./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-patterns/array28_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_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/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_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-patterns/array28_pattern.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/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_f883eb3f-fe86-433e-9347-ef7d0d581c2a/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 8b49bb3ea989868d96c18ff859c95dc74ebb805f64994c11617c2c5b61c8e87f --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 06:40:27,264 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 06:40:27,268 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 06:40:27,327 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 06:40:27,328 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 06:40:27,334 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 06:40:27,337 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 06:40:27,342 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 06:40:27,345 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 06:40:27,354 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 06:40:27,355 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 06:40:27,357 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 06:40:27,357 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 06:40:27,359 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 06:40:27,360 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 06:40:27,362 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 06:40:27,364 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 06:40:27,371 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 06:40:27,374 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 06:40:27,382 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 06:40:27,390 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 06:40:27,392 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 06:40:27,398 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 06:40:27,399 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 06:40:27,404 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 06:40:27,404 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 06:40:27,405 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 06:40:27,407 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 06:40:27,407 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 06:40:27,409 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 06:40:27,410 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 06:40:27,411 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 06:40:27,413 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 06:40:27,415 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 06:40:27,416 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 06:40:27,417 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 06:40:27,417 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 06:40:27,418 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 06:40:27,418 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 06:40:27,419 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 06:40:27,420 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 06:40:27,421 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-20 06:40:27,469 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 06:40:27,469 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 06:40:27,470 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 06:40:27,470 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 06:40:27,471 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 06:40:27,471 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 06:40:27,478 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 06:40:27,478 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 06:40:27,479 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 06:40:27,479 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 06:40:27,480 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 06:40:27,481 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 06:40:27,481 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 06:40:27,481 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 06:40:27,481 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 06:40:27,482 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 06:40:27,482 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 06:40:27,482 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 06:40:27,482 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 06:40:27,483 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 06:40:27,483 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 06:40:27,483 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 06:40:27,483 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 06:40:27,484 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 06:40:27,484 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:40:27,485 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 06:40:27,485 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 06:40:27,485 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 06:40:27,485 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 06:40:27,488 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 06:40:27,488 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 06:40:27,488 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 06:40:27,489 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 06:40:27,489 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 06:40:27,489 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_f883eb3f-fe86-433e-9347-ef7d0d581c2a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8b49bb3ea989868d96c18ff859c95dc74ebb805f64994c11617c2c5b61c8e87f [2021-11-20 06:40:27,806 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 06:40:27,842 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 06:40:27,845 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 06:40:27,847 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 06:40:27,848 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 06:40:27,850 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/array-patterns/array28_pattern.c [2021-11-20 06:40:27,926 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/data/326926327/6e3df05ea2194c749058f76f45331731/FLAGb0bd6addc [2021-11-20 06:40:28,499 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 06:40:28,501 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/sv-benchmarks/c/array-patterns/array28_pattern.c [2021-11-20 06:40:28,515 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/data/326926327/6e3df05ea2194c749058f76f45331731/FLAGb0bd6addc [2021-11-20 06:40:28,848 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/data/326926327/6e3df05ea2194c749058f76f45331731 [2021-11-20 06:40:28,854 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 06:40:28,855 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 06:40:28,857 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 06:40:28,857 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 06:40:28,860 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 06:40:28,860 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:40:28" (1/1) ... [2021-11-20 06:40:28,862 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6332658e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:40:28, skipping insertion in model container [2021-11-20 06:40:28,862 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:40:28" (1/1) ... [2021-11-20 06:40:28,873 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 06:40:28,892 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 06:40:29,105 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_f883eb3f-fe86-433e-9347-ef7d0d581c2a/sv-benchmarks/c/array-patterns/array28_pattern.c[1246,1259] [2021-11-20 06:40:29,128 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:40:29,144 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 06:40:29,166 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_f883eb3f-fe86-433e-9347-ef7d0d581c2a/sv-benchmarks/c/array-patterns/array28_pattern.c[1246,1259] [2021-11-20 06:40:29,176 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:40:29,192 INFO L208 MainTranslator]: Completed translation [2021-11-20 06:40:29,193 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:40:29 WrapperNode [2021-11-20 06:40:29,193 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 06:40:29,195 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 06:40:29,195 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 06:40:29,195 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 06:40:29,204 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:40:29" (1/1) ... [2021-11-20 06:40:29,213 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:40:29" (1/1) ... [2021-11-20 06:40:29,240 INFO L137 Inliner]: procedures = 16, calls = 16, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 75 [2021-11-20 06:40:29,243 