./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-patterns/array6_pattern.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f8e1c903 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9650f598-7271-4569-9943-bcce61f17f67/bin/uautomizer-IVEQpCNsaX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9650f598-7271-4569-9943-bcce61f17f67/bin/uautomizer-IVEQpCNsaX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9650f598-7271-4569-9943-bcce61f17f67/bin/uautomizer-IVEQpCNsaX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9650f598-7271-4569-9943-bcce61f17f67/bin/uautomizer-IVEQpCNsaX/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-patterns/array6_pattern.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9650f598-7271-4569-9943-bcce61f17f67/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9650f598-7271-4569-9943-bcce61f17f67/bin/uautomizer-IVEQpCNsaX --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 81db346fb66b40514998cf838e858b3f0793fe5c74d5812efa60193ab54d6833 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-f8e1c90 [2021-11-09 08:34:56,362 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-09 08:34:56,365 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-09 08:34:56,425 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-09 08:34:56,426 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-09 08:34:56,431 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-09 08:34:56,434 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-09 08:34:56,440 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-09 08:34:56,443 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-09 08:34:56,451 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-09 08:34:56,453 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-09 08:34:56,455 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-09 08:34:56,456 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-09 08:34:56,459 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-09 08:34:56,463 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-09 08:34:56,469 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-09 08:34:56,470 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-09 08:34:56,472 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-09 08:34:56,476 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-09 08:34:56,483 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-09 08:34:56,486 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-09 08:34:56,488 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-09 08:34:56,492 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-09 08:34:56,493 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-09 08:34:56,500 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-09 08:34:56,500 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-09 08:34:56,501 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-09 08:34:56,503 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-09 08:34:56,504 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-09 08:34:56,506 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-09 08:34:56,507 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-09 08:34:56,508 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-09 08:34:56,511 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-09 08:34:56,512 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-09 08:34:56,514 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-09 08:34:56,515 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-09 08:34:56,516 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-09 08:34:56,516 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-09 08:34:56,516 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-09 08:34:56,518 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-09 08:34:56,519 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-09 08:34:56,520 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9650f598-7271-4569-9943-bcce61f17f67/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-09 08:34:56,577 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-09 08:34:56,579 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-09 08:34:56,580 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-09 08:34:56,580 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-09 08:34:56,581 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-09 08:34:56,582 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-09 08:34:56,582 INFO L138 SettingsManager]: * Use SBE=true [2021-11-09 08:34:56,582 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-09 08:34:56,583 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-09 08:34:56,583 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-09 08:34:56,584 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-09 08:34:56,584 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-09 08:34:56,585 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-09 08:34:56,585 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-09 08:34:56,585 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-09 08:34:56,585 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-09 08:34:56,586 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-09 08:34:56,586 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-09 08:34:56,586 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-09 08:34:56,587 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-09 08:34:56,587 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-09 08:34:56,587 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-09 08:34:56,587 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 08:34:56,588 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-09 08:34:56,588 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-09 08:34:56,588 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-09 08:34:56,588 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-09 08:34:56,589 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-09 08:34:56,589 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-09 08:34:56,589 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-09 08:34:56,589 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-09 08:34:56,590 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-09 08:34:56,590 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_9650f598-7271-4569-9943-bcce61f17f67/bin/uautomizer-IVEQpCNsaX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9650f598-7271-4569-9943-bcce61f17f67/bin/uautomizer-IVEQpCNsaX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 81db346fb66b40514998cf838e858b3f0793fe5c74d5812efa60193ab54d6833 [2021-11-09 08:34:56,883 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 08:34:56,915 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 08:34:56,918 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 08:34:56,920 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 08:34:56,921 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 08:34:56,922 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9650f598-7271-4569-9943-bcce61f17f67/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/array-patterns/array6_pattern.c [2021-11-09 08:34:56,995 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9650f598-7271-4569-9943-bcce61f17f67/bin/uautomizer-IVEQpCNsaX/data/e71add483/342d1fb8ff164cfaab39ddd15f06d07f/FLAGd21c503a8 [2021-11-09 08:34:57,580 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 08:34:57,580 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9650f598-7271-4569-9943-bcce61f17f67/sv-benchmarks/c/array-patterns/array6_pattern.c [2021-11-09 08:34:57,588 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9650f598-7271-4569-9943-bcce61f17f67/bin/uautomizer-IVEQpCNsaX/data/e71add483/342d1fb8ff164cfaab39ddd15f06d07f/FLAGd21c503a8 [2021-11-09 08:34:57,938 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9650f598-7271-4569-9943-bcce61f17f67/bin/uautomizer-IVEQpCNsaX/data/e71add483/342d1fb8ff164cfaab39ddd15f06d07f [2021-11-09 08:34:57,943 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 08:34:57,947 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-09 08:34:57,948 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 08:34:57,949 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 08:34:57,953 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 08:34:57,954 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 08:34:57" (1/1) ... [2021-11-09 08:34:57,955 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d868e80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:34:57, skipping insertion in model container [2021-11-09 08:34:57,956 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 08:34:57" (1/1) ... [2021-11-09 08:34:57,965 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 08:34:57,983 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 08:34:58,160 WARN L228 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_9650f598-7271-4569-9943-bcce61f17f67/sv-benchmarks/c/array-patterns/array6_pattern.c[1356,1369] [2021-11-09 08:34:58,216 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 08:34:58,240 INFO L203 MainTranslator]: Completed pre-run [2021-11-09 08:34:58,261 WARN L228 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_9650f598-7271-4569-9943-bcce61f17f67/sv-benchmarks/c/array-patterns/array6_pattern.c[1356,1369] [2021-11-09 08:34:58,295 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 08:34:58,323 INFO L208 MainTranslator]: Completed translation [2021-11-09 08:34:58,323 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:34:58 WrapperNode [2021-11-09 08:34:58,324 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 08:34:58,326 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-09 08:34:58,327 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-09 08:34:58,327 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-09 08:34:58,337 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:34:58" (1/1) ... [2021-11-09 08:34:58,352 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:34:58" (1/1) ... [2021-11-09 08:34:58,391 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-09 08:34:58,393 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-09 08:34:58,393 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-09 08:34:58,394 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-09 08:34:58,403 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:34:58" (1/1) ... [2021-11-09 08:34:58,403 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:34:58" (1/1) ... [2021-11-09 08:34:58,410 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:34:58" (1/1) ... [2021-11-09 08:34:58,411 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:34:58" (1/1) ... [2021-11-09 08:34:58,431 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:34:58" (1/1) ... [2021-11-09 08:34:58,438 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:34:58" (1/1) ... [2021-11-09 08:34:58,445 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:34:58" (1/1) ... [2021-11-09 08:34:58,452 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-09 08:34:58,454 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-09 08:34:58,455 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-09 08:34:58,455 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-09 08:34:58,456 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:34:58" (1/1) ... [2021-11-09 08:34:58,466 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 08:34:58,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9650f598-7271-4569-9943-bcce61f17f67/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:34:58,501 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9650f598-7271-4569-9943-bcce61f17f67/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-09 08:34:58,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9650f598-7271-4569-9943-bcce61f17f67/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-09 08:34:58,563 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-09 08:34:58,564 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-09 08:34:58,564 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-09 08:34:58,564 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-09 08:34:58,564 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-09 08:34:58,565 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-09 08:34:58,565 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-09 08:34:58,827 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-09 08:34:58,827 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-11-09 08:34:58,829 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 08:34:58 BoogieIcfgContainer [2021-11-09 08:34:58,829 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-09 08:34:58,832 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-09 08:34:58,832 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-09 08:34:58,836 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-09 08:34:58,836 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 08:34:57" (1/3) ... [2021-11-09 08:34:58,837 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b1af990 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 08:34:58, skipping insertion in model container [2021-11-09 08:34:58,838 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:34:58" (2/3) ... [2021-11-09 08:34:58,838 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b1af990 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 08:34:58, skipping insertion in model container [2021-11-09 08:34:58,839 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 08:34:58" (3/3) ... [2021-11-09 08:34:58,840 INFO L111 eAbstractionObserver]: Analyzing ICFG array6_pattern.c [2021-11-09 08:34:58,847 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-09 08:34:58,848 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-09 08:34:58,904 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-09 08:34:58,912 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-09 08:34:58,913 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-09 08:34:58,930 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:34:58,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-09 08:34:58,937 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:34:58,937 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:34:58,938 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:34:58,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:34:58,945 INFO L85 PathProgramCache]: Analyzing trace with hash 555623354, now seen corresponding path program 1 times [2021-11-09 08:34:58,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:34:58,956 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514431216] [2021-11-09 08:34:58,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:34:58,957 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:34:59,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:34:59,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:34:59,175 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:34:59,177 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514431216] [2021-11-09 08:34:59,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514431216] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:34:59,179 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:34:59,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-09 08:34:59,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837561715] [2021-11-09 08:34:59,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-09 