-06 23:21:33,172 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 [2021-12-06 23:21:33,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:21:33,173 INFO L225 Difference]: With dead ends: 123 [2021-12-06 23:21:33,173 INFO L226 Difference]: Without dead ends: 77 [2021-12-06 23:21:33,174 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2021-12-06 23:21:33,174 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 76 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 23:21:33,175 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 40 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 23:21:33,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-12-06 23:21:33,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 62. [2021-12-06 23:21:33,185 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) [2021-12-06 23:21:33,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 67 transitions. [2021-12-06 23:21:33,185 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 67 transitions. Word has length 41 [2021-12-06 23:21:33,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:21:33,186 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 67 transitions. [2021-12-06 23:21:33,186 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) [2021-12-06 23:21:33,186 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 67 transitions. [2021-12-06 23:21:33,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-06 23:21:33,187 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:21:33,187 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] [2021-12-06 23:21:33,210 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db4a074-75c1-46ae-868e-08dac4c62d63/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-06 23:21:33,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db4a074-75c1-46ae-868e-08dac4c62d63/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:21:33,389 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:21:33,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:21:33,390 INFO L85 PathProgramCache]: Analyzing trace with hash -702683966, now seen corresponding path program 9 times [2021-12-06 23:21:33,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:21:33,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870857930] [2021-12-06 23:21:33,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:21:33,391 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:21:33,448 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 23:21:33,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [977266436] [2021-12-06 23:21:33,448 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 23:21:33,448 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:21:33,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db4a074-75c1-46ae-868e-08dac4c62d63/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:21:33,450 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db4a074-75c1-46ae-868e-08dac4c62d63/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:21:33,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db4a074-75c1-46ae-868e-08dac4c62d63/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-06 23:21:33,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-06 23:21:33,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:21:33,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-06 23:21:33,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:21:33,705 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-06 23:21:33,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:21:33,778 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-06 23:21:33,779 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:21:33,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870857930] [2021-12-06 23:21:33,779 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 23:21:33,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977266436] [2021-12-06 23:21:33,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977266436] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:21:33,779 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 23:21:33,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-12-06 23:21:33,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288299157] [2021-12-06 23:21:33,779 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 23:21:33,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-06 23:21:33,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:21:33,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-06 23:21:33,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-12-06 23:21:33,780 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) [2021-12-06 23:21:33,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:21:33,974 INFO L93 Difference]: Finished difference Result 71 states and 76 transitions. [2021-12-06 23:21:33,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 23:21:33,974 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 [2021-12-06 23:21:33,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:21:33,975 INFO L225 Difference]: With dead ends: 71 [2021-12-06 23:21:33,975 INFO L226 Difference]: Without dead ends: 51 [2021-12-06 23:21:33,975 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=149, Invalid=403, Unknown=0, NotChecked=0, Total=552 [2021-12-06 23:21:33,976 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 107 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:21:33,976 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 20 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 23:21:33,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-12-06 23:21:33,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 48. [2021-12-06 23:21:33,985 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) [2021-12-06 23:21:33,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 51 transitions. [2021-12-06 23:21:33,985 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 51 transitions. Word has length 41 [2021-12-06 23:21:33,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:21:33,985 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 51 transitions. [2021-12-06 23:21:33,985 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) [2021-12-06 23:21:33,985 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 51 transitions. [2021-12-06 23:21:33,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-06 23:21:33,986 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:21:33,986 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] [2021-12-06 23:21:34,006 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db4a074-75c1-46ae-868e-08dac4c62d63/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-06 23:21:34,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db4a074-75c1-46ae-868e-08dac4c62d63/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:21:34,187 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:21:34,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:21:34,188 INFO L85 PathProgramCache]: Analyzing trace with hash -1719679608, now seen corresponding path program 10 times [2021-12-06 23:21:34,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:21:34,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99716055] [2021-12-06 23:21:34,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:21:34,190 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:21:34,243 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 23:21:34,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1406693493] [2021-12-06 23:21:34,243 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 23:21:34,244 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:21:34,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db4a074-75c1-46ae-868e-08dac4c62d63/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:21:34,245 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db4a074-75c1-46ae-868e-08dac4c62d63/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:21:34,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db4a074-75c1-46ae-868e-08dac4c62d63/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-06 23:21:34,305 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 23:21:34,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:21:34,307 WARN L261 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 116 conjunts are in the unsatisfiable core [2021-12-06 23:21:34,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:21:34,327 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 [2021-12-06 23:21:34,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:34,347 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 [2021-12-06 23:21:34,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:34,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:34,396 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 35 treesize of output 37 [2021-12-06 23:21:34,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:34,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:34,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:34,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:34,456 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 [2021-12-06 23:21:34,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:34,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:34,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:34,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:34,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:34,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:34,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:34,539 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 [2021-12-06 23:21:34,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:34,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:34,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:21:34,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:34,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:34,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:34,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:34,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:34,693 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 [2021-12-06 23:21:34,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:34,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:34,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:34,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:34,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:34,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:34,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:34,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:34,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:21:34,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:34,804 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 81 treesize of output 66 [2021-12-06 23:21:34,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:34,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:34,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:34,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:34,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:34,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:21:34,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:34,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:34,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:34,928 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 [2021-12-06 23:21:35,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:35,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:35,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:35,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:35,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:35,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:35,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:35,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:35,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:35,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:21:35,066 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 88 treesize of output 66 [2021-12-06 23:21:35,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:35,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:35,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:21:35,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:35,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:35,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:35,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:35,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:35,378 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 92 treesize of output 68 [2021-12-06 23:21:35,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:35,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:35,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:35,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:35,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:35,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:35,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:35,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:35,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:21:35,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:35,541 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 [2021-12-06 23:21:35,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:35,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:35,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:35,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:35,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:35,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:21:35,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:35,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:35,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:35,719 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 89 treesize of output 67 [2021-12-06 23:21:35,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:35,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:35,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:35,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:35,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:35,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:35,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:35,875 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 67 treesize of output 59 [2021-12-06 23:21:35,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:35,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:35,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:35,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:35,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:35,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:35,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:35,996 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 53 treesize of output 57 [2021-12-06 23:21:36,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:36,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:36,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:21:36,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:36,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:36,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:36,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:36,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:36,091 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 [2021-12-06 23:21:36,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:36,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:36,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:36,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:36,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:36,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:36,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:36,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:36,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:21:36,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:36,291 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 81 treesize of output 66 [2021-12-06 23:21:36,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:36,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:36,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:21:36,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:36,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:36,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:36,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:36,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:36,490 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 86 treesize of output 71 [2021-12-06 23:21:36,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:36,694 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 68 treesize of output 56 [2021-12-06 23:21:36,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:36,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 74 treesize of output 42 [2021-12-06 23:21:36,923 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:21:36,923 INFO L328 TraceCheckSpWp]: Computing backward predicates...