./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-patterns/array13_pattern.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a9b3ef-cb31-4861-a032-19dfcb83c9d9/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a9b3ef-cb31-4861-a032-19dfcb83c9d9/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a9b3ef-cb31-4861-a032-19dfcb83c9d9/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a9b3ef-cb31-4861-a032-19dfcb83c9d9/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-patterns/array13_pattern.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a9b3ef-cb31-4861-a032-19dfcb83c9d9/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a9b3ef-cb31-4861-a032-19dfcb83c9d9/bin/uautomizer-DQz5hQGWxF --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 78699f7813351c3df7f7fcab3bf98fffd7a92c5cc679034a9d139e9169232d7e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 07:38:26,189 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 07:38:26,192 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 07:38:26,254 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 07:38:26,255 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 07:38:26,259 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 07:38:26,261 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 07:38:26,265 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 07:38:26,268 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 07:38:26,276 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 07:38:26,277 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 07:38:26,279 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 07:38:26,279 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 07:38:26,283 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 07:38:26,285 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 07:38:26,291 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 07:38:26,296 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 07:38:26,298 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 07:38:26,300 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 07:38:26,307 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 07:38:26,309 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 07:38:26,311 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 07:38:26,315 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 07:38:26,316 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 07:38:26,326 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 07:38:26,327 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 07:38:26,327 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 07:38:26,328 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 07:38:26,329 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 07:38:26,330 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 07:38:26,330 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 07:38:26,331 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 07:38:26,332 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 07:38:26,333 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 07:38:26,334 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 07:38:26,335 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 07:38:26,338 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 07:38:26,340 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 07:38:26,340 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 07:38:26,341 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 07:38:26,342 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 07:38:26,342 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a9b3ef-cb31-4861-a032-19dfcb83c9d9/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-20 07:38:26,387 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 07:38:26,391 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 07:38:26,392 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 07:38:26,392 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 07:38:26,393 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 07:38:26,393 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 07:38:26,393 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 07:38:26,394 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 07:38:26,394 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 07:38:26,394 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 07:38:26,394 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 07:38:26,394 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 07:38:26,395 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 07:38:26,395 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 07:38:26,395 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 07:38:26,395 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 07:38:26,395 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 07:38:26,396 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 07:38:26,396 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 07:38:26,396 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 07:38:26,396 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 07:38:26,397 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 07:38:26,397 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 07:38:26,397 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 07:38:26,397 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 07:38:26,397 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 07:38:26,398 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 07:38:26,398 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 07:38:26,398 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 07:38:26,398 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 07:38:26,398 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 07:38:26,399 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 07:38:26,399 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 07:38:26,399 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 07:38:26,399 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_f0a9b3ef-cb31-4861-a032-19dfcb83c9d9/bin/uautomizer-DQz5hQGWxF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a9b3ef-cb31-4861-a032-19dfcb83c9d9/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 78699f7813351c3df7f7fcab3bf98fffd7a92c5cc679034a9d139e9169232d7e [2021-11-20 07:38:26,695 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 07:38:26,716 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 07:38:26,719 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 07:38:26,721 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 07:38:26,722 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 07:38:26,723 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a9b3ef-cb31-4861-a032-19dfcb83c9d9/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/array-patterns/array13_pattern.c [2021-11-20 07:38:26,807 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a9b3ef-cb31-4861-a032-19dfcb83c9d9/bin/uautomizer-DQz5hQGWxF/data/2cc01fb33/efa07b996d7e418db6162917ec2e3bb9/FLAG638ddcb73 [2021-11-20 07:38:27,331 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 07:38:27,332 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a9b3ef-cb31-4861-a032-19dfcb83c9d9/sv-benchmarks/c/array-patterns/array13_pattern.c [2021-11-20 07:38:27,339 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a9b3ef-cb31-4861-a032-19dfcb83c9d9/bin/uautomizer-DQz5hQGWxF/data/2cc01fb33/efa07b996d7e418db6162917ec2e3bb9/FLAG638ddcb73 [2021-11-20 07:38:27,678 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a9b3ef-cb31-4861-a032-19dfcb83c9d9/bin/uautomizer-DQz5hQGWxF/data/2cc01fb33/efa07b996d7e418db6162917ec2e3bb9 [2021-11-20 07:38:27,681 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 07:38:27,694 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 07:38:27,698 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 07:38:27,699 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 07:38:27,703 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 07:38:27,704 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:38:27" (1/1) ... [2021-11-20 07:38:27,707 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10fe824d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:38:27, skipping insertion in model container [2021-11-20 07:38:27,707 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:38:27" (1/1) ... [2021-11-20 07:38:27,716 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 07:38:27,735 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 07:38:27,892 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a9b3ef-cb31-4861-a032-19dfcb83c9d9/sv-benchmarks/c/array-patterns/array13_pattern.c[1342,1355] [2021-11-20 07:38:27,941 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 07:38:27,949 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 07:38:27,964 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a9b3ef-cb31-4861-a032-19dfcb83c9d9/sv-benchmarks/c/array-patterns/array13_pattern.c[1342,1355] [2021-11-20 07:38:27,977 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 07:38:27,993 INFO L208 MainTranslator]: Completed translation [2021-11-20 07:38:27,994 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:38:27 WrapperNode [2021-11-20 07:38:27,994 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 07:38:27,996 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 07:38:27,996 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 07:38:27,996 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 07:38:28,005 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:38:27" (1/1) ... [2021-11-20 07:38:28,014 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:38:27" (1/1) ... [2021-11-20 07:38:28,039 INFO L137 Inliner]: procedures = 16, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 95 [2021-11-20 07:38:28,040 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 07:38:28,040 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 07:38:28,041 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 07:38:28,041 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 07:38:28,050 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:38:27" (1/1) ... [2021-11-20 07:38:28,050 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:38:27" (1/1) ... [2021-11-20 07:38:28,053 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:38:27" (1/1) ... [2021-11-20 07:38:28,054 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:38:27" (1/1) ... [2021-11-20 07:38:28,059 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:38:27" (1/1) ... [2021-11-20 07:38:28,065 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:38:27" (1/1) ... [2021-11-20 07:38:28,072 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:38:27" (1/1) ... [2021-11-20 07:38:28,074 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 07:38:28,086 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 07:38:28,086 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 07:38:28,086 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 07:38:28,087 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:38:27" (1/1) ... [2021-11-20 07:38:28,096 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 07:38:28,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a9b3ef-cb31-4861-a032-19dfcb83c9d9/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:38:28,124 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a9b3ef-cb31-4861-a032-19dfcb83c9d9/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 07:38:28,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a9b3ef-cb31-4861-a032-19dfcb83c9d9/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 07:38:28,175 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 07:38:28,176 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-20 07:38:28,176 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-20 07:38:28,176 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 07:38:28,176 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 07:38:28,177 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 07:38:28,178 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 07:38:28,179 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 07:38:28,179 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 07:38:28,179 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 07:38:28,277 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 07:38:28,279 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 07:38:28,496 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 07:38:28,503 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 07:38:28,504 INFO L301 CfgBuilder]: Removed 5 assume(true) statements. [2021-11-20 07:38:28,506 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:38:28 BoogieIcfgContainer [2021-11-20 07:38:28,506 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 07:38:28,508 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 07:38:28,509 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 07:38:28,513 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 07:38:28,513 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 07:38:27" (1/3) ... [2021-11-20 07:38:28,514 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@86d4c42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:38:28, skipping insertion in model container [2021-11-20 07:38:28,514 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:38:27" (2/3) ... [2021-11-20 07:38:28,515 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@86d4c42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:38:28, skipping insertion in model container [2021-11-20 07:38:28,515 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:38:28" (3/3) ... [2021-11-20 07:38:28,517 INFO L111 eAbstractionObserver]: Analyzing ICFG array13_pattern.c [2021-11-20 07:38:28,523 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 07:38:28,523 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 07:38:28,618 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 07:38:28,626 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 [2021-11-20 07:38:28,639 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 07:38:28,658 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 25 states have (on average 1.6) internal successors, (40), 26 states have internal predecessors, (40), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:38:28,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-20 07:38:28,665 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:38:28,666 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:38:28,666 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:38:28,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:38:28,673 INFO L85 PathProgramCache]: Analyzing trace with hash -152131175, now seen corresponding path program 1 times [2021-11-20 07:38:28,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:38:28,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637390093] [2021-11-20 07:38:28,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:38:28,686 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:38:28,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:38:28,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:38:28,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:38:28,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:38:28,847 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:38:28,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637390093] [2021-11-20 07:38:28,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637390093] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:38:28,848 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:38:28,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 07:38:28,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704744891] [2021-11-20 07:38:28,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:38:28,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-20 