08:34:59,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:34:59,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-09 08:34:59,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-09 08:34:59,225 INFO L87 Difference]: Start difference. First operand has 21 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:34:59,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:34:59,249 INFO L93 Difference]: Finished difference Result 39 states and 56 transitions. [2021-11-09 08:34:59,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-09 08:34:59,251 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-09 08:34:59,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:34:59,261 INFO L225 Difference]: With dead ends: 39 [2021-11-09 08:34:59,261 INFO L226 Difference]: Without dead ends: 17 [2021-11-09 08:34:59,265 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-09 08:34:59,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-09 08:34:59,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-11-09 08:34:59,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:34:59,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-11-09 08:34:59,312 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2021-11-09 08:34:59,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:34:59,313 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-11-09 08:34:59,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:34:59,314 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-11-09 08:34:59,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-09 08:34:59,315 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:34:59,316 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:34:59,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-09 08:34:59,316 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:34:59,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:34:59,322 INFO L85 PathProgramCache]: Analyzing trace with hash 2030844390, now seen corresponding path program 1 times [2021-11-09 08:34:59,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:34:59,323 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633699328] [2021-11-09 08:34:59,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:34:59,325 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:34:59,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:34:59,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:34:59,655 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:34:59,656 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633699328] [2021-11-09 08:34:59,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633699328] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:34:59,656 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:34:59,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 08:34:59,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225788457] [2021-11-09 08:34:59,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:34:59,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:34:59,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:34:59,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:34:59,669 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:34:59,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:34:59,712 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2021-11-09 08:34:59,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:34:59,718 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-09 08:34:59,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:34:59,720 INFO L225 Difference]: With dead ends: 22 [2021-11-09 08:34:59,721 INFO L226 Difference]: Without dead ends: 18 [2021-11-09 08:34:59,723 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 08:34:59,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-09 08:34:59,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-11-09 08:34:59,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:34:59,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2021-11-09 08:34:59,735 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 14 [2021-11-09 08:34:59,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:34:59,736 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2021-11-09 08:34:59,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:34:59,738 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2021-11-09 08:34:59,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-09 08:34:59,739 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:34:59,739 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:34:59,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-09 08:34:59,740 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:34:59,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:34:59,742 INFO L85 PathProgramCache]: Analyzing trace with hash 1779540136, now seen corresponding path program 1 times [2021-11-09 08:34:59,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:34:59,742 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496562194] [2021-11-09 08:34:59,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:34:59,744 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:34:59,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:34:59,871 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:34:59,871 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:34:59,872 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496562194] [2021-11-09 08:34:59,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496562194] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:34:59,873 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:34:59,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 08:34:59,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252221617] [2021-11-09 08:34:59,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 08:34:59,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:34:59,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 08:34:59,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 08:34:59,880 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:34:59,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:34:59,976 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2021-11-09 08:34:59,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 08:34:59,978 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-09 08:34:59,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:34:59,980 INFO L225 Difference]: With dead ends: 33 [2021-11-09 08:34:59,981 INFO L226 Difference]: Without dead ends: 21 [2021-11-09 08:34:59,981 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 08:34:59,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-11-09 08:34:59,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2021-11-09 08:34:59,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:34:59,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-11-09 08:34:59,994 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 16 [2021-11-09 08:34:59,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:34:59,995 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-11-09 08:34:59,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:34:59,996 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-11-09 08:34:59,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-09 08:34:59,996 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:34:59,997 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:34:59,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-09 08:34:59,999 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:35:00,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:35:00,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1277885066, now seen corresponding path program 1 times [2021-11-09 08:35:00,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:35:00,002 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729585985] [2021-11-09 08:35:00,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:35:00,002 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:35:00,038 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:35:00,047 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1136087221] [2021-11-09 08:35:00,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:35:00,048 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:35:00,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9650f598-7271-4569-9943-bcce61f17f67/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:35:00,051 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9650f598-7271-4569-9943-bcce61f17f67/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:35:00,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9650f598-7271-4569-9943-bcce61f17f67/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-09 08:35:00,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:35:00,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-09 08:35:00,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:35:00,413 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 08:35:00,413 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:35:00,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729585985] [2021-11-09 08:35:00,414 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:35:00,414 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136087221] [2021-11-09 08:35:00,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136087221] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:35:00,414 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:35:00,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-11-09 08:35:00,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031609841] [2021-11-09 08:35:00,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 08:35:00,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:35:00,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 08:35:00,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-09 08:35:00,417 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:00,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:35:00,490 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2021-11-09 08:35:00,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 08:35:00,491 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-09 08:35:00,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:35:00,492 INFO L225 Difference]: With dead ends: 43 [2021-11-09 08:35:00,492 INFO L226 Difference]: Without dead ends: 29 [2021-11-09 08:35:00,493 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-09 08:35:00,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-09 08:35:00,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 21. [2021-11-09 08:35:00,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:00,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2021-11-09 08:35:00,498 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 18 [2021-11-09 08:35:00,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:35:00,498 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2021-11-09 08:35:00,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:00,499 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2021-11-09 08:35:00,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-09 08:35:00,500 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:35:00,500 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:35:00,546 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9650f598-7271-4569-9943-bcce61f17f67/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-09 08:35:00,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9650f598-7271-4569-9943-bcce61f17f67/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:35:00,728 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:35:00,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:35:00,729 INFO L85 PathProgramCache]: Analyzing trace with hash 223699948, now seen corresponding path program 2 times [2021-11-09 08:35:00,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:35:00,729 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863441352] [2021-11-09 08:35:00,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:35:00,730 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:35:00,744 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:35:00,744 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [23743722] [2021-11-09 08:35:00,745 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:35:00,745 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:35:00,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9650f598-7271-4569-9943-bcce61f17f67/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:35:00,746 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9650f598-7271-4569-9943-bcce61f17f67/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:35:00,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9650f598-7271-4569-9943-bcce61f17f67/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-09 08:35:00,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:35:00,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:35:00,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-09 08:35:00,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:35:01,072 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:35:01,072 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:35:01,073 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863441352] [2021-11-09 08:35:01,073 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:35:01,073 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23743722] [2021-11-09 08:35:01,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23743722] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:35:01,074 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:35:01,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-11-09 08:35:01,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764138061] [2021-11-09 08:35:01,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 08:35:01,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:35:01,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 08:35:01,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-09 08:35:01,078 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:01,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:35:01,187 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2021-11-09 08:35:01,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 08:35:01,188 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-09 08:35:01,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:35:01,191 INFO L225 Difference]: With dead ends: 28 [2021-11-09 08:35:01,191 INFO L226 Difference]: Without dead ends: 24 [2021-11-09 08:35:01,193 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-09 08:35:01,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-09 08:35:01,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2021-11-09 08:35:01,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:01,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2021-11-09 08:35:01,210 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 20 [2021-11-09 08:35:01,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:35:01,211 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2021-11-09 08:35:01,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:01,211 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2021-11-09 08:35:01,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-09 08:35:01,212 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:35:01,212 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:35:01,238 