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 06:40:29,244 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 06:40:29,244 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 06:40:29,244 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 06:40:29,254 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:40:29" (1/1) ... [2021-11-20 06:40:29,254 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:40:29" (1/1) ... [2021-11-20 06:40:29,260 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:40:29" (1/1) ... [2021-11-20 06:40:29,261 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:40:29" (1/1) ... [2021-11-20 06:40:29,280 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:40:29" (1/1) ... [2021-11-20 06:40:29,291 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:40:29" (1/1) ... [2021-11-20 06:40:29,298 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:40:29" (1/1) ... [2021-11-20 06:40:29,307 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 06:40:29,308 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 06:40:29,309 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 06:40:29,309 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 06:40:29,310 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:40:29" (1/1) ... [2021-11-20 06:40:29,320 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:40:29,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:40:29,354 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 06:40:29,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 06:40:29,405 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 06:40:29,405 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 06:40:29,406 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 06:40:29,406 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 06:40:29,406 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 06:40:29,406 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 06:40:29,406 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 06:40:29,406 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 06:40:29,480 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 06:40:29,482 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 06:40:29,692 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 06:40:29,699 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 06:40:29,700 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-20 06:40:29,702 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:40:29 BoogieIcfgContainer [2021-11-20 06:40:29,702 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 06:40:29,720 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 06:40:29,720 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 06:40:29,724 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 06:40:29,725 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 06:40:28" (1/3) ... [2021-11-20 06:40:29,725 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36bf27e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:40:29, skipping insertion in model container [2021-11-20 06:40:29,726 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:40:29" (2/3) ... [2021-11-20 06:40:29,726 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36bf27e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:40:29, skipping insertion in model container [2021-11-20 06:40:29,726 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:40:29" (3/3) ... [2021-11-20 06:40:29,728 INFO L111 eAbstractionObserver]: Analyzing ICFG array28_pattern.c [2021-11-20 06:40:29,734 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 06:40:29,734 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 06:40:29,843 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 06:40:29,852 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 06:40:29,852 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 06:40:29,888 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 21 states have (on average 1.619047619047619) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:40:29,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-20 06:40:29,895 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:40:29,896 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:40:29,896 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:40:29,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:40:29,903 INFO L85 PathProgramCache]: Analyzing trace with hash -320975489, now seen corresponding path program 1 times [2021-11-20 06:40:29,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:40:29,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527067927] [2021-11-20 06:40:29,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:40:29,917 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:40:30,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:30,150 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 06:40:30,151 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:40:30,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527067927] [2021-11-20 06:40:30,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527067927] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:40:30,153 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:40:30,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 06:40:30,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225737233] [2021-11-20 06:40:30,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:40:30,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-20 06:40:30,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:40:30,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-20 06:40:30,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 06:40:30,242 INFO L87 Difference]: Start difference. First operand has 23 states, 21 states have (on average 1.619047619047619) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:40:30,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:40:30,265 INFO L93 Difference]: Finished difference Result 43 states and 64 transitions. [2021-11-20 06:40:30,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 06:40:30,268 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-20 06:40:30,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:40:30,278 INFO L225 Difference]: With dead ends: 43 [2021-11-20 06:40:30,278 INFO L226 Difference]: Without dead ends: 19 [2021-11-20 06:40:30,282 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 06:40:30,288 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:40:30,290 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:40:30,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-11-20 06:40:30,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-11-20 06:40:30,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:40:30,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2021-11-20 06:40:30,339 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 10 [2021-11-20 06:40:30,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:40:30,340 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2021-11-20 06:40:30,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:40:30,341 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2021-11-20 06:40:30,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-20 06:40:30,342 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:40:30,342 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:40:30,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 06:40:30,344 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:40:30,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:40:30,350 INFO L85 PathProgramCache]: Analyzing trace with hash -1931938343, now seen corresponding path program 1 times [2021-11-20 06:40:30,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:40:30,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622015198] [2021-11-20 06:40:30,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:40:30,352 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:40:30,381 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:40:30,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1620558468] [2021-11-20 06:40:30,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:40:30,383 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:40:30,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:40:30,385 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:40:30,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 06:40:30,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:30,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 06:40:30,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:40:30,619 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 06:40:30,619 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:40:30,620 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:40:30,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622015198] [2021-11-20 06:40:30,621 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:40:30,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620558468] [2021-11-20 06:40:30,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620558468] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:40:30,627 