07:38:28,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:38:28,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-20 07:38:28,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 07:38:28,902 INFO L87 Difference]: Start difference. First operand has 31 states, 25 states have (on average 1.6) internal successors, (40), 26 states have internal predecessors, (40), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 07:38:28,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:38:28,932 INFO L93 Difference]: Finished difference Result 59 states and 91 transitions. [2021-11-20 07:38:28,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 07:38:28,936 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-11-20 07:38:28,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:38:28,949 INFO L225 Difference]: With dead ends: 59 [2021-11-20 07:38:28,949 INFO L226 Difference]: Without dead ends: 27 [2021-11-20 07:38:28,959 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 07:38:28,966 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:38:28,968 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:38:28,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-20 07:38:29,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-11-20 07:38:29,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:38:29,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2021-11-20 07:38:29,036 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 15 [2021-11-20 07:38:29,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:38:29,037 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2021-11-20 07:38:29,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 07:38:29,038 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2021-11-20 07:38:29,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-20 07:38:29,041 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:38:29,042 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:38:29,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 07:38:29,043 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:38:29,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:38:29,048 INFO L85 PathProgramCache]: Analyzing trace with hash -2136147464, now seen corresponding path program 1 times [2021-11-20 07:38:29,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:38:29,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718687932] [2021-11-20 07:38:29,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:38:29,049 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:38:29,095 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:38:29,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1519305289] [2021-11-20 07:38:29,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:38:29,098 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:38:29,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a9b3ef-cb31-4861-a032-19dfcb83c9d9/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:38:29,108 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a9b3ef-cb31-4861-a032-19dfcb83c9d9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:38:29,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a9b3ef-cb31-4861-a032-19dfcb83c9d9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 07:38:29,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:38:29,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 07:38:29,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:38:29,432 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 07:38:29,433 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:38:29,433 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:38:29,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718687932] [2021-11-20 07:38:29,434 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:38:29,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519305289] [2021-11-20 07:38:29,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519305289] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:38:29,437 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:38:29,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 07:38:29,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458457564] [2021-11-20 07:38:29,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:38:29,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 07:38:29,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:38:29,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 07:38:29,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-20 07:38:29,444 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 07:38:29,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:38:29,636 INFO L93 Difference]: Finished difference Result 58 states and 72 transitions. [2021-11-20 07:38:29,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 07:38:29,637 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2021-11-20 07:38:29,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:38:29,638 INFO L225 Difference]: With dead ends: 58 [2021-11-20 07:38:29,638 INFO L226 Difference]: Without dead ends: 39 [2021-11-20 07:38:29,639 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-11-20 07:38:29,641 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 37 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:38:29,642 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 56 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:38:29,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-11-20 07:38:29,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 33. [2021-11-20 07:38:29,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 27 states have internal predecessors, (33), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:38:29,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2021-11-20 07:38:29,652 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 28 [2021-11-20 07:38:29,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:38:29,652 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2021-11-20 07:38:29,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 07:38:29,653 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2021-11-20 07:38:29,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-20 07:38:29,654 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:38:29,654 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:38:29,692 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a9b3ef-cb31-4861-a032-19dfcb83c9d9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 07:38:29,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a9b3ef-cb31-4861-a032-19dfcb83c9d9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:38:29,880 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:38:29,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:38:29,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1984127527, now seen corresponding path program 1 times [2021-11-20 07:38:29,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:38:29,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119563570] [2021-11-20 07:38:29,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:38:29,882 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:38:29,893 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:38:29,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [276659685] [2021-11-20 07:38:29,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:38:29,894 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:38:29,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a9b3ef-cb31-4861-a032-19dfcb83c9d9/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:38:29,895 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a9b3ef-cb31-4861-a032-19dfcb83c9d9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:38:29,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a9b3ef-cb31-4861-a032-19dfcb83c9d9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 07:38:29,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:38:29,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 07:38:29,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:38:30,136 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 07:38:30,136 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:38:30,137 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:38:30,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119563570] [2021-11-20 07:38:30,137 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:38:30,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276659685] [2021-11-20 07:38:30,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276659685] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:38:30,138 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:38:30,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 07:38:30,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790719668] [2021-11-20 07:38:30,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:38:30,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 07:38:30,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:38:30,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 07:38:30,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 07:38:30,141 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 07:38:30,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:38:30,214 INFO L93 Difference]: Finished difference Result 61 states and 75 transitions. [2021-11-20 07:38:30,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 07:38:30,215 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 34 [2021-11-20 07:38:30,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:38:30,216 INFO L225 Difference]: With dead ends: 61 [2021-11-20 07:38:30,217 INFO L226 Difference]: Without dead ends: 37 [2021-11-20 07:38:30,217 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:38:30,219 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 23 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:38:30,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 48 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:38:30,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-11-20 07:38:30,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2021-11-20 07:38:30,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 29 states have (on average 1.206896551724138) internal successors, (35), 29 states have internal predecessors, (35), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:38:30,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2021-11-20 07:38:30,242 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 34 [2021-11-20 07:38:30,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:38:30,242 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2021-11-20 07:38:30,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 07:38:30,245 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2021-11-20 07:38:30,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-20 07:38:30,248 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:38:30,249 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:38:30,284 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a9b3ef-cb31-4861-a032-19dfcb83c9d9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 07:38:30,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a9b3ef-cb31-4861-a032-19dfcb83c9d9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:38:30,472 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:38:30,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:38:30,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1380575367, now seen corresponding path program 1 times [2021-11-20 07:38:30,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:38:30,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533778237] [2021-11-20 07:38:30,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:38:30,474 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:38:30,495 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:38:30,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [98622807] [2021-11-20 07:38:30,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:38:30,496 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:38:30,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a9b3ef-cb31-4861-a032-19dfcb83c9d9/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:38:30,503 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a9b3ef-cb31-4861-a032-19dfcb83c9d9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:38:30,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a9b3ef-cb31-4861-a032-19dfcb83c9d9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 07:38:30,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:38:30,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-20 07:38:30,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:38:30,999 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 07:38:30,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:38:31,495 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 07:38:31,495 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:38:31,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533778237] [2021-11-20 07:38:31,496 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:38:31,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98622807] [2021-11-20 07:38:31,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98622807] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:38:31,497 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:38:31,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-11-20 07:38:31,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073728328] [2021-11-20 07:38:31,497 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:38:31,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-20 07:38:31,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:38:31,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-20 07:38:31,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-11-20 07:38:31,500 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 18 states, 16 states have (on average 2.4375) internal successors, (39), 13 states have internal predecessors, (39), 4 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-11-20 07:38:32,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:38:32,068 INFO L93 Difference]: Finished difference Result 129 states and 152 transitions. [2021-11-20 07:38:32,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-20 07:38:32,069 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.4375) internal successors, (39), 13 states have internal predecessors, (39), 4 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 38 [2021-11-20 07:38:32,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:38:32,073 INFO L225 Difference]: With dead ends: 129 [2021-11-20 07:38:32,073 INFO L226 Difference]: Without dead ends: 108 [2021-11-20 07:38:32,074 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=189, Invalid=803, Unknown=0, NotChecked=0, Total=992 [2021-11-20 07:38:32,075 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 137 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:38:32,075 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 178 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 07:38:32,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-11-20 07:38:32,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 58. [2021-11-20 07:38:32,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 47 states have (on average 1.2127659574468086) internal successors, (57), 48 states have internal predecessors, (57), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 07:38:32,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 69 transitions. [2021-11-20 07:38:32,094 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 69 transitions. Word has length 38 [2021-11-20 07:38:32,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:38:32,095 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 69 transitions. [2021-11-20 07:38:32,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.4375) internal successors, (39), 13 states have internal predecessors, (39), 4 