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9650f598-7271-4569-9943-bcce61f17f67/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-09 08:35:01,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9650f598-7271-4569-9943-bcce61f17f67/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:35:01,436 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:35:01,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:35:01,436 INFO L85 PathProgramCache]: Analyzing trace with hash 280518958, now seen corresponding path program 3 times [2021-11-09 08:35:01,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:35:01,437 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235850528] [2021-11-09 08:35:01,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:35:01,437 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:35:01,450 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:35:01,451 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1998227955] [2021-11-09 08:35:01,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:35:01,451 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:35:01,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9650f598-7271-4569-9943-bcce61f17f67/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:35:01,453 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9650f598-7271-4569-9943-bcce61f17f67/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:35:01,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9650f598-7271-4569-9943-bcce61f17f67/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-09 08:35:01,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-09 08:35:01,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:35:01,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-09 08:35:01,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:35:01,701 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 08:35:01,702 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:35:01,702 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235850528] [2021-11-09 08:35:01,702 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:35:01,702 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998227955] [2021-11-09 08:35:01,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998227955] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:35:01,703 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:35:01,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-11-09 08:35:01,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821484494] [2021-11-09 08:35:01,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 08:35:01,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:35:01,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 08:35:01,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-09 08:35:01,705 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:01,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:35:01,787 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2021-11-09 08:35:01,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-09 08:35:01,788 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-09 08:35:01,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:35:01,789 INFO L225 Difference]: With dead ends: 49 [2021-11-09 08:35:01,789 INFO L226 Difference]: Without dead ends: 33 [2021-11-09 08:35:01,790 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-09 08:35:01,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-11-09 08:35:01,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 25. [2021-11-09 08:35:01,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.125) internal successors, (27), 24 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:01,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2021-11-09 08:35:01,795 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 22 [2021-11-09 08:35:01,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:35:01,796 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2021-11-09 08:35:01,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:01,796 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2021-11-09 08:35:01,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-09 08:35:01,797 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:35:01,797 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:35:01,841 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9650f598-7271-4569-9943-bcce61f17f67/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-09 08:35:02,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9650f598-7271-4569-9943-bcce61f17f67/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-09 08:35:02,020 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:35:02,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:35:02,020 INFO L85 PathProgramCache]: Analyzing trace with hash -102020720, now seen corresponding path program 4 times [2021-11-09 08:35:02,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:35:02,021 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706195669] [2021-11-09 08:35:02,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:35:02,021 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:35:02,041 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:35:02,042 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1218390454] [2021-11-09 08:35:02,042 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 08:35:02,042 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:35:02,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9650f598-7271-4569-9943-bcce61f17f67/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:35:02,047 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9650f598-7271-4569-9943-bcce61f17f67/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:35:02,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9650f598-7271-4569-9943-bcce61f17f67/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-09 08:35:02,151 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 08:35:02,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:35:02,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-09 08:35:02,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:35:02,374 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:35:02,374 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:35:02,375 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706195669] [2021-11-09 08:35:02,375 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:35:02,375 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218390454] [2021-11-09 08:35:02,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218390454] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:35:02,376 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:35:02,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-11-09 08:35:02,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885466790] [2021-11-09 08:35:02,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-09 08:35:02,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:35:02,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-09 08:35:02,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-09 08:35:02,378 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:02,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:35:02,472 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2021-11-09 08:35:02,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-09 08:35:02,472 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-09 08:35:02,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:35:02,473 INFO L225 Difference]: With dead ends: 32 [2021-11-09 08:35:02,473 INFO L226 Difference]: Without dead ends: 28 [2021-11-09 08:35:02,474 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-11-09 08:35:02,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-11-09 08:35:02,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2021-11-09 08:35:02,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:02,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2021-11-09 08:35:02,482 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 24 [2021-11-09 08:35:02,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:35:02,483 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2021-11-09 08:35:02,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:02,483 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2021-11-09 08:35:02,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-09 08:35:02,488 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:35:02,488 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:35:02,512 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9650f598-7271-4569-9943-bcce61f17f67/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-09 08:35:02,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9650f598-7271-4569-9943-bcce61f17f67/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:35:02,692 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:35:02,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:35:02,692 INFO L85 PathProgramCache]: Analyzing trace with hash 795569618, now seen corresponding path program 5 times [2021-11-09 08:35:02,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:35:02,693 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738951445] [2021-11-09 08:35:02,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:35:02,693 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:35:02,706 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:35:02,707 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [40603578] [2021-11-09 08:35:02,707 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 08:35:02,707 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:35:02,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9650f598-7271-4569-9943-bcce61f17f67/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:35:02,708 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9650f598-7271-4569-9943-bcce61f17f67/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:35:02,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9650f598-7271-4569-9943-bcce61f17f67/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-09 08:35:02,885 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-09 08:35:02,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:35:02,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-09 08:35:02,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:35:02,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-09 08:35:03,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:35:03,047 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 49 treesize of output 29 [2021-11-09 08:35:03,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:03,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:03,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:03,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 70 [2021-11-09 08:35:03,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:03,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:03,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:03,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:03,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:03,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:03,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:35:03,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:03,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:03,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:35:03,562 INFO L354 Elim1Store]: treesize reduction 40, result has 25.9 percent of original size [2021-11-09 08:35:03,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 128 treesize of output 76 [2021-11-09 08:35:04,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:04,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:04,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:04,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:04,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:35:04,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:04,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:04,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:35:05,606 INFO L354 Elim1Store]: treesize reduction 4489, result has 5.3 percent of original size [2021-11-09 08:35:05,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 10 select indices, 10 select index equivalence classes, 3 disjoint index pairs (out of 45 index pairs), introduced 14 new quantified variables, introduced 89 case distinctions, treesize of input 589 treesize of output 456 [2021-11-09 08:35:05,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:05,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:05,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:05,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:05,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:05,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:05,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:05,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:05,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:35:05,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 7 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 177 treesize of output 118 [2021-11-09 08:35:05,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:05,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:05,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:05,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:05,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:05,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:05,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:05,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 161 treesize of output 110 [2021-11-09 08:35:05,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:05,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:05,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:05,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:05,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:05,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:05,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:05,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:35:05,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:35:05,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:35:05,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:35:05,952 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-09 08:35:05,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 256 treesize of output 112 [2021-11-09 08:35:07,011 INFO L354 Elim1Store]: treesize reduction 346, result has 3.1 percent of original size [2021-11-09 08:35:07,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 98 treesize of output 44 [2021-11-09 08:35:07,081 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:35:07,082 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:35:07,082 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738951445] [2021-11-09 08:35:07,082 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:35:07,082 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40603578] [2021-11-09 08:35:07,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40603578] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:35:07,083 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:35:07,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-11-09 08:35:07,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252234794] [2021-11-09 08:35:07,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-09 