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:40:30,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:40:30,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345542102] [2021-11-20 06:40:30,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:40:30,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:40:30,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:40:30,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:40:30,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:40:30,633 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:40:30,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:40:30,676 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2021-11-20 06:40:30,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:40:30,677 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-20 06:40:30,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:40:30,681 INFO L225 Difference]: With dead ends: 26 [2021-11-20 06:40:30,684 INFO L226 Difference]: Without dead ends: 22 [2021-11-20 06:40:30,685 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 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 06:40:30,687 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 13 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:40:30,689 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 52 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:40:30,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-11-20 06:40:30,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-11-20 06:40:30,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:40:30,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2021-11-20 06:40:30,704 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 10 [2021-11-20 06:40:30,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:40:30,713 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2021-11-20 06:40:30,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:40:30,714 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2021-11-20 06:40:30,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-20 06:40:30,715 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:40:30,715 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:40:30,754 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 06:40:30,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:40:30,942 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:40:30,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:40:30,943 INFO L85 PathProgramCache]: Analyzing trace with hash -94215630, now seen corresponding path program 1 times [2021-11-20 06:40:30,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:40:30,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513070750] [2021-11-20 06:40:30,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:40:30,944 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:40:30,966 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:40:30,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [840606075] [2021-11-20 06:40:30,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:40:30,966 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:40:30,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:40:30,975 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:40:30,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 06:40:31,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:31,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 06:40:31,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:40:31,176 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:40:31,176 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:40:31,177 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:40:31,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513070750] [2021-11-20 06:40:31,177 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:40:31,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840606075] [2021-11-20 06:40:31,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840606075] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:40:31,178 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:40:31,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 06:40:31,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574623098] [2021-11-20 06:40:31,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:40:31,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:40:31,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:40:31,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:40:31,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:40:31,181 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:40:31,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:40:31,268 INFO L93 Difference]: Finished difference Result 47 states and 61 transitions. [2021-11-20 06:40:31,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 06:40:31,268 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-20 06:40:31,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:40:31,270 INFO L225 Difference]: With dead ends: 47 [2021-11-20 06:40:31,270 INFO L226 Difference]: Without dead ends: 34 [2021-11-20 06:40:31,271 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:40:31,272 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 14 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:40:31,273 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 31 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:40:31,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-11-20 06:40:31,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 23. [2021-11-20 06:40:31,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:40:31,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2021-11-20 06:40:31,279 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 15 [2021-11-20 06:40:31,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:40:31,280 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2021-11-20 06:40:31,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:40:31,280 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2021-11-20 06:40:31,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-20 06:40:31,281 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:40:31,281 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:40:31,329 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-20 06:40:31,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:40:31,497 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:40:31,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:40:31,497 INFO L85 PathProgramCache]: Analyzing trace with hash -169454663, now seen corresponding path program 1 times [2021-11-20 06:40:31,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:40:31,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749628969] [2021-11-20 06:40:31,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:40:31,498 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:40:31,518 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:40:31,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1436352873] [2021-11-20 06:40:31,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:40:31,523 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:40:31,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:40:31,526 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:40:31,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 06:40:31,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:31,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 06:40:31,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:40:31,659 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 06:40:31,659 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:40:31,660 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:40:31,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749628969] [2021-11-20 06:40:31,660 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:40:31,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436352873] [2021-11-20 06:40:31,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436352873] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:40:31,661 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:40:31,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:40:31,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587700724] [2021-11-20 06:40:31,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:40:31,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:40:31,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:40:31,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:40:31,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:40:31,664 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:40:31,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:40:31,754 INFO L93 Difference]: Finished difference Result 46 states and 62 transitions. [2021-11-20 06:40:31,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:40:31,755 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-20 06:40:31,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:40:31,757 