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-11-20 07:38:32,098 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 69 transitions. [2021-11-20 07:38:32,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-20 07:38:32,099 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:38:32,101 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:38:32,124 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a9b3ef-cb31-4861-a032-19dfcb83c9d9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 07:38:32,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a9b3ef-cb31-4861-a032-19dfcb83c9d9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:38:32,312 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:38:32,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:38:32,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1967381381, now seen corresponding path program 1 times [2021-11-20 07:38:32,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:38:32,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307425539] [2021-11-20 07:38:32,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:38:32,314 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:38:32,326 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:38:32,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1197176807] [2021-11-20 07:38:32,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:38:32,326 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:38:32,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a9b3ef-cb31-4861-a032-19dfcb83c9d9/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:38:32,327 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a9b3ef-cb31-4861-a032-19dfcb83c9d9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:38:32,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a9b3ef-cb31-4861-a032-19dfcb83c9d9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 07:38:32,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:38:32,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-20 07:38:32,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:38:32,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-20 07:38:32,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-20 07:38:33,024 INFO L354 Elim1Store]: treesize reduction 158, result has 23.7 percent of original size [2021-11-20 07:38:33,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 97 treesize of output 109 [2021-11-20 07:38:33,199 INFO L354 Elim1Store]: treesize reduction 47, result has 2.1 percent of original size [2021-11-20 07:38:33,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 101 treesize of output 53 [2021-11-20 07:38:33,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2021-11-20 07:38:33,500 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 07:38:33,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:38:34,310 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:38:34,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 79 treesize of output 79 [2021-11-20 07:38:34,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 4 [2021-11-20 07:38:34,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 4 [2021-11-20 07:38:34,820 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:38:34,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 71 treesize of output 107 [2021-11-20 07:38:40,663 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 07:38:40,664 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:38:40,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307425539] [2021-11-20 07:38:40,664 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:38:40,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197176807] [2021-11-20 07:38:40,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197176807] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:38:40,665 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:38:40,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-11-20 07:38:40,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802275020] [2021-11-20 07:38:40,665 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:38:40,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-20 07:38:40,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:38:40,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-20 07:38:40,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=360, Unknown=1, NotChecked=0, Total=462 [2021-11-20 07:38:40,667 INFO L87 Difference]: Start difference. First operand 58 states and 69 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-20 07:38:44,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:38:44,673 INFO L93 Difference]: Finished difference Result 130 states and 158 transitions. [2021-11-20 07:38:44,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-20 07:38:44,674 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 38 [2021-11-20 07:38:44,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:38:44,676 INFO L225 Difference]: With dead ends: 130 [2021-11-20 07:38:44,677 INFO L226 Difference]: Without dead ends: 124 [2021-11-20 07:38:44,678 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 52 SyntacticMatches, 5 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=386, Invalid=1335, Unknown=1, NotChecked=0, Total=1722 [2021-11-20 07:38:44,679 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 104 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 108 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-20 07:38:44,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 216 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 354 Invalid, 0 Unknown, 108 Unchecked, 1.8s Time] [2021-11-20 07:38:44,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-11-20 07:38:44,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 70. [2021-11-20 07:38:44,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 57 states have (on average 1.2280701754385965) internal successors, (70), 58 states have internal predecessors, (70), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-20 07:38:44,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 86 transitions. [2021-11-20 07:38:44,702 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 86 transitions. Word has length 38 [2021-11-20 07:38:44,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:38:44,702 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 86 transitions. [2021-11-20 07:38:44,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-20 07:38:44,703 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 86 transitions. [2021-11-20 07:38:44,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-20 07:38:44,704 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:38:44,705 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:38:44,746 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a9b3ef-cb31-4861-a032-19dfcb83c9d9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 07:38:44,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a9b3ef-cb31-4861-a032-19dfcb83c9d9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:38:44,920 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:38:44,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:38:44,921 INFO L85 PathProgramCache]: Analyzing trace with hash -707639139, now seen corresponding path program 2 times [2021-11-20 07:38:44,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:38:44,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124438071] [2021-11-20 07:38:44,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:38:44,921 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:38:44,929 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:38:44,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1881293025] [2021-11-20 07:38:44,929 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 07:38:44,929 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:38:44,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a9b3ef-cb31-4861-a032-19dfcb83c9d9/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:38:44,943 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a9b3ef-cb31-4861-a032-19dfcb83c9d9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:38:44,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a9b3ef-cb31-4861-a032-19dfcb83c9d9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 07:38:45,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 07:38:45,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:38:45,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 07:38:45,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:38:45,176 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 07:38:45,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:38:45,289 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 07:38:45,289 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:38:45,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124438071] [2021-11-20 07:38:45,289 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:38:45,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881293025] [2021-11-20 07:38:45,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881293025] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:38:45,290 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:38:45,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-11-20 07:38:45,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593784493] [2021-11-20 07:38:45,291 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:38:45,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 07:38:45,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:38:45,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 07:38:45,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-20 07:38:45,295 INFO L87 Difference]: Start difference. First operand 70 states and 86 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 07:38:45,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:38:45,498 INFO L93 Difference]: Finished difference Result 146 states and 176 transitions. [2021-11-20 07:38:45,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 07:38:45,499 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 40 [2021-11-20 07:38:45,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:38:45,500 INFO L225 Difference]: With dead ends: 146 [2021-11-20 07:38:45,500 INFO L226 Difference]: Without dead ends: 109 [2021-11-20 07:38:45,501 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-11-20 07:38:45,502 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 133 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:38:45,502 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 98 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:38:45,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-11-20 07:38:45,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 83. [2021-11-20 07:38:45,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 70 states have (on average 1.2) internal successors, (84), 71 states have internal predecessors, (84), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-20 07:38:45,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 100 transitions. [2021-11-20 07:38:45,537 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 100 transitions. Word has length 40 [2021-11-20 07:38:45,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:38:45,537 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 100 transitions. [2021-11-20 07:38:45,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 07:38:45,538 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 100 transitions. [2021-11-20 07:38:45,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-20 07:38:45,545 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:38:45,546 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:38:45,590 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a9b3ef-cb31-4861-a032-19dfcb83c9d9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-20 07:38:45,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a9b3ef-cb31-4861-a032-19dfcb83c9d9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-20 07:38:45,763 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:38:45,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:38:45,764 INFO L85 PathProgramCache]: Analyzing trace with hash -291961609, now seen corresponding path program 2 times [2021-11-20 07:38:45,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:38:45,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142306080] [2021-11-20 07:38:45,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:38:45,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:38:45,772 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:38:45,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [466421381] [2021-11-20 07:38:45,773 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 07:38:45,773 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:38:45,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a9b3ef-cb31-4861-a032-19dfcb83c9d9/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:38:45,774 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a9b3ef-cb31-4861-a032-19dfcb83c9d9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:38:45,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a9b3ef-cb31-4861-a032-19dfcb83c9d9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 07:38:45,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 07:38:45,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:38:45,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 07:38:45,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:38:46,019 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 07:38:46,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:38:46,172 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-20 07:38:46,172 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:38:46,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142306080] [2021-11-20 07:38:46,173 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:38:46,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466421381] [2021-11-20 07:38:46,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466421381] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:38:46,173 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:38:46,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-11-20 07:38:46,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657268214] [2021-11-20 07:38:46,174 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:38:46,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-20 07:38:46,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:38:46,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-20 07:38:46,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-11-20 07:38:46,181 INFO L87 Difference]: Start difference. First operand 83 states and 100 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 07:38:46,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:38:46,415 INFO L93 Difference]: Finished difference Result 154 states and 192 transitions. [2021-11-20 07:38:46,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-20 07:38:46,416 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 40 [2021-11-20 07:38:46,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:38:46,418 INFO L225 Difference]: With dead ends: 154 [2021-11-20 07:38:46,418 INFO L226 Difference]: Without dead ends: 113 [2021-11-20 07:38:46,419 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-11-20 07:38:46,420 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 45 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:38:46,420 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 96 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 07:38:46,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-11-20 07:38:46,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 97. [2021-11-20 07:38:46,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 84 states have (on average 1.2142857142857142) internal successors, (102), 85 states have internal predecessors, (102), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-20 