08:35:07,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:35:07,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-09 08:35:07,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-11-09 08:35:07,087 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:07,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:35:07,870 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2021-11-09 08:35:07,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-09 08:35:07,870 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 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 26 [2021-11-09 08:35:07,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:35:07,871 INFO L225 Difference]: With dead ends: 48 [2021-11-09 08:35:07,871 INFO L226 Difference]: Without dead ends: 44 [2021-11-09 08:35:07,872 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-11-09 08:35:07,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-11-09 08:35:07,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 36. [2021-11-09 08:35:07,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 35 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:07,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2021-11-09 08:35:07,886 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 26 [2021-11-09 08:35:07,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:35:07,889 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2021-11-09 08:35:07,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:07,889 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2021-11-09 08:35:07,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-09 08:35:07,890 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:35:07,891 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:35:07,938 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9650f598-7271-4569-9943-bcce61f17f67/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-09 08:35:08,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9650f598-7271-4569-9943-bcce61f17f67/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-09 08:35:08,116 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:35:08,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:35:08,116 INFO L85 PathProgramCache]: Analyzing trace with hash -95464140, now seen corresponding path program 6 times [2021-11-09 08:35:08,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:35:08,116 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29843914] [2021-11-09 08:35:08,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:35:08,117 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:35:08,136 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:35:08,148 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1969227160] [2021-11-09 08:35:08,148 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 08:35:08,148 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:35:08,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9650f598-7271-4569-9943-bcce61f17f67/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:35:08,150 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9650f598-7271-4569-9943-bcce61f17f67/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:35:08,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9650f598-7271-4569-9943-bcce61f17f67/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-09 08:35:08,365 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-11-09 08:35:08,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:35:08,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-09 08:35:08,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:35:08,550 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:35:08,550 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:35:08,550 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29843914] [2021-11-09 08:35:08,550 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:35:08,551 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969227160] [2021-11-09 08:35:08,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969227160] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:35:08,551 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:35:08,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-11-09 08:35:08,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392227613] [2021-11-09 08:35:08,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-09 08:35:08,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:35:08,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-09 08:35:08,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-09 08:35:08,553 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:08,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:35:08,724 INFO L93 Difference]: Finished difference Result 64 states and 69 transitions. [2021-11-09 08:35:08,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-09 08:35:08,724 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 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 28 [2021-11-09 08:35:08,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:35:08,725 INFO L225 Difference]: With dead ends: 64 [2021-11-09 08:35:08,725 INFO L226 Difference]: Without dead ends: 60 [2021-11-09 08:35:08,726 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-11-09 08:35:08,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-11-09 08:35:08,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 40. [2021-11-09 08:35:08,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 39 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:08,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2021-11-09 08:35:08,735 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 28 [2021-11-09 08:35:08,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:35:08,736 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2021-11-09 08:35:08,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:08,736 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2021-11-09 08:35:08,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-09 08:35:08,737 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:35:08,738 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:35:08,766 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9650f598-7271-4569-9943-bcce61f17f67/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-09 08:35:08,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9650f598-7271-4569-9943-bcce61f17f67/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:35:08,940 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:35:08,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:35:08,944 INFO L85 PathProgramCache]: Analyzing trace with hash 91457940, now seen corresponding path program 7 times [2021-11-09 08:35:08,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:35:08,944 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409763495] [2021-11-09 08:35:08,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:35:08,944 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:35:08,962 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:35:08,962 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1975538894] [2021-11-09 08:35:08,963 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 08:35:08,963 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:35:08,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9650f598-7271-4569-9943-bcce61f17f67/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:35:08,964 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9650f598-7271-4569-9943-bcce61f17f67/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:35:08,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9650f598-7271-4569-9943-bcce61f17f67/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-09 08:35:09,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:35:09,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-09 08:35:09,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:35:09,271 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:35:09,272 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:35:09,272 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409763495] [2021-11-09 08:35:09,272 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:35:09,272 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975538894] [2021-11-09 08:35:09,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975538894] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:35:09,273 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:35:09,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-11-09 08:35:09,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496016412] [2021-11-09 08:35:09,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-09 08:35:09,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:35:09,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-09 08:35:09,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-09 08:35:09,281 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:09,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:35:09,420 INFO L93 Difference]: Finished difference Result 67 states and 72 transitions. [2021-11-09 08:35:09,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-09 08:35:09,422 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 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 28 [2021-11-09 08:35:09,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:35:09,422 INFO L225 Difference]: With dead ends: 67 [2021-11-09 08:35:09,423 INFO L226 Difference]: Without dead ends: 53 [2021-11-09 08:35:09,423 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-11-09 08:35:09,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-11-09 08:35:09,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 47. [2021-11-09 08:35:09,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.108695652173913) internal successors, (51), 46 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:09,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2021-11-09 08:35:09,433 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 28 [2021-11-09 08:35:09,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:35:09,434 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2021-11-09 08:35:09,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:09,435 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2021-11-09 08:35:09,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-09 08:35:09,440 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:35:09,440 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:35:09,473 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9650f598-7271-4569-9943-bcce61f17f67/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-09 08:35:09,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9650f598-7271-4569-9943-bcce61f17f67/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-09 08:35:09,658 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:35:09,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:35:09,659 INFO L85 PathProgramCache]: Analyzing trace with hash -1493491594, now seen corresponding path program 8 times [2021-11-09 08:35:09,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:35:09,659 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996454436] [2021-11-09 08:35:09,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:35:09,659 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:35:09,682 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:35:09,682 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2116390555] [2021-11-09 08:35:09,682 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:35:09,695 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:35:09,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9650f598-7271-4569-9943-bcce61f17f67/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:35:09,709 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9650f598-7271-4569-9943-bcce61f17f67/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:35:09,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9650f598-7271-4569-9943-bcce61f17f67/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-09 08:35:09,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:35:09,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:35:09,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 52 conjunts are in the unsatisfiable core [2021-11-09 08:35:09,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:35:09,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-09 08:35:10,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:35:10,023 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 49 treesize of output 29 [2021-11-09 08:35:10,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:10,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:10,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:10,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 70 [2021-11-09 08:35:10,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:10,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:10,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:10,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:10,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:10,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:10,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:10,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:35:10,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:10,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:10,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:35:10,326 INFO L354 Elim1Store]: treesize reduction 40, result has 25.9 percent of original size [2021-11-09 08:35:10,326 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 7 case distinctions, treesize of input 84 treesize of output 74 [2021-11-09 08:35:10,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:10,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:10,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:10,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:10,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:10,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:10,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:10,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:10,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:10,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:10,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:10,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:35:10,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:10,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:10,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:10,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:10,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:35:10,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:10,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:10,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:35:10,557 INFO L354 Elim1Store]: treesize reduction 47, result has 19.0 percent of original size [2021-11-09 08:35:10,558 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 6 new quantified variables, introduced 16 case distinctions, treesize of input 104 treesize of output 105 [2021-11-09 