INFO L225 Difference]: With dead ends: 46 [2021-11-20 06:40:31,757 INFO L226 Difference]: Without dead ends: 28 [2021-11-20 06:40:31,758 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 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 06:40:31,762 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 27 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:40:31,764 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 17 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:40:31,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-11-20 06:40:31,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2021-11-20 06:40:31,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 24 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:40:31,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2021-11-20 06:40:31,777 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 18 [2021-11-20 06:40:31,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:40:31,778 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2021-11-20 06:40:31,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:40:31,779 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2021-11-20 06:40:31,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-20 06:40:31,788 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:40:31,788 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:40:31,831 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 06:40:32,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:40:32,004 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:40:32,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:40:32,005 INFO L85 PathProgramCache]: Analyzing trace with hash -308201553, now seen corresponding path program 1 times [2021-11-20 06:40:32,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:40:32,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047243698] [2021-11-20 06:40:32,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:40:32,006 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:40:32,030 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:40:32,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1977228892] [2021-11-20 06:40:32,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:40:32,030 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:40:32,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:40:32,040 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:40:32,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 06:40:32,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:32,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 06:40:32,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:40:32,224 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 06:40:32,224 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:40:32,224 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:40:32,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047243698] [2021-11-20 06:40:32,224 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:40:32,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977228892] [2021-11-20 06:40:32,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977228892] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:40:32,225 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:40:32,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:40:32,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171334596] [2021-11-20 06:40:32,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:40:32,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:40:32,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:40:32,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:40:32,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:40:32,228 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:40:32,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:40:32,305 INFO L93 Difference]: Finished difference Result 57 states and 74 transitions. [2021-11-20 06:40:32,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:40:32,305 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-20 06:40:32,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:40:32,308 INFO L225 Difference]: With dead ends: 57 [2021-11-20 06:40:32,308 INFO L226 Difference]: Without dead ends: 37 [2021-11-20 06:40:32,309 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:40:32,310 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 14 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:40:32,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 21 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:40:32,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-11-20 06:40:32,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 32. [2021-11-20 06:40:32,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 31 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:40:32,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2021-11-20 06:40:32,331 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 21 [2021-11-20 06:40:32,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:40:32,331 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2021-11-20 06:40:32,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:40:32,331 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2021-11-20 06:40:32,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-20 06:40:32,334 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:40:32,334 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:40:32,369 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 06:40:32,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:40:32,556 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:40:32,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:40:32,557 INFO L85 PathProgramCache]: Analyzing trace with hash 1924412114, now seen corresponding path program 1 times [2021-11-20 06:40:32,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:40:32,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384323545] [2021-11-20 06:40:32,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:40:32,558 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:40:32,568 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:40:32,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [388291841] [2021-11-20 06:40:32,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:40:32,569 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:40:32,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:40:32,570 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:40:32,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 06:40:32,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:32,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-20 06:40:32,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:40:32,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 06:40:32,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 06:40:32,902 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 35 treesize of output 23 [2021-11-20 06:40:32,947 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:40:32,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:40:33,198 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 06:40:33,198 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 71 treesize of output 71 [2021-11-20 06:40:33,239 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 06:40:33,298 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 47 treesize of output 30 [2021-11-20 06:40:33,432 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 06:40:33,433 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 65 treesize of output 101 [2021-11-20 06:40:41,343 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:40:41,343 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:40:41,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384323545] [2021-11-20 06:40:41,344 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:40:41,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388291841] [2021-11-20 06:40:41,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388291841] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:40:41,345 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:40:41,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-11-20 06:40:41,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959579715] [2021-11-20 06:40:41,346 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:40:41,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-20 06:40:41,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:40:41,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-20 06:40:41,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-11-20 06:40:41,348 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:40:42,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:40:42,273 INFO L93 Difference]: Finished difference Result 58 states and 72 transitions. [2021-11-20 06:40:42,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 06:40:42,285 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-20 06:40:42,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:40:42,286 