07:38:46,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 118 transitions. [2021-11-20 07:38:46,448 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 118 transitions. Word has length 40 [2021-11-20 07:38:46,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:38:46,449 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 118 transitions. [2021-11-20 07:38:46,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 07:38:46,449 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 118 transitions. [2021-11-20 07:38:46,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-20 07:38:46,453 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:38:46,454 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:38:46,488 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a9b3ef-cb31-4861-a032-19dfcb83c9d9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-20 07:38:46,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a9b3ef-cb31-4861-a032-19dfcb83c9d9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-20 07:38:46,680 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:38:46,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:38:46,680 INFO L85 PathProgramCache]: Analyzing trace with hash -967924134, now seen corresponding path program 3 times [2021-11-20 07:38:46,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:38:46,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676387626] [2021-11-20 07:38:46,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:38:46,681 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:38:46,690 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:38:46,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [773499067] [2021-11-20 07:38:46,690 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 07:38:46,691 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:38:46,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a9b3ef-cb31-4861-a032-19dfcb83c9d9/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:38:46,692 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a9b3ef-cb31-4861-a032-19dfcb83c9d9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:38:46,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a9b3ef-cb31-4861-a032-19dfcb83c9d9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-20 07:38:46,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-20 07:38:46,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:38:46,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 07:38:46,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:38:46,930 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-20 07:38:46,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:38:47,033 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-20 07:38:47,034 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:38:47,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676387626] [2021-11-20 07:38:47,034 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:38:47,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773499067] [2021-11-20 07:38:47,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773499067] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:38:47,035 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:38:47,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-11-20 07:38:47,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116422866] [2021-11-20 07:38:47,035 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:38:47,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 07:38:47,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:38:47,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 07:38:47,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-20 07:38:47,037 INFO L87 Difference]: Start difference. First operand 97 states and 118 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-20 07:38:47,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:38:47,179 INFO L93 Difference]: Finished difference Result 136 states and 160 transitions. [2021-11-20 07:38:47,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 07:38:47,179 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 43 [2021-11-20 07:38:47,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:38:47,180 INFO L225 Difference]: With dead ends: 136 [2021-11-20 07:38:47,180 INFO L226 Difference]: Without dead ends: 68 [2021-11-20 07:38:47,181 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-11-20 07:38:47,182 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 33 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:38:47,182 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 92 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:38:47,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-11-20 07:38:47,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2021-11-20 07:38:47,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 58 states have (on average 1.1896551724137931) internal successors, (69), 58 states have internal predecessors, (69), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-20 07:38:47,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 79 transitions. [2021-11-20 07:38:47,195 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 79 transitions. Word has length 43 [2021-11-20 07:38:47,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:38:47,196 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 79 transitions. [2021-11-20 07:38:47,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-20 07:38:47,196 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 79 transitions. [2021-11-20 07:38:47,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-20 07:38:47,197 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:38:47,197 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:38:47,239 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a9b3ef-cb31-4861-a032-19dfcb83c9d9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-20 07:38:47,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a9b3ef-cb31-4861-a032-19dfcb83c9d9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:38:47,420 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:38:47,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:38:47,420 INFO L85 PathProgramCache]: Analyzing trace with hash 441313725, now seen corresponding path program 3 times [2021-11-20 07:38:47,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:38:47,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528879470] [2021-11-20 07:38:47,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:38:47,421 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:38:47,428 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:38:47,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1604233686] [2021-11-20 07:38:47,429 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 07:38:47,429 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:38:47,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a9b3ef-cb31-4861-a032-19dfcb83c9d9/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:38:47,430 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a9b3ef-cb31-4861-a032-19dfcb83c9d9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:38:47,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a9b3ef-cb31-4861-a032-19dfcb83c9d9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-20 07:38:47,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-20 07:38:47,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:38:47,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-20 07:38:47,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:38:47,729 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-20 07:38:47,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:38:48,062 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-20 07:38:48,062 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:38:48,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528879470] [2021-11-20 07:38:48,062 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:38:48,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604233686] [2021-11-20 07:38:48,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604233686] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:38:48,063 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:38:48,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-11-20 07:38:48,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191554214] [2021-11-20 07:38:48,064 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:38:48,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-20 07:38:48,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:38:48,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-20 07:38:48,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-11-20 07:38:48,065 INFO L87 Difference]: Start difference. First operand 66 states and 79 transitions. Second operand has 19 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 14 states have internal predecessors, (45), 3 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-20 07:38:48,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:38:48,440 INFO L93 Difference]: Finished difference Result 96 states and 110 transitions. [2021-11-20 07:38:48,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-20 07:38:48,441 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 14 states have internal predecessors, (45), 3 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 47 [2021-11-20 07:38:48,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:38:48,442 INFO L225 Difference]: With dead ends: 96 [2021-11-20 07:38:48,442 INFO L226 Difference]: Without dead ends: 90 [2021-11-20 07:38:48,443 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=211, Invalid=659, Unknown=0, NotChecked=0, Total=870 [2021-11-20 07:38:48,444 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 106 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:38:48,444 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 123 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 07:38:48,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-11-20 07:38:48,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 53. [2021-11-20 07:38:48,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 47 states have (on average 1.1702127659574468) internal successors, (55), 47 states have internal predecessors, (55), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:38:48,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2021-11-20 07:38:48,456 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 47 [2021-11-20 07:38:48,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:38:48,456 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2021-11-20 07:38:48,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 14 states have internal predecessors, (45), 3 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-20 07:38:48,457 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2021-11-20 07:38:48,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-20 07:38:48,458 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:38:48,458 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:38:48,503 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a9b3ef-cb31-4861-a032-19dfcb83c9d9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-20 07:38:48,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a9b3ef-cb31-4861-a032-19dfcb83c9d9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:38:48,684 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:38:48,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:38:48,684 INFO L85 PathProgramCache]: Analyzing trace with hash -4709032, now seen corresponding path program 4 times [2021-11-20 07:38:48,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:38:48,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565349990] [2021-11-20 07:38:48,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:38:48,685 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:38:48,690 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:38:48,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2086107419] [2021-11-20 07:38:48,691 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 07:38:48,691 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:38:48,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a9b3ef-cb31-4861-a032-19dfcb83c9d9/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:38:48,694 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a9b3ef-cb31-4861-a032-19dfcb83c9d9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:38:48,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a9b3ef-cb31-4861-a032-19dfcb83c9d9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-20 07:38:48,994 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 07:38:48,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:38:48,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 62 conjunts are in the unsatisfiable core [2021-11-20 07:38:49,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:38:49,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-20 07:38:49,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-11-20 07:38:49,220 INFO L354 Elim1Store]: treesize reduction 152, result has 20.4 percent of original size [2021-11-20 07:38:49,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 79 treesize of output 99 [2021-11-20 07:38:49,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:38:49,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 23 [2021-11-20 07:38:49,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:38:49,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 26 [2021-11-20 07:38:49,679 INFO L354 Elim1Store]: treesize reduction 315, result has 18.4 percent of original size [2021-11-20 07:38:49,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 95 treesize of output 134 [2021-11-20 07:38:49,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:38:49,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:38:49,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:38:49,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 28 [2021-11-20 07:38:49,971 INFO L354 Elim1Store]: treesize reduction 268, result has 18.0 percent of original size [2021-11-20 07:38:49,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 79 treesize of output 115 [2021-11-20 07:38:50,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:38:50,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:38:50,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:38:50,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:38:50,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:38:50,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:38:50,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 36 [2021-11-20 07:39:00,343 INFO L354 Elim1Store]: treesize reduction 516, result has 12.5 percent of original size [2021-11-20 07:39:00,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 14 case distinctions, treesize of input 112 treesize of output 152 [2021-11-20 07:39:00,415 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 07:39:00,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:39:00,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:39:00,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:39:00,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:39:00,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:39:00,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:39:00,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:39:00,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:39:00,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:39:00,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:39:00,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 25 [2021-11-20 07:39:18,490 INFO L354 Elim1Store]: treesize reduction 283, result has 1.0 percent of original size [2021-11-20 07:39:18,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 123 treesize of output 48 [2021-11-20 07:39:18,669 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 8 proven. 