08:35:11,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:11,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:35:11,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:11,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:11,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:11,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:11,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:11,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:11,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:11,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:11,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:35:11,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:11,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:11,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:35:13,688 INFO L354 Elim1Store]: treesize reduction 5155, result has 8.3 percent of original size [2021-11-09 08:35:13,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 12 select indices, 12 select index equivalence classes, 6 disjoint index pairs (out of 66 index pairs), introduced 16 new quantified variables, introduced 118 case distinctions, treesize of input 611 treesize of output 684 [2021-11-09 08:35:15,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:15,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:15,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:15,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:15,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:15,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:15,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:15,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:15,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:15,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:15,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:15,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:15,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:15,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 13 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 543 treesize of output 391 [2021-11-09 08:35:15,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:15,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:15,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:15,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:15,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:15,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:15,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:15,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:15,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:15,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:15,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:15,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:15,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:15,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 13 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 434 treesize of output 264 [2021-11-09 08:35:16,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:16,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:35:16,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:16,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:16,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:16,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:16,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:16,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:16,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:16,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:16,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:35:16,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:16,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:16,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:35:16,118 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-11-09 08:35:16,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 396 treesize of output 266 [2021-11-09 08:35:18,065 INFO L354 Elim1Store]: treesize reduction 29, result has 12.1 percent of original size [2021-11-09 08:35:18,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 157 treesize of output 77 [2021-11-09 08:35:18,159 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:35:18,159 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:35:18,159 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996454436] [2021-11-09 08:35:18,159 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:35:18,160 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116390555] [2021-11-09 08:35:18,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116390555] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:35:18,160 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:35:18,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-11-09 08:35:18,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444487202] [2021-11-09 08:35:18,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-09 08:35:18,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:35:18,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-09 08:35:18,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-11-09 08:35:18,162 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:19,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:35:19,314 INFO L93 Difference]: Finished difference Result 70 states and 76 transitions. [2021-11-09 08:35:19,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-09 08:35:19,315 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 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 30 [2021-11-09 08:35:19,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:35:19,316 INFO L225 Difference]: With dead ends: 70 [2021-11-09 08:35:19,316 INFO L226 Difference]: Without dead ends: 66 [2021-11-09 08:35:19,317 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 7 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2021-11-09 08:35:19,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-11-09 08:35:19,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 56. [2021-11-09 08:35:19,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.1272727272727272) internal successors, (62), 55 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:19,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 62 transitions. [2021-11-09 08:35:19,328 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 62 transitions. Word has length 30 [2021-11-09 08:35:19,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:35:19,329 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 62 transitions. [2021-11-09 08:35:19,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:19,329 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 62 transitions. [2021-11-09 08:35:19,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-09 08:35:19,330 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:35:19,330 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:35:19,373 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9650f598-7271-4569-9943-bcce61f17f67/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-09 08:35:19,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9650f598-7271-4569-9943-bcce61f17f67/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:35:19,556 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:35:19,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:35:19,556 INFO L85 PathProgramCache]: Analyzing trace with hash -344237208, now seen corresponding path program 1 times [2021-11-09 08:35:19,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:35:19,556 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615088997] [2021-11-09 08:35:19,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:35:19,557 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:35:19,566 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 08:35:19,566 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [225643226] [2021-11-09 08:35:19,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:35:19,566 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:35:19,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9650f598-7271-4569-9943-bcce61f17f67/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:35:19,569 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9650f598-7271-4569-9943-bcce61f17f67/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:35:19,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9650f598-7271-4569-9943-bcce61f17f67/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-09 08:35:19,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:35:19,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-09 08:35:19,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:35:19,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-09 08:35:20,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:35:20,024 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 49 treesize of output 29 [2021-11-09 08:35:20,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:20,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:20,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:20,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 49 [2021-11-09 08:35:20,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:20,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:20,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:20,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:20,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:20,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:20,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:35:20,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:20,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:20,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:35:20,330 INFO L354 Elim1Store]: treesize reduction 40, result has 25.9 percent of original size [2021-11-09 08:35:20,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 128 treesize of output 76 [2021-11-09 08:35:20,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:20,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:20,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:20,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:20,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:35:20,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:20,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:20,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:35:22,136 INFO L354 Elim1Store]: treesize reduction 4494, result has 5.2 percent of original size [2021-11-09 08:35:22,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 10 select indices, 10 select index equivalence classes, 3 disjoint index pairs (out of 45 index pairs), introduced 14 new quantified variables, introduced 89 case distinctions, treesize of input 591 treesize of output 453 [2021-11-09 08:35:22,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:22,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:22,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:22,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:22,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:22,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:22,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:22,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 181 treesize of output 110 [2021-11-09 08:35:22,333 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-09 08:35:22,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:22,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:22,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:22,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:22,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:22,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:22,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:22,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 233 treesize of output 139 [2021-11-09 08:35:22,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:22,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:35:22,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:22,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:22,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:22,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:22,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:22,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:22,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:22,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:35:22,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:35:22,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:35:22,556 INFO L354 Elim1Store]: treesize reduction 33, result has 8.3 percent of original size [2021-11-09 08:35:22,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 268 treesize of output 161 [2021-11-09 08:35:22,760 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:35:22,760 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615088997] [2021-11-09 08:35:22,761 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 08:35:22,761 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225643226] [2021-11-09 08:35:22,761 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [ULTIMATE.start_main_~index~0] [2021-11-09 08:35:22,761 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:35:22,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-11-09 08:35:22,761 ERROR L172 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2021-11-09 08:35:22,762 INFO L627 BasicCegarLoop]: Counterexample might be feasible [2021-11-09 08:35:22,768 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-11-09 08:35:22,811 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9650f598-7271-4569-9943-bcce61f17f67/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-09 08:35:22,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9650f598-7271-4569-9943-bcce61f17f67/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:35:22,974 INFO L731 BasicCegarLoop]: Path program histogram: [8, 1, 1, 1, 1] [2021-11-09 08:35:22,976 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-09 08:35:22,999 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.11 08:35:22 BoogieIcfgContainer [2021-11-09 08:35:22,999 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-09 08:35:23,000 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-09 08:35:23,000 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-09 08:35:23,000 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-09 08:35:23,001 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 08:34:58" (3/4) ... [2021-11-09 08:35:23,004 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-09 08:35:23,004 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-09 08:35:23,005 INFO L168 Benchmark]: Toolchain (without parser) took 25058.00 ms. Allocated memory was 98.6 MB in the beginning and 195.0 MB in the end (delta: 96.5 MB). Free memory was 66.1 MB in the beginning and 99.8 MB in the end (delta: -33.6 MB). Peak memory consumption was 63.1 MB. Max. memory is 16.1 GB. [2021-11-09 08:35:23,005 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 98.6 MB. Free memory is still 54.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-09 08:35:23,006 INFO L168 Benchmark]: CACSL2BoogieTranslator took 376.73 ms. Allocated memory was 98.6 MB in the beginning and 134.2 MB in the end (delta: 35.7 MB). Free memory was 65.9 MB in the beginning and 108.4 MB in the end (delta: -42.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-09 08:35:23,006 INFO L168 Benchmark]: Boogie Procedure Inliner took 65.83 ms. Allocated memory is still 134.2 MB. Free memory was 108.4 MB in the beginning and 107.