50 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 07:39:18,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:39:31,324 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:39:31,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565349990] [2021-11-20 07:39:31,324 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:39:31,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086107419] [2021-11-20 07:39:31,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086107419] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:39:31,324 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:39:31,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2021-11-20 07:39:31,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641337138] [2021-11-20 07:39:31,325 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 07:39:31,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-20 07:39:31,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:39:31,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-20 07:39:31,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=1653, Unknown=9, NotChecked=0, Total=1892 [2021-11-20 07:39:31,327 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand has 30 states, 29 states have (on average 1.6206896551724137) internal successors, (47), 27 states have internal predecessors, (47), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:39:32,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:39:32,654 INFO L93 Difference]: Finished difference Result 105 states and 125 transitions. [2021-11-20 07:39:32,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-20 07:39:32,655 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.6206896551724137) internal successors, (47), 27 states have internal predecessors, (47), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 56 [2021-11-20 07:39:32,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:39:32,656 INFO L225 Difference]: With dead ends: 105 [2021-11-20 07:39:32,657 INFO L226 Difference]: Without dead ends: 101 [2021-11-20 07:39:32,658 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 855 ImplicationChecksByTransitivity, 38.0s TimeCoverageRelationStatistics Valid=287, Invalid=2056, Unknown=9, NotChecked=0, Total=2352 [2021-11-20 07:39:32,659 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 28 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 834 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 529 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 07:39:32,659 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 370 Invalid, 834 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 293 Invalid, 0 Unknown, 529 Unchecked, 0.6s Time] [2021-11-20 07:39:32,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-11-20 07:39:32,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 88. [2021-11-20 07:39:32,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 79 states have (on average 1.1898734177215189) internal successors, (94), 79 states have internal predecessors, (94), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-20 07:39:32,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 104 transitions. [2021-11-20 07:39:32,676 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 104 transitions. Word has length 56 [2021-11-20 07:39:32,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:39:32,677 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 104 transitions. [2021-11-20 07:39:32,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 1.6206896551724137) internal successors, (47), 27 states have internal predecessors, (47), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:39:32,677 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 104 transitions. [2021-11-20 07:39:32,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-20 07:39:32,678 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:39:32,678 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:39:32,715 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a9b3ef-cb31-4861-a032-19dfcb83c9d9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-20 07:39:32,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a9b3ef-cb31-4861-a032-19dfcb83c9d9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:39:32,904 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:39:32,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:39:32,904 INFO L85 PathProgramCache]: Analyzing trace with hash 214145686, now seen corresponding path program 4 times [2021-11-20 07:39:32,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:39:32,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137134102] [2021-11-20 07:39:32,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:39:32,905 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:39:32,919 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:39:32,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1090566673] [2021-11-20 07:39:32,922 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 07:39:32,922 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:39:32,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a9b3ef-cb31-4861-a032-19dfcb83c9d9/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:39:32,924 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a9b3ef-cb31-4861-a032-19dfcb83c9d9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:39:32,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a9b3ef-cb31-4861-a032-19dfcb83c9d9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-20 07:39:33,212 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 07:39:33,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:39:33,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-20 07:39:33,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:39:33,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-11-20 07:39:33,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-20 07:39:33,415 INFO L354 Elim1Store]: treesize reduction 128, result has 19.5 percent of original size [2021-11-20 07:39:33,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 75 treesize of output 91 [2021-11-20 07:39:33,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:39:33,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 7 [2021-11-20 07:39:33,776 INFO L354 Elim1Store]: treesize reduction 315, result has 18.4 percent of original size [2021-11-20 07:39:33,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 95 treesize of output 134 [2021-11-20 07:39:33,809 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 07:39:33,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:39:33,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:39:33,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:39:33,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 42 [2021-11-20 07:39:34,059 INFO L354 Elim1Store]: treesize reduction 472, result has 17.6 percent of original size [2021-11-20 07:39:34,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 106 treesize of output 163 [2021-11-20 07:39:34,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:39:34,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:39:34,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:39:34,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:39:34,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:39:34,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:39:34,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 57 [2021-11-20 07:39:45,490 INFO L354 Elim1Store]: treesize reduction 590, result has 23.8 percent of original size [2021-11-20 07:39:45,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 19 case distinctions, treesize of input 133 treesize of output 253 [2021-11-20 07:39:46,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:39:46,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:39:46,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:39:46,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:39:46,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:39:46,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:39:47,024 INFO L354 Elim1Store]: treesize reduction 127, result has 43.0 percent of original size [2021-11-20 07:39:47,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 137 treesize of output 169 [2021-11-20 07:39:48,836 INFO L354 Elim1Store]: treesize reduction 408, result has 0.7 percent of original size [2021-11-20 07:39:48,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 121 treesize of output 42 [2021-11-20 07:39:49,041 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 8 proven. 50 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 07:39:49,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:39:58,384 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:39:58,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 277 treesize of output 277 [2021-11-20 07:39:58,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 4 [2021-11-20 07:39:58,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 235 treesize of output 225 [2021-11-20 07:39:58,792 INFO L354 Elim1Store]: treesize reduction 102, result has 44.9 percent of original size [2021-11-20 07:39:58,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 194524 treesize of output 182817 [2021-11-20 07:40:12,012 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 07:40:12,012 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:40:12,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137134102] [2021-11-20 07:40:12,012 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:40:12,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090566673] [2021-11-20 07:40:12,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090566673] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:40:12,013 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:40:12,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 30] total 55 [2021-11-20 07:40:12,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404867414] [2021-11-20 07:40:12,014 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:40:12,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-11-20 07:40:12,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:40:12,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-11-20 07:40:12,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=639, Invalid=2328, Unknown=3, NotChecked=0, Total=2970 [2021-11-20 07:40:12,018 INFO L87 Difference]: Start difference. First operand 88 states and 104 transitions. Second operand has 55 states, 55 states have (on average 1.6) internal successors, (88), 55 states have internal predecessors, (88), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-20 07:40:20,950 WARN L227 SmtUtils]: Spent 7.13s on a formula simplification. DAG size of input: 126 DAG size of output: 124 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 07:41:00,352 WARN L227 SmtUtils]: Spent 12.62s on a formula simplification. DAG size of input: 171 DAG size of output: 162 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 07:41:10,957 WARN L227 SmtUtils]: Spent 6.82s on a formula simplification. DAG size of input: 164 DAG size of output: 162 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 07:41:33,651 WARN L227 SmtUtils]: Spent 17.11s on a formula simplification. DAG size of input: 185 DAG size of output: 176 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 07:41:38,617 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-20 07:42:24,199 WARN L227 SmtUtils]: Spent 10.58s on a formula simplification. DAG size of input: 162 DAG size of output: 161 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 07:42:34,438 WARN L227 SmtUtils]: Spent 9.11s on a formula simplification. DAG size of input: 166 DAG size of output: 164 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 07:42:51,760 WARN L227 SmtUtils]: Spent 14.75s on a formula simplification. DAG size of input: 162 DAG size of output: 161 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 07:43:01,246 WARN L227 SmtUtils]: Spent 7.67s on a formula simplification. DAG size of input: 115 DAG size of output: 114 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 07:44:02,589 WARN L227 SmtUtils]: Spent 57.59s on a formula simplification. DAG size of input: 206 DAG size of output: 199 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 07:44:23,928 WARN L227 SmtUtils]: Spent 17.66s on a formula simplification. DAG size of input: 158 DAG size of output: 151 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 07:44:59,422 WARN L227 SmtUtils]: Spent 30.97s on a formula simplification. DAG size of input: 186 DAG size of output: 179 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 07:45:29,758 WARN L227 SmtUtils]: Spent 11.22s on a formula simplification. DAG size of input: 153 DAG size of output: 152 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 07:45:43,194 WARN L227 SmtUtils]: Spent 5.63s on a formula simplification that was a NOOP. DAG size: 139 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 07:46:21,264 WARN L227 SmtUtils]: Spent 31.54s on a formula simplification. DAG size of input: 185 DAG size of output: 177 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 07:46:55,917 WARN L227 SmtUtils]: Spent 28.47s on a formula simplification. DAG size of input: 161 DAG size of output: 154 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 07:47:20,563 WARN L227 SmtUtils]: Spent 22.36s on a formula simplification. DAG size of input: 132 DAG size of output: 125 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 07:47:24,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:47:24,045 INFO L93 Difference]: Finished difference Result 220 states and 276 transitions. [2021-11-20 07:47:24,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-11-20 07:47:24,047 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.6) internal successors, (88), 55 states have internal predecessors, (88), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 56 [2021-11-20 07:47:24,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:47:24,049 INFO L225 Difference]: With dead ends: 220 [2021-11-20 07:47:24,049 INFO L226 Difference]: Without dead ends: 214 [2021-11-20 07:47:24,056 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 48 SyntacticMatches, 9 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6386 ImplicationChecksByTransitivity, 416.8s TimeCoverageRelationStatistics Valid=3533, Invalid=13756, Unknown=3, NotChecked=0, Total=17292 [2021-11-20 07:47:24,057 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 439 mSDsluCounter, 485 mSDsCounter, 0 mSdLazyCounter, 1944 mSolverCounterSat, 673 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 441 SdHoareTripleChecker+Valid, 516 SdHoareTripleChecker+Invalid, 2740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 673 IncrementalHoareTripleChecker+Valid, 1944 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 123 IncrementalHoareTripleChecker+Unchecked, 34.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:47:24,058 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [441 Valid, 516 Invalid, 2740 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [673 Valid, 1944 Invalid, 0 Unknown, 123 Unchecked, 34.1s Time] [2021-11-20 07:47:24,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-11-20 07:47:24,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 144. [2021-11-20 07:47:24,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 130 states have (on average 1.2307692307692308) internal successors, (160), 130 states have internal predecessors, (160), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-20 07:47:24,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 178 transitions. [2021-11-20 07:47:24,105 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 178 transitions. Word has length 56 [2021-11-20 07:47:24,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:47:24,105 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 178 transitions. [2021-11-20 07:47:24,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.6) internal successors, (88), 55 states have internal predecessors, (88), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-20 07:47:24,105 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 178 transitions. [2021-11-20 07:47:24,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-20 07:47:24,106 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:47:24,106 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:47:24,129 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a9b3ef-cb31-4861-a032-19dfcb83c9d9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-20 07:47:24,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a9b3ef-cb31-4861-a032-19dfcb83c9d9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:47:24,307 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:47:24,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:47:24,307 INFO L85 PathProgramCache]: Analyzing trace with hash -70154694, now seen corresponding path program 5 times [2021-11-20 07:47:24,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:47:24,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575584860] [2021-11-20 07:47:24,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:47:24,308 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:47:24,316 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:47:24,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [48340275] [2021-11-20 07:47:24,317 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 07:47:24,317 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:47:24,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a9b3ef-cb31-4861-a032-19dfcb83c9d9/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:47:24,320 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a9b3ef-cb31-4861-a032-19dfcb83c9d9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:47:24,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a9b3ef-cb31-4861-a032-19dfcb83c9d9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-20 07:47:24,540 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-11-20 07:47:24,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:47:24,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 07:47:24,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:47:24,738 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 40 proven. 17 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-20 07:47:24,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:47:24,939 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 19 proven. 30 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-20 07:47:24,939 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:47:24,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575584860] [2021-11-20 07:47:24,939 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:47:24,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48340275] [2021-11-20 07:47:24,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48340275] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:47:24,940 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:47:24,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-11-20 07:47:24,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644822361] [2021-11-20 07:47:24,941 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:47:24,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-20 07:47:24,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:47:24,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-20 07:47:24,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-11-20 07:47:24,943 INFO L87 Difference]: Start difference. First operand 144 states and 178 transitions. Second operand has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 states have internal predecessors, (50), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 07:47:25,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:47:25,283 INFO L93 Difference]: Finished difference Result 312 states and 386 transitions. [2021-11-20 07:47:25,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 07:47:25,285 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 states have internal predecessors, (50), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 58 [2021-11-20 07:47:25,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:47:25,287 INFO L225 Difference]: With dead ends: 312 [2021-11-20 07:47:25,287 INFO L226 Difference]: Without dead ends: 205 [2021-11-20 07:47:25,288 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-11-20 07:47:25,289 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 141 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:47:25,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 95 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 07:47:25,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-11-20 07:47:25,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 159. [2021-11-20 07:47:25,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 142 states have (on average 1.1690140845070423) internal successors, (166), 142 states have internal predecessors, (166), 11 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-11-20 07:47:25,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 188 transitions. [2021-11-20 07:47:25,328 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 188 transitions. Word has length 58 [2021-11-20 07:47:25,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:47:25,328 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 188 transitions. [2021-11-20 07:47:25,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 states have internal predecessors, (50), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 07:47:25,329 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 188 transitions. [2021-11-20 07:47:25,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-20 07:47:25,330 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:47:25,330 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:47:25,355 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a9b3ef-cb31-4861-a032-19dfcb83c9d9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-20 07:47:25,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a9b3ef-cb31-4861-a032-19dfcb83c9d9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-20 07:47:25,540 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:47:25,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:47:25,540 INFO L85 PathProgramCache]: Analyzing trace with hash -2106200234, now seen corresponding path program 6 times [2021-11-20 07:47:25,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:47:25,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576324868] [2021-11-20 07:47:25,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:47:25,541 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:47:25,548 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:47:25,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1800388984] [2021-11-20 07:47:25,549 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-20 07:47:25,549 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:47:25,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a9b3ef-cb31-4861-a032-19dfcb83c9d9/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:47:25,550 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a9b3ef-cb31-4861-a032-19dfcb83c9d9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:47:25,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a9b3ef-cb31-4861-a032-19dfcb83c9d9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-20 07:47:25,746 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-11-20 07:47:25,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:47:25,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 07:47:25,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:47:25,958 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 14 proven. 35 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-20 07:47:25,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:47:26,165 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 6 proven. 35 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-20 07:47:26,166 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:47:26,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576324868] [2021-11-20 07:47:26,166 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:47:26,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800388984] [2021-11-20 07:47:26,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800388984] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:47:26,166 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:47:26,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-11-20 07:47:26,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699802410] [2021-11-20 07:47:26,167 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:47:26,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-20 07:47:26,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:47:26,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-20 07:47:26,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-11-20 07:47:26,169 INFO L87 Difference]: Start difference. First operand 159 states and 188 transitions. Second operand has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 12 states have internal predecessors, (52), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 07:47:26,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:47:26,819 INFO L93 Difference]: Finished difference Result 239 states and 276 transitions. [2021-11-20 07:47:26,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-20 07:47:26,821 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 12 states have internal predecessors, (52), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 58 [2021-11-20 07:47:26,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:47:26,824 INFO L225 Difference]: With dead ends: 239 [2021-11-20 07:47:26,824 INFO L226 Difference]: Without dead ends: 235 [2021-11-20 07:47:26,825 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=238, Invalid=518, Unknown=0, NotChecked=0, Total=756 [2021-11-20 07:47:26,826 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 53 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 07:47:26,826 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 177 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 07:47:26,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-11-20 07:47:26,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 172. [2021-11-20 07:47:26,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 154 states have (on average 1.1688311688311688) internal successors, (180), 154 states have internal predecessors, (180), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-11-20 07:47:26,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 202 transitions. [2021-11-20 07:47:26,875 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 202 transitions. Word has length 58 [2021-11-20 07:47:26,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:47:26,875 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 202 transitions. [2021-11-20 07:47:26,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 12 states have internal predecessors, (52), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 07:47:26,876 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 202 transitions. [2021-11-20 07:47:26,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-20 07:47:26,877 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:47:26,877 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:47:26,906 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a9b3ef-cb31-4861-a032-19dfcb83c9d9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-20 07:47:27,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a9b3ef-cb31-4861-a032-19dfcb83c9d9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-20 07:47:27,082 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:47:27,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:47:27,082 INFO L85 PathProgramCache]: Analyzing trace with hash 1538493247, now seen corresponding path program 7 times [2021-11-20 07:47:27,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:47:27,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218779338] [2021-11-20 07:47:27,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:47:27,083 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:47:27,089 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:47:27,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [288887398] [2021-11-20 07:47:27,089 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-20 07:47:27,090 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:47:27,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a9b3ef-cb31-4861-a032-19dfcb83c9d9/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:47:27,101 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a9b3ef-cb31-4861-a032-19dfcb83c9d9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:47:27,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a9b3ef-cb31-4861-a032-19dfcb83c9d9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-20 07:47:27,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:47:27,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 07:47:27,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:47:27,425 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 58 proven. 17 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-20 07:47:27,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:47:27,699 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 50 proven. 17 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-20 07:47:27,699 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:47:27,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218779338] [2021-11-20 07:47:27,700 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:47:27,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288887398] [2021-11-20 07:47:27,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288887398] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:47:27,700 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:47:27,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-11-20 07:47:27,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050215026] [2021-11-20 07:47:27,700 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:47:27,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-20 07:47:27,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:47:27,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-20 07:47:27,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-11-20 07:47:27,702 INFO L87 Difference]: Start difference. First operand 172 states and 202 transitions. Second operand has 12 states, 12 states have (on average 4.75) internal successors, (57), 12 states have internal predecessors, (57), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 07:47:28,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:47:28,143 INFO L93 Difference]: Finished difference Result 235 states and 264 transitions. [2021-11-20 07:47:28,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-20 07:47:28,144 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 12 states have internal predecessors, (57), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 63 [2021-11-20 07:47:28,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:47:28,146 INFO L225 Difference]: With dead ends: 235 [2021-11-20 07:47:28,146 INFO L226 Difference]: Without dead ends: 161 [2021-11-20 07:47:28,147 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=151, Invalid=355, Unknown=0, NotChecked=0, Total=506 [2021-11-20 07:47:28,147 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 106 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:47:28,148 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 111 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 07:47:28,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-11-20 07:47:28,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 