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-09 08:35:23,006 INFO L168 Benchmark]: Boogie Preprocessor took 60.21 ms. Allocated memory is still 134.2 MB. Free memory was 106.5 MB in the beginning and 105.3 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-09 08:35:23,007 INFO L168 Benchmark]: RCFGBuilder took 375.89 ms. Allocated memory is still 134.2 MB. Free memory was 105.3 MB in the beginning and 94.4 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-09 08:35:23,007 INFO L168 Benchmark]: TraceAbstraction took 24167.60 ms. Allocated memory was 134.2 MB in the beginning and 195.0 MB in the end (delta: 60.8 MB). Free memory was 94.0 MB in the beginning and 100.8 MB in the end (delta: -6.8 MB). Peak memory consumption was 55.7 MB. Max. memory is 16.1 GB. [2021-11-09 08:35:23,008 INFO L168 Benchmark]: Witness Printer took 4.24 ms. Allocated memory is still 195.0 MB. Free memory was 100.8 MB in the beginning and 99.8 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-09 08:35:23,010 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 98.6 MB. Free memory is still 54.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 376.73 ms. Allocated memory was 98.6 MB in the beginning and 134.2 MB in the end (delta: 35.7 MB). Free memory was 65.9 MB in the beginning and 108.4 MB in the end (delta: -42.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 65.83 ms. Allocated memory is still 134.2 MB. Free memory was 108.4 MB in the beginning and 107.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 60.21 ms. Allocated memory is still 134.2 MB. Free memory was 106.5 MB in the beginning and 105.3 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 375.89 ms. Allocated memory is still 134.2 MB. Free memory was 105.3 MB in the beginning and 94.4 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 24167.60 ms. Allocated memory was 134.2 MB in the beginning and 195.0 MB in the end (delta: 60.8 MB). Free memory was 94.0 MB in the beginning and 100.8 MB in the end (delta: -6.8 MB). Peak memory consumption was 55.7 MB. Max. memory is 16.1 GB. * Witness Printer took 4.24 ms. Allocated memory is still 195.0 MB. Free memory was 100.8 MB in the beginning and 99.8 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 33]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L37] signed long long ARR_SIZE ; [L41] ARR_SIZE = (signed long long)__VERIFIER_nondet_short() [L31] COND FALSE !(!cond) [L44] int array1[ARR_SIZE] ; [L45] int array2[ARR_SIZE] ; [L46] int count = 0, num = -1 ; [L47] signed long long sum = 0 ; [L48] int temp ; [L49] short index ; [L51] count=0 [L51] COND TRUE count main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9650f598-7271-4569-9943-bcce61f17f67/bin/uautomizer-IVEQpCNsaX 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 -> 81db346fb66b40514998cf838e858b3f0793fe5c74d5812efa60193ab54d6833 [2021-11-09 08:35:26,260 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 08:35:26,313 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 08:35:26,318 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 08:35:26,320 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 08:35:26,321 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 08:35:26,322 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9650f598-7271-4569-9943-bcce61f17f67/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/array-patterns/array6_pattern.c [2021-11-09 08:35:26,423 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9650f598-7271-4569-9943-bcce61f17f67/bin/uautomizer-IVEQpCNsaX/data/1257efd48/13f80be0c0274dcaa61410e5e664e78a/FLAG6d652c18e [2021-11-09 08:35:27,075 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 08:35:27,078 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9650f598-7271-4569-9943-bcce61f17f67/sv-benchmarks/c/array-patterns/array6_pattern.c [2021-11-09 08:35:27,088 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9650f598-7271-4569-9943-bcce61f17f67/bin/uautomizer-IVEQpCNsaX/data/1257efd48/13f80be0c0274dcaa61410e5e664e78a/FLAG6d652c18e [2021-11-09 08:35:27,381 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9650f598-7271-4569-9943-bcce61f17f67/bin/uautomizer-IVEQpCNsaX/data/1257efd48/13f80be0c0274dcaa61410e5e664e78a [2021-11-09 08:35:27,385 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 08:35:27,388 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-09 08:35:27,390 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 08:35:27,390 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 08:35:27,395 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 08:35:27,396 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 08:35:27" (1/1) ... [2021-11-09 08:35:27,398 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a5b4b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:35:27, skipping insertion in model container [2021-11-09 08:35:27,398 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 08:35:27" (1/1) ... [2021-11-09 08:35:27,408 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 08:35:27,434 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 08:35:27,667 WARN L228 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_9650f598-7271-4569-9943-bcce61f17f67/sv-benchmarks/c/array-patterns/array6_pattern.c[1356,1369] [2021-11-09 08:35:27,715 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 08:35:27,740 INFO L203 MainTranslator]: Completed pre-run [2021-11-09 08:35:27,763 WARN L228 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_9650f598-7271-4569-9943-bcce61f17f67/sv-benchmarks/c/array-patterns/array6_pattern.c[1356,1369] [2021-11-09 08:35:27,800 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 08:35:27,826 INFO L208 MainTranslator]: Completed translation [2021-11-09 08:35:27,827 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:35:27 WrapperNode [2021-11-09 08:35:27,827 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 08:35:27,829 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-09 08:35:27,829 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-09 08:35:27,829 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-09 08:35:27,838 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:35:27" (1/1) ... [2021-11-09 08:35:27,866 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:35:27" (1/1) ... [2021-11-09 08:35:27,911 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-09 08:35:27,914 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-09 08:35:27,914 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-09 08:35:27,914 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-09 08:35:27,925 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:35:27" (1/1) ... [2021-11-09 08:35:27,925 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:35:27" (1/1) ... [2021-11-09 08:35:27,938 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:35:27" (1/1) ... [2021-11-09 08:35:27,939 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:35:27" (1/1) ... [2021-11-09 08:35:27,959 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:35:27" (1/1) ... [2021-11-09 08:35:27,975 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:35:27" (1/1) ... [2021-11-09 08:35:27,978 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:35:27" (1/1) ... [2021-11-09 08:35:27,989 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-09 08:35:27,996 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-09 08:35:27,996 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-09 08:35:27,997 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-09 08:35:27,998 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:35:27" (1/1) ... [2021-11-09 08:35:28,006 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 08:35:28,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9650f598-7271-4569-9943-bcce61f17f67/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:35:28,034 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9650f598-7271-4569-9943-bcce61f17f67/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-09 08:35:28,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9650f598-7271-4569-9943-bcce61f17f67/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-09 08:35:28,094 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-09 08:35:28,094 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-09 08:35:28,094 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-09 08:35:28,094 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-09 08:35:28,095 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-09 08:35:28,095 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-09 08:35:28,095 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-09 08:35:28,542 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-09 08:35:28,543 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-11-09 08:35:28,545 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 08:35:28 BoogieIcfgContainer [2021-11-09 08:35:28,545 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-09 08:35:28,547 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-09 08:35:28,548 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-09 08:35:28,551 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-09 08:35:28,552 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 08:35:27" (1/3) ... [2021-11-09 08:35:28,553 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6949819 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 08:35:28, skipping insertion in model container [2021-11-09 08:35:28,553 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:35:27" (2/3) ... [2021-11-09 08:35:28,554 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6949819 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 08:35:28, skipping insertion in model container [2021-11-09 08:35:28,575 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 08:35:28" (3/3) ... [2021-11-09 08:35:28,577 INFO L111 eAbstractionObserver]: Analyzing ICFG array6_pattern.c [2021-11-09 08:35:28,584 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-09 08:35:28,584 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-09 08:35:28,643 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-09 08:35:28,657 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-09 08:35:28,658 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-09 08:35:28,675 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:28,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-09 08:35:28,681 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:35:28,682 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:35:28,682 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:35:28,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:35:28,689 INFO L85 PathProgramCache]: Analyzing trace with hash 555623354, now seen corresponding path program 1 times [2021-11-09 08:35:28,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 08:35:28,704 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [114286630] [2021-11-09 08:35:28,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:35:28,706 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 08:35:28,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9650f598-7271-4569-9943-bcce61f17f67/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 08:35:28,710 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9650f598-7271-4569-9943-bcce61f17f67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 08:35:28,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9650f598-7271-4569-9943-bcce61f17f67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-09 08:35:28,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:35:28,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-09 08:35:28,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:35:28,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:35:28,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 08:35:28,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:35:28,952 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 08:35:28,952 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [114286630] [2021-11-09 08:35:28,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [114286630] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 08:35:28,954 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:35:28,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-09 08:35:28,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423297441] [2021-11-09 08:35:28,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-09 08:35:28,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 08:35:28,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-09 08:35:28,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-09 08:35:28,983 INFO L87 Difference]: Start difference. First operand has 21 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:29,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:35:29,002 INFO L93 Difference]: Finished difference Result 39 states and 56 transitions. [2021-11-09 08:35:29,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-09 08:35:29,004 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-09 08:35:29,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:35:29,014 INFO L225 Difference]: With dead ends: 39 [2021-11-09 08:35:29,014 INFO L226 Difference]: Without dead ends: 17 [2021-11-09 08:35:29,018 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-09 08:35:29,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-09 08:35:29,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-11-09 08:35:29,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:29,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-11-09 08:35:29,055 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2021-11-09 08:35:29,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:35:29,056 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-11-09 08:35:29,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:29,056 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-11-09 08:35:29,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-09 08:35:29,057 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:35:29,058 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:35:29,075 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9650f598-7271-4569-9943-bcce61f17f67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-09 08:35:29,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9650f598-7271-4569-9943-bcce61f17f67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 08:35:29,271 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:35:29,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:35:29,272 INFO L85 PathProgramCache]: Analyzing trace with hash 2030844390, now seen corresponding path program 1 times [2021-11-09 08:35:29,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 08:35:29,273 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [343762056] [2021-11-09 08:35:29,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:35:29,274 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 08:35:29,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9650f598-7271-4569-9943-bcce61f17f67/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 08:35:29,277 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9650f598-7271-4569-9943-bcce61f17f67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 08:35:29,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9650f598-7271-4569-9943-bcce61f17f67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-09 08:35:29,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:35:29,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-09 