148. [2021-11-20 07:47:28,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 133 states have (on average 1.150375939849624) internal successors, (153), 133 states have internal predecessors, (153), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-20 07:47:28,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 171 transitions. [2021-11-20 07:47:28,181 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 171 transitions. Word has length 63 [2021-11-20 07:47:28,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:47:28,181 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 171 transitions. [2021-11-20 07:47:28,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 12 states have internal predecessors, (57), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 07:47:28,182 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 171 transitions. [2021-11-20 07:47:28,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-20 07:47:28,183 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:47:28,183 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:47:28,209 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a9b3ef-cb31-4861-a032-19dfcb83c9d9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-20 07:47:28,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a9b3ef-cb31-4861-a032-19dfcb83c9d9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-20 07:47:28,391 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:47:28,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:47:28,391 INFO L85 PathProgramCache]: Analyzing trace with hash -259604962, now seen corresponding path program 8 times [2021-11-20 07:47:28,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:47:28,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915259531] [2021-11-20 07:47:28,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:47:28,391 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:47:28,397 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:47:28,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2062204530] [2021-11-20 07:47:28,398 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 07:47:28,398 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:47:28,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a9b3ef-cb31-4861-a032-19dfcb83c9d9/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:47:28,400 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a9b3ef-cb31-4861-a032-19dfcb83c9d9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:47:28,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a9b3ef-cb31-4861-a032-19dfcb83c9d9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-20 07:47:28,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 07:47:28,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:47:28,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 07:47:28,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:47:28,659 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 43 proven. 17 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-20 07:47:28,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:47:28,952 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 33 proven. 19 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-20 07:47:28,953 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:47:28,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915259531] [2021-11-20 07:47:28,953 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:47:28,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062204530] [2021-11-20 07:47:28,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062204530] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:47:28,954 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:47:28,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-11-20 07:47:28,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326703479] [2021-11-20 07:47:28,954 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:47:28,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-20 07:47:28,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:47:28,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-20 07:47:28,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-11-20 07:47:28,955 INFO L87 Difference]: Start difference. First operand 148 states and 171 transitions. Second operand has 15 states, 15 states have (on average 3.6) internal successors, (54), 15 states have internal predecessors, (54), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 07:47:29,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:47:29,525 INFO L93 Difference]: Finished difference Result 212 states and 239 transitions. [2021-11-20 07:47:29,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-20 07:47:29,526 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 15 states have internal predecessors, (54), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 63 [2021-11-20 07:47:29,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:47:29,528 INFO L225 Difference]: With dead ends: 212 [2021-11-20 07:47:29,528 INFO L226 Difference]: Without dead ends: 149 [2021-11-20 07:47:29,529 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=169, Invalid=383, Unknown=0, NotChecked=0, Total=552 [2021-11-20 07:47:29,530 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 159 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:47:29,530 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 100 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 07:47:29,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-11-20 07:47:29,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 127. [2021-11-20 07:47:29,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 112 states have (on average 1.1517857142857142) internal successors, (129), 112 states have internal predecessors, (129), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-20 07:47:29,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 147 transitions. [2021-11-20 07:47:29,557 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 147 transitions. Word has length 63 [2021-11-20 07:47:29,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:47:29,558 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 147 transitions. [2021-11-20 07:47:29,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 15 states have internal predecessors, (54), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 07:47:29,559 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 147 transitions. [2021-11-20 07:47:29,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-20 07:47:29,560 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:47:29,560 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:47:29,597 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a9b3ef-cb31-4861-a032-19dfcb83c9d9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-20 07:47:29,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a9b3ef-cb31-4861-a032-19dfcb83c9d9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:47:29,786 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:47:29,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:47:29,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1335153970, now seen corresponding path program 1 times [2021-11-20 07:47:29,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:47:29,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047393209] [2021-11-20 07:47:29,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:47:29,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:47:29,796 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:47:29,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2075113792] [2021-11-20 07:47:29,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:47:29,796 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:47:29,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a9b3ef-cb31-4861-a032-19dfcb83c9d9/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:47:29,798 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a9b3ef-cb31-4861-a032-19dfcb83c9d9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:47:29,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a9b3ef-cb31-4861-a032-19dfcb83c9d9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-20 07:47:30,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:47:30,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 70 conjunts are in the unsatisfiable core [2021-11-20 07:47:30,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:47:30,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-11-20 07:47:30,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-20 07:47:30,563 INFO L354 Elim1Store]: treesize reduction 152, result has 20.4 percent of original size [2021-11-20 07:47:30,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 79 treesize of output 99 [2021-11-20 07:47:30,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:47:30,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 26 [2021-11-20 07:47:31,081 INFO L354 Elim1Store]: treesize reduction 315, result has 18.4 percent of original size [2021-11-20 07:47:31,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 95 treesize of output 134 [2021-11-20 07:47:31,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:47:31,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:47:31,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:47:31,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 39 [2021-11-20 07:47:31,451 INFO L354 Elim1Store]: treesize reduction 330, result has 16.9 percent of original size [2021-11-20 07:47:31,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 88 treesize of output 128 [2021-11-20 07:47:31,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:47:31,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:47:31,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:47:31,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:47:31,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:47:31,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:47:31,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 37 [2021-11-20 07:47:48,513 INFO L354 Elim1Store]: treesize reduction 516, result has 12.5 percent of original size [2021-11-20 07:47:48,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 14 case distinctions, treesize of input 112 treesize of output 152 [2021-11-20 07:47:48,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:47:48,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:47:48,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:47:48,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:47:48,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:47:48,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:47:48,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:47:48,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:47:48,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:47:48,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:47:48,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 38 [2021-11-20 07:48:26,559 INFO L354 Elim1Store]: treesize reduction 336, result has 15.4 percent of original size [2021-11-20 07:48:26,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 102 treesize of output 139 [2021-11-20 07:48:26,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:48:26,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:48:26,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:48:26,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:48:26,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:48:26,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:48:26,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 46 [2021-11-20 07:48:49,455 INFO L354 Elim1Store]: treesize reduction 283, result has 1.0 percent of original size [2021-11-20 07:48:49,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 116 treesize of output 51 [2021-11-20 07:48:49,719 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 16 proven. 64 refuted. 8 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 07:48:49,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:49:07,558 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:49:07,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047393209] [2021-11-20 07:49:07,558 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:49:07,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075113792] [2021-11-20 07:49:07,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075113792] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:49:07,559 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:49:07,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2021-11-20 07:49:07,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688940220] [2021-11-20 07:49:07,559 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 07:49:07,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-20 07:49:07,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:49:07,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-20 07:49:07,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=345, Invalid=2495, Unknown=22, NotChecked=0, Total=2862 [2021-11-20 07:49:07,562 INFO L87 Difference]: Start difference. First operand 127 states and 147 transitions. Second operand has 40 states, 38 states have (on average 1.4210526315789473) internal successors, (54), 34 states have internal predecessors, (54), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-20 07:49:14,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:49:14,964 INFO L93 Difference]: Finished difference Result 192 states and 217 transitions. [2021-11-20 07:49:14,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-20 07:49:14,965 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 38 states have (on average 1.4210526315789473) internal successors, (54), 34 states have internal predecessors, (54), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 70 [2021-11-20 07:49:14,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:49:14,967 INFO L225 Difference]: With dead ends: 192 [2021-11-20 07:49:14,967 INFO L226 Difference]: Without dead ends: 172 [2021-11-20 07:49:14,969 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 36 SyntacticMatches, 6 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1645 ImplicationChecksByTransitivity, 94.3s TimeCoverageRelationStatistics Valid=454, Invalid=3182, Unknown=24, NotChecked=0, Total=3660 [2021-11-20 07:49:14,970 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 88 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 537 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-20 07:49:14,970 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 284 Invalid, 923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 349 Invalid, 0 Unknown, 537 Unchecked, 0.7s Time] [2021-11-20 07:49:14,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-11-20 07:49:15,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 137. [2021-11-20 07:49:15,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 119 states have (on average 1.1512605042016806) internal successors, (137), 119 states have internal predecessors, (137), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-11-20 07:49:15,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 159 transitions. [2021-11-20 07:49:15,015 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 159 transitions. Word has length 70 [2021-11-20 07:49:15,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:49:15,015 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 159 transitions. [2021-11-20 07:49:15,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 38 states have (on average 1.4210526315789473) internal successors, (54), 34 states have internal predecessors, (54), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-20 07:49:15,016 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 159 transitions. [2021-11-20 07:49:15,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-20 07:49:15,017 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:49:15,017 