08:35:29,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:35:29,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:35:29,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 08:35:29,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:35:29,602 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 08:35:29,602 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [343762056] [2021-11-09 08:35:29,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [343762056] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 08:35:29,603 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:35:29,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-09 08:35:29,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067259945] [2021-11-09 08:35:29,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 08:35:29,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 08:35:29,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 08:35:29,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-09 08:35:29,607 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:29,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:35:29,661 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2021-11-09 08:35:29,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:35:29,662 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-09 08:35:29,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:35:29,663 INFO L225 Difference]: With dead ends: 22 [2021-11-09 08:35:29,663 INFO L226 Difference]: Without dead ends: 18 [2021-11-09 08:35:29,664 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-09 08:35:29,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-09 08:35:29,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-11-09 08:35:29,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:29,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2021-11-09 08:35:29,670 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 14 [2021-11-09 08:35:29,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:35:29,671 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2021-11-09 08:35:29,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:29,672 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2021-11-09 08:35:29,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-09 08:35:29,673 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:35:29,673 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:35:29,691 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9650f598-7271-4569-9943-bcce61f17f67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-09 08:35:29,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9650f598-7271-4569-9943-bcce61f17f67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 08:35:29,887 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:35:29,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:35:29,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1779540136, now seen corresponding path program 1 times [2021-11-09 08:35:29,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 08:35:29,889 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [91080469] [2021-11-09 08:35:29,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:35:29,890 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 08:35:29,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9650f598-7271-4569-9943-bcce61f17f67/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 08:35:29,891 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9650f598-7271-4569-9943-bcce61f17f67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 08:35:29,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9650f598-7271-4569-9943-bcce61f17f67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-09 08:35:29,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:35:29,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-09 08:35:30,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:35:30,353 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 08:35:30,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 08:35:30,591 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 08:35:30,592 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 08:35:30,592 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [91080469] [2021-11-09 08:35:30,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [91080469] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 08:35:30,593 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:35:30,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-09 08:35:30,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213815287] [2021-11-09 08:35:30,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-09 08:35:30,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 08:35:30,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-09 08:35:30,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-09 08:35:30,598 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:31,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:35:31,104 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2021-11-09 08:35:31,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-09 08:35:31,105 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-09 08:35:31,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:35:31,106 INFO L225 Difference]: With dead ends: 34 [2021-11-09 08:35:31,106 INFO L226 Difference]: Without dead ends: 22 [2021-11-09 08:35:31,107 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2021-11-09 08:35:31,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-11-09 08:35:31,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 19. [2021-11-09 08:35:31,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:31,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-11-09 08:35:31,113 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 16 [2021-11-09 08:35:31,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:35:31,113 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-11-09 08:35:31,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:31,114 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-11-09 08:35:31,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-09 08:35:31,114 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:35:31,114 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:35:31,131 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9650f598-7271-4569-9943-bcce61f17f67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-09 08:35:31,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9650f598-7271-4569-9943-bcce61f17f67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 08:35:31,315 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:35:31,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:35:31,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1277885066, now seen corresponding path program 1 times [2021-11-09 08:35:31,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 08:35:31,317 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [601676879] [2021-11-09 08:35:31,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:35:31,317 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 08:35:31,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9650f598-7271-4569-9943-bcce61f17f67/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 08:35:31,319 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9650f598-7271-4569-9943-bcce61f17f67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 08:35:31,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9650f598-7271-4569-9943-bcce61f17f67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-09 08:35:31,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:35:31,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-09 08:35:31,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:35:32,015 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 08:35:32,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 08:35:32,810 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 08:35:32,811 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 08:35:32,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [601676879] [2021-11-09 08:35:32,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [601676879] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-09 08:35:32,812 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:35:32,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-11-09 08:35:32,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329544438] [2021-11-09 08:35:32,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-09 08:35:32,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 08:35:32,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-09 08:35:32,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-11-09 08:35:32,817 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:34,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:35:34,738 INFO L93 Difference]: Finished difference Result 52 states and 57 transitions. [2021-11-09 08:35:34,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-09 08:35:34,748 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-09 08:35:34,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:35:34,749 INFO L225 Difference]: With dead ends: 52 [2021-11-09 08:35:34,749 INFO L226 Difference]: Without dead ends: 36 [2021-11-09 08:35:34,750 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2021-11-09 08:35:34,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-11-09 08:35:34,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 23. [2021-11-09 08:35:34,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:34,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2021-11-09 08:35:34,756 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 18 [2021-11-09 08:35:34,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:35:34,756 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2021-11-09 08:35:34,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:34,757 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2021-11-09 08:35:34,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-09 08:35:34,758 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:35:34,758 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:35:34,774 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9650f598-7271-4569-9943-bcce61f17f67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-09 08:35:34,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9650f598-7271-4569-9943-bcce61f17f67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 08:35:34,974 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:35:34,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:35:34,975 INFO L85 PathProgramCache]: Analyzing trace with hash 764083406, now seen corresponding path program 2 times [2021-11-09 08:35:34,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 08:35:34,975 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [121456552] [2021-11-09 08:35:34,976 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:35:34,976 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 08:35:34,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9650f598-7271-4569-9943-bcce61f17f67/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 08:35:34,977 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9650f598-7271-4569-9943-bcce61f17f67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 08:35:34,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9650f598-7271-4569-9943-bcce61f17f67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-09 08:35:35,176 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:35:35,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:35:35,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-09 08:35:35,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:35:35,953 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:35:35,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 08:35:36,589 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:35:36,590 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 08:35:36,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [121456552] [2021-11-09 08:35:36,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [121456552] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-09 08:35:36,590 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:35:36,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2021-11-09 08:35:36,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989409903] [2021-11-09 08:35:36,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-09 08:35:36,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 08:35:36,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-09 08:35:36,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2021-11-09 08:35:36,592 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:38,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:35:38,858 INFO L93 Difference]: Finished difference Result 61 states and 69 transitions. [2021-11-09 08:35:38,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-09 08:35:38,859 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-09 08:35:38,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:35:38,861 INFO L225 Difference]: With dead ends: 61 [2021-11-09 08:35:38,861 INFO L226 Difference]: Without dead ends: 55 [2021-11-09 08:35:38,862 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=364, Invalid=1118, Unknown=0, NotChecked=0, Total=1482 [2021-11-09 08:35:38,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-11-09 08:35:38,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 39. [2021-11-09 08:35:38,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 38 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:38,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2021-11-09 08:35:38,874 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 22 [2021-11-09 08:35:38,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:35:38,875 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2021-11-09 08:35:38,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:38,875 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2021-11-09 08:35:38,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-09 08:35:38,876 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:35:38,877 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:35:38,890 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9650f598-7271-4569-9943-bcce61f17f67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-09 08:35:39,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9650f598-7271-4569-9943-bcce61f17f67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 08:35:39,088 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:35:39,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:35:39,088 INFO L85 PathProgramCache]: Analyzing trace with hash -102020720, now seen corresponding path program 3 times [2021-11-09 08:35:39,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 08:35:39,093 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1774986047] [2021-11-09 08:35:39,093 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:35:39,093 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 08:35:39,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9650f598-7271-4569-9943-bcce61f17f67/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 08:35:39,094 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9650f598-7271-4569-9943-bcce61f17f67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 08:35:39,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9650f598-7271-4569-9943-bcce61f17f67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-09 