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:49:15,040 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a9b3ef-cb31-4861-a032-19dfcb83c9d9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-20 07:49:15,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a9b3ef-cb31-4861-a032-19dfcb83c9d9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:49:15,217 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:49:15,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:49:15,218 INFO L85 PathProgramCache]: Analyzing trace with hash 1554008688, now seen corresponding path program 1 times [2021-11-20 07:49:15,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:49:15,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626106249] [2021-11-20 07:49:15,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:49:15,218 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:49:15,226 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:49:15,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1243174373] [2021-11-20 07:49:15,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:49:15,226 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:49:15,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a9b3ef-cb31-4861-a032-19dfcb83c9d9/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:49:15,227 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a9b3ef-cb31-4861-a032-19dfcb83c9d9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:49:15,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a9b3ef-cb31-4861-a032-19dfcb83c9d9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-20 07:49:16,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:49:16,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 61 conjunts are in the unsatisfiable core [2021-11-20 07:49:16,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:49:16,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-11-20 07:49:16,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-20 07:49:16,959 INFO L354 Elim1Store]: treesize reduction 128, result has 19.5 percent of original size [2021-11-20 07:49:16,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 75 treesize of output 91 [2021-11-20 07:49:16,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:49:16,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 7 [2021-11-20 07:49:17,330 INFO L354 Elim1Store]: treesize reduction 182, result has 15.3 percent of original size [2021-11-20 07:49:17,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 76 treesize of output 96 [2021-11-20 07:49:17,370 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 07:49:17,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:49:17,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:49:17,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:49:17,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 23 [2021-11-20 07:49:17,678 INFO L354 Elim1Store]: treesize reduction 268, result has 18.0 percent of original size [2021-11-20 07:49:17,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 79 treesize of output 115 [2021-11-20 07:49:17,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:49:17,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:49:17,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:49:17,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:49:17,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:49:17,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:49:17,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 36 [2021-11-20 07:49:33,157 INFO L354 Elim1Store]: treesize reduction 516, result has 12.5 percent of original size [2021-11-20 07:49:33,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 14 case distinctions, treesize of input 112 treesize of output 152 [2021-11-20 07:49:33,296 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 07:49:33,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:49:33,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:49:33,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:49:33,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:49:33,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:49:33,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:49:33,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:49:33,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:49:33,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:49:33,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:49:33,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 43 [2021-11-20 07:49:49,614 INFO L354 Elim1Store]: treesize reduction 635, result has 23.9 percent of original size [2021-11-20 07:49:49,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 19 case distinctions, treesize of input 147 treesize of output 277 [2021-11-20 07:49:50,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:49:50,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:49:50,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:49:50,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:49:50,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:49:50,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:49:50,948 INFO L354 Elim1Store]: treesize reduction 132, result has 43.3 percent of original size [2021-11-20 07:49:50,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 209 treesize of output 224 [2021-11-20 07:50:15,803 INFO L354 Elim1Store]: treesize reduction 283, result has 1.0 percent of original size [2021-11-20 07:50:15,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 116 treesize of output 51 [2021-11-20 07:50:16,047 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 16 proven. 67 refuted. 4 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 07:50:16,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:50:31,062 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:50:31,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626106249] [2021-11-20 07:50:31,062 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:50:31,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243174373] [2021-11-20 07:50:31,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243174373] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:50:31,063 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:50:31,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2021-11-20 07:50:31,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202324816] [2021-11-20 07:50:31,063 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 07:50:31,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-20 07:50:31,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:50:31,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-20 07:50:31,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=1895, Unknown=12, NotChecked=0, Total=2162 [2021-11-20 07:50:31,065 INFO L87 Difference]: Start difference. First operand 137 states and 159 transitions. Second operand has 33 states, 32 states have (on average 1.6875) internal successors, (54), 30 states have internal predecessors, (54), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-11-20 07:50:32,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:50:32,234 INFO L93 Difference]: Finished difference Result 169 states and 193 transitions. [2021-11-20 07:50:32,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-20 07:50:32,235 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 1.6875) internal successors, (54), 30 states have internal predecessors, (54), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 70 [2021-11-20 07:50:32,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:50:32,237 INFO L225 Difference]: With dead ends: 169 [2021-11-20 07:50:32,237 INFO L226 Difference]: Without dead ends: 149 [2021-11-20 07:50:32,238 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 52 SyntacticMatches, 9 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1135 ImplicationChecksByTransitivity, 62.0s TimeCoverageRelationStatistics Valid=275, Invalid=2065, Unknown=12, NotChecked=0, Total=2352 [2021-11-20 07:50:32,239 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 24 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 380 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 07:50:32,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 338 Invalid, 552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 168 Invalid, 0 Unknown, 380 Unchecked, 0.4s Time] [2021-11-20 07:50:32,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-11-20 07:50:32,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 137. [2021-11-20 07:50:32,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 119 states have (on average 1.1512605042016806) internal successors, (137), 119 states have internal predecessors, (137), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-11-20 07:50:32,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 159 transitions. [2021-11-20 07:50:32,275 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 159 transitions. Word has length 70 [2021-11-20 07:50:32,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:50:32,275 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 159 transitions. [2021-11-20 07:50:32,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 1.6875) internal successors, (54), 30 states have internal predecessors, (54), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-11-20 07:50:32,276 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 159 transitions. [2021-11-20 07:50:32,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-20 07:50:32,277 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:50:32,277 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:50:32,300 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a9b3ef-cb31-4861-a032-19dfcb83c9d9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-20 07:50:32,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a9b3ef-cb31-4861-a032-19dfcb83c9d9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-20 07:50:32,478 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:50:32,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:50:32,478 INFO L85 PathProgramCache]: Analyzing trace with hash 940787184, now seen corresponding path program 2 times [2021-11-20 07:50:32,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:50:32,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445156152] [2021-11-20 07:50:32,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:50:32,479 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:50:32,485 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:50:32,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [246593298] [2021-11-20 07:50:32,486 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 07:50:32,486 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:50:32,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a9b3ef-cb31-4861-a032-19dfcb83c9d9/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:50:32,490 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a9b3ef-cb31-4861-a032-19dfcb83c9d9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:50:32,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0a9b3ef-cb31-4861-a032-19dfcb83c9d9/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-20 07:50:32,947 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 07:50:32,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:50:32,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 55 conjunts are in the unsatisfiable core [2021-11-20 07:50:32,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:50:33,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-20 07:50:33,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-11-20 07:50:33,142 INFO L354 Elim1Store]: treesize reduction 140, result has 20.0 percent of original size [2021-11-20 07:50:33,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 77 treesize of output 95 [2021-11-20 07:50:33,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:50:33,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 21 [2021-11-20 07:50:33,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:50:33,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 24 [2021-11-20 07:50:33,620 INFO L354 Elim1Store]: treesize reduction 182, result has 15.3 percent of original size [2021-11-20 07:50:33,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 76 treesize of output 96 [2021-11-20 07:50:33,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:50:33,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:50:33,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:50:33,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 16 [2021-11-20 07:50:33,911 INFO L354 Elim1Store]: treesize reduction 268, result has 18.0 percent of original size [2021-11-20 07:50:33,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 79 treesize of output 115 [2021-11-20 07:50:33,939 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 07:50:34,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:50:34,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:50:34,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:50:34,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:50:34,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:50:34,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:50:34,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 33 [2021-11-20 07:50:52,132 INFO L354 Elim1Store]: treesize reduction 590, result has 23.8 percent of original size [2021-11-20 07:50:52,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 19 case distinctions, treesize of input 133 treesize of output 253 [2021-11-20 07:50:53,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:50:53,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:50:53,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:50:53,162 INFO L354 Elim1Store]: treesize reduction 280, result has 0.4 percent of original size [2021-11-20 07:50:53,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 158 treesize of output 49 [2021-11-20 07:51:11,900 INFO L354 Elim1Store]: treesize reduction 485, result has 17.8 percent of original size [2021-11-20 07:51:11,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 14 case distinctions, treesize of input 112 treesize of output 183 [2021-11-20 07:51:12,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:51:12,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:51:12,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:51:12,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:51:12,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:51:12,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:51:12,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:51:12,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:51:12,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:51:12,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:51:12,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 35 [2021-11-20 07:51:12,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:51:12,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:51:13,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:51:13,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:51:13,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:51:13,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:51:13,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:51:13,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:51:13,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:51:13,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:51:13,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 22 [2021-11-20 07:51:51,062 INFO L354 Elim1Store]: treesize reduction 264, result has 7.7 percent of original size [2021-11-20 07:51:51,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 197 treesize of output 105 [2021-11-20 07:51:52,336 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 26 proven. 52 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-20 07:51:52,336 INFO L328 TraceCheckSpWp]: Computing backward predicates...