08:35:39,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-09 08:35:39,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:35:39,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-09 08:35:39,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:35:40,516 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-09 08:35:40,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 08:35:41,470 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-09 08:35:41,470 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 08:35:41,471 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1774986047] [2021-11-09 08:35:41,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1774986047] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-09 08:35:41,471 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:35:41,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-11-09 08:35:41,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974382105] [2021-11-09 08:35:41,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-09 08:35:41,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 08:35:41,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-09 08:35:41,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2021-11-09 08:35:41,474 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:43,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:35:43,044 INFO L93 Difference]: Finished difference Result 50 states and 55 transitions. [2021-11-09 08:35:43,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-09 08:35:43,046 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-09 08:35:43,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:35:43,047 INFO L225 Difference]: With dead ends: 50 [2021-11-09 08:35:43,047 INFO L226 Difference]: Without dead ends: 46 [2021-11-09 08:35:43,048 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=181, Invalid=371, Unknown=0, NotChecked=0, Total=552 [2021-11-09 08:35:43,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-11-09 08:35:43,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 41. [2021-11-09 08:35:43,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.125) internal successors, (45), 40 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:43,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2021-11-09 08:35:43,059 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 24 [2021-11-09 08:35:43,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:35:43,060 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2021-11-09 08:35:43,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:43,060 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2021-11-09 08:35:43,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-09 08:35:43,062 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:35:43,062 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:35:43,082 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9650f598-7271-4569-9943-bcce61f17f67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-09 08:35:43,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9650f598-7271-4569-9943-bcce61f17f67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 08:35:43,278 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:35:43,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:35:43,278 INFO L85 PathProgramCache]: Analyzing trace with hash 795569618, now seen corresponding path program 4 times [2021-11-09 08:35:43,279 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 08:35:43,279 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1113518111] [2021-11-09 08:35:43,279 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 08:35:43,279 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 08:35:43,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9650f598-7271-4569-9943-bcce61f17f67/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 08:35:43,280 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9650f598-7271-4569-9943-bcce61f17f67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 08:35:43,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9650f598-7271-4569-9943-bcce61f17f67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-09 08:35:43,683 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 08:35:43,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:35:43,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-09 08:35:43,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:35:43,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-09 08:35:44,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:35:44,022 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 49 treesize of output 29 [2021-11-09 08:35:44,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:44,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:44,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:44,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 70 [2021-11-09 08:35:45,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:45,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:45,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:45,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:45,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:45,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:45,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:45,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:35:45,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:35:45,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:45,620 INFO L354 Elim1Store]: treesize reduction 41, result has 21.2 percent of original size [2021-11-09 08:35:45,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 71 [2021-11-09 08:35:47,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:47,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:35:47,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:47,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:47,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:47,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:47,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:35:48,758 INFO L354 Elim1Store]: treesize reduction 4890, result has 4.6 percent of original size [2021-11-09 08:35:48,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 10 select indices, 10 select index equivalence classes, 3 disjoint index pairs (out of 45 index pairs), introduced 14 new quantified variables, introduced 89 case distinctions, treesize of input 653 treesize of output 473 [2021-11-09 08:35:49,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:49,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:49,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:35:49,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:49,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:49,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:49,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:49,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:49,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 7 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 218 treesize of output 149 [2021-11-09 08:35:49,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:49,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:49,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:49,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:35:49,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:49,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:49,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:49,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:49,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 7 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 189 treesize of output 136 [2021-11-09 08:35:49,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:49,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:49,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:49,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:49,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:49,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:35:49,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:49,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:49,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:35:49,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:35:49,625 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-09 08:35:49,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 5 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 199 treesize of output 121 [2021-11-09 08:35:52,513 INFO L354 Elim1Store]: treesize reduction 271, result has 2.9 percent of original size [2021-11-09 08:35:52,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 129 treesize of output 59 [2021-11-09 08:35:52,729 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:35:52,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 08:36:51,049 WARN L860 $PredicateComparison]: unable to prove that (or (not (bvslt ((_ sign_extend 32) (bvadd (_ bv1 32) c_ULTIMATE.start_main_~count~0)) c_~ARR_SIZE~0)) (bvslt ((_ sign_extend 32) (bvadd (_ bv2 32) c_ULTIMATE.start_main_~count~0)) c_~ARR_SIZE~0) (not (bvslt ((_ sign_extend 32) c_ULTIMATE.start_main_~count~0) c_~ARR_SIZE~0)) (forall ((v_ULTIMATE.start_main_~index~0_19 (_ BitVec 16))) (let ((.cse13 ((_ sign_extend 16) v_ULTIMATE.start_main_~index~0_19))) (or (= (bvadd ((_ sign_extend 32) (_ bv4294967294 32)) ((_ sign_extend 32) (_ bv2 32))) (let ((.cse4 (bvmul .cse13 (_ bv4 32)))) (let ((.cse2 (let ((.cse5 (let ((.cse9 (bvmul c_ULTIMATE.start_main_~num~0 (bvadd (_ bv1 32) c_ULTIMATE.start_main_~count~0))) (.cse8 (bvmul c_ULTIMATE.start_main_~count~0 (_ bv4 32)))) (let ((.cse7 (let ((.cse10 (let ((.cse12 (bvmul c_ULTIMATE.start_main_~num~0 c_ULTIMATE.start_main_~count~0))) (let ((.cse11 (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0.base|) (bvadd |c_ULTIMATE.start_main_~#array1~0.offset| .cse8) (bvmul c_ULTIMATE.start_main_~num~0 .cse12))))) (store .cse11 |c_ULTIMATE.start_main_~#array2~0.base| (store (select .cse11 |c_ULTIMATE.start_main_~#array2~0.base|) (bvadd |c_ULTIMATE.start_main_~#array2~0.offset| .cse8) .cse12)))))) (store .cse10 |c_ULTIMATE.start_main_~#array1~0.base| (store (select .cse10 |c_ULTIMATE.start_main_~#array1~0.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~#array1~0.offset| .cse8) (bvmul c_ULTIMATE.start_main_~num~0 .cse9)))))) (store .cse7 |c_ULTIMATE.start_main_~#array2~0.base| (store (select .cse7 |c_ULTIMATE.start_main_~#array2~0.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~#array2~0.offset| .cse8) .cse9)))))) (store .cse5 |c_ULTIMATE.start_main_~#array1~0.base| (let ((.cse6 (select .cse5 |c_ULTIMATE.start_main_~#array1~0.base|))) (store .cse6 (bvadd |c_ULTIMATE.start_main_~#array1~0.offset| .cse4) (bvadd (select .cse6 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~#array1~0.offset| .cse4)) (select .cse6 (bvadd (_ bv4294967292 32) |c_ULTIMATE.start_main_~#array1~0.offset| .cse4))))))))) (let ((.cse1 (let ((.cse3 (select .cse2 |c_ULTIMATE.start_main_~#array2~0.base|))) (store .cse3 (bvadd |c_ULTIMATE.start_main_~#array2~0.offset| .cse4) (bvadd (select .cse3 (bvadd (_ bv4294967292 32) |c_ULTIMATE.start_main_~#array2~0.offset| .cse4)) (select .cse3 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~#array2~0.offset| .cse4))))))) (let ((.cse0 (select (store .cse2 |c_ULTIMATE.start_main_~#array2~0.base| .cse1) |c_ULTIMATE.start_main_~#array1~0.base|))) (bvadd ((_ sign_extend 32) (select .cse0 (bvadd |c_ULTIMATE.start_main_~#array1~0.offset| (_ bv8 32)))) ((_ sign_extend 32) (select .cse1 |c_ULTIMATE.start_main_~#array2~0.offset|)) ((_ sign_extend 32) (select .cse1 (bvadd |c_ULTIMATE.start_main_~#array2~0.offset| (_ bv8 32)))) c_ULTIMATE.start_main_~sum~0 ((_ sign_extend 32) (select .cse0 |c_ULTIMATE.start_main_~#array1~0.offset|)) ((_ sign_extend 32) (select .cse1 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~#array2~0.offset|))) ((_ sign_extend 32) (select .cse0 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~#array1~0.offset|))))))))) (not (bvslt ((_ sign_extend 32) .cse13) (bvadd c_~ARR_SIZE~0 (_ bv18446744073709551615 64)))) (not (bvsgt .cse13 (_ bv0 32))))))) is different from true [2021-11-09 08:37:00,744 WARN L860 $PredicateComparison]: unable to prove that (or (forall ((v_ULTIMATE.start_main_~index~0_19 (_ BitVec 16))) (let ((.cse0 ((_ sign_extend 16) v_ULTIMATE.start_main_~index~0_19))) (or (not (bvslt ((_ sign_extend 32) .cse0) (bvadd c_~ARR_SIZE~0 (_ bv18446744073709551615 64)))) (= (bvadd ((_ sign_extend 32) (_ bv4294967294 32)) ((_ sign_extend 32) (_ bv2 32))) (let ((.cse5 (bvmul .cse0 (_ bv4 32)))) (let ((.cse3 (let ((.cse6 (let ((.cse10 (bvmul c_ULTIMATE.start_main_~num~0 (bvadd (_ bv2 32) c_ULTIMATE.start_main_~count~0))) (.cse9 (bvmul c_ULTIMATE.start_main_~count~0 (_ bv4 32)))) (let ((.cse8 (let ((.cse11 (let ((.cse13 (bvmul c_ULTIMATE.start_main_~num~0 (bvadd (_ bv1 32) c_ULTIMATE.start_main_~count~0)))) (let ((.cse12 (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~#array1~0.offset| .cse9) (bvmul c_ULTIMATE.start_main_~num~0 .cse13))))) (store .cse12 |c_ULTIMATE.start_main_~#array2~0.base| (store (select .cse12 |c_ULTIMATE.start_main_~#array2~0.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~#array2~0.offset| .cse9) .cse13)))))) (store .cse11 |c_ULTIMATE.start_main_~#array1~0.base| (store (select .cse11 |c_ULTIMATE.start_main_~#array1~0.base|) (bvadd |c_ULTIMATE.start_main_~#array1~0.offset| (_ bv8 32) .cse9) (bvmul c_ULTIMATE.start_main_~num~0 .cse10)))))) (store .cse8 |c_ULTIMATE.start_main_~#array2~0.base| (store (select .cse8 |c_ULTIMATE.start_main_~#array2~0.base|) (bvadd |c_ULTIMATE.start_main_~#array2~0.offset| (_ bv8 32) .cse9) .cse10)))))) (store .cse6 |c_ULTIMATE.start_main_~#array1~0.base| (let ((.cse7 (select .cse6 |c_ULTIMATE.start_main_~#array1~0.base|))) (store .cse7 (bvadd |c_ULTIMATE.start_main_~#array1~0.offset| .cse5) (bvadd (select .cse7 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~#array1~0.offset| .cse5)) (select .cse7 (bvadd (_ bv4294967292 32) |c_ULTIMATE.start_main_~#array1~0.offset| .cse5))))))))) (let ((.cse1 (let ((.cse4 (select .cse3 |c_ULTIMATE.start_main_~#array2~0.base|))) (store .cse4 (bvadd |c_ULTIMATE.start_main_~#array2~0.offset| .cse5) (bvadd (select .cse4 (bvadd (_ bv4294967292 32) |c_ULTIMATE.start_main_~#array2~0.offset| .cse5)) (select .cse4 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~#array2~0.offset| .cse5))))))) (let ((.cse2 (select (store .cse3 |c_ULTIMATE.start_main_~#array2~0.base| .cse1) |c_ULTIMATE.start_main_~#array1~0.base|))) (bvadd c_ULTIMATE.start_main_~sum~0 ((_ sign_extend 32) (select .cse1 |c_ULTIMATE.start_main_~#array2~0.offset|)) ((_ sign_extend 32) (select .cse1 (bvadd |c_ULTIMATE.start_main_~#array2~0.offset| (_ bv8 32)))) ((_ sign_extend 32) (select .cse1 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~#array2~0.offset|))) ((_ sign_extend 32) (select .cse2 |c_ULTIMATE.start_main_~#array1~0.offset|)) ((_ sign_extend 32) (select .cse2 (bvadd |c_ULTIMATE.start_main_~#array1~0.offset| (_ bv8 32)))) ((_ sign_extend 32) (select .cse2 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~#array1~0.offset|))))))))) (not (bvsgt .cse0 (_ bv0 32)))))) (not (bvslt ((_ sign_extend 32) (bvadd (_ bv1 32) c_ULTIMATE.start_main_~count~0)) c_~ARR_SIZE~0)) (not (bvslt ((_ sign_extend 32) (bvadd (_ bv2 32) c_ULTIMATE.start_main_~count~0)) c_~ARR_SIZE~0)) (bvslt ((_ sign_extend 32) (bvadd (_ bv3 32) c_ULTIMATE.start_main_~count~0)) c_~ARR_SIZE~0)) is different from true