INFO L225 Difference]: With dead ends: 58 [2021-11-20 06:40:42,286 INFO L226 Difference]: Without dead ends: 54 [2021-11-20 06:40:42,287 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-11-20 06:40:42,288 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 54 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-20 06:40:42,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 68 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-20 06:40:42,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-11-20 06:40:42,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 47. [2021-11-20 06:40:42,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.326086956521739) internal successors, (61), 46 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:40:42,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 61 transitions. [2021-11-20 06:40:42,305 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 61 transitions. Word has length 22 [2021-11-20 06:40:42,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:40:42,305 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 61 transitions. [2021-11-20 06:40:42,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:40:42,306 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 61 transitions. [2021-11-20 06:40:42,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-20 06:40:42,308 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:40:42,308 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:40:42,358 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-20 06:40:42,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:40:42,523 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:40:42,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:40:42,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1610605580, now seen corresponding path program 2 times [2021-11-20 06:40:42,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:40:42,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933658429] [2021-11-20 06:40:42,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:40:42,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:40:42,533 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:40:42,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1934132875] [2021-11-20 06:40:42,534 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:40:42,534 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:40:42,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:40:42,537 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:40:42,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 06:40:42,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:40:42,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:40:42,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 06:40:42,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:40:42,734 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:40:42,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:40:42,816 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:40:42,816 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:40:42,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933658429] [2021-11-20 06:40:42,816 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:40:42,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934132875] [2021-11-20 06:40:42,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934132875] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:40:42,817 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:40:42,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-11-20 06:40:42,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753479625] [2021-11-20 06:40:42,818 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:40:42,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 06:40:42,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:40:42,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 06:40:42,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:40:42,820 INFO L87 Difference]: Start difference. First operand 47 states and 61 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:40:43,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:40:43,017 INFO L93 Difference]: Finished difference Result 145 states and 190 transitions. [2021-11-20 06:40:43,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 06:40:43,018 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-20 06:40:43,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:40:43,023 INFO L225 Difference]: With dead ends: 145 [2021-11-20 06:40:43,023 INFO L226 Difference]: Without dead ends: 110 [2021-11-20 06:40:43,024 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 39 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 06:40:43,026 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 93 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:40:43,026 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 48 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:40:43,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-11-20 06:40:43,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 81. [2021-11-20 06:40:43,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.3) internal successors, (104), 80 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:40:43,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 104 transitions. [2021-11-20 06:40:43,054 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 104 transitions. Word has length 24 [2021-11-20 06:40:43,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:40:43,055 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 104 transitions. [2021-11-20 06:40:43,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:40:43,056 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 104 transitions. [2021-11-20 06:40:43,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-20 06:40:43,063 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:40:43,063 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:40:43,108 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-11-20 06:40:43,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:40:43,285 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:40:43,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:40:43,285 INFO L85 PathProgramCache]: Analyzing trace with hash -1861003047, now seen corresponding path program 3 times [2021-11-20 06:40:43,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:40:43,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818557823] [2021-11-20 06:40:43,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:40:43,285 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:40:43,296 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:40:43,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1352301024] [2021-11-20 06:40:43,297 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 06:40:43,297 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:40:43,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:40:43,298 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:40:43,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-20 06:40:43,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-20 06:40:43,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:40:43,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 06:40:43,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:40:43,498 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-20 06:40:43,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:40:43,606 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-20 06:40:43,606 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:40:43,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818557823] [2021-11-20 06:40:43,606 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:40:43,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352301024] [2021-11-20 06:40:43,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352301024] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:40:43,607 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:40:43,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-11-20 06:40:43,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550861775] [2021-11-20 06:40:43,608 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:40:43,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 06:40:43,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:40:43,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 06:40:43,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:40:43,609 INFO L87 Difference]: Start difference. First operand 81 states and 104 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:40:43,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:40:43,769 INFO L93 Difference]: Finished difference Result 174 states and 219 transitions. [2021-11-20 06:40:43,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 06:40:43,770 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-20 06:40:43,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:40:43,772 INFO L225 Difference]: With dead ends: 174 [2021-11-20 06:40:43,772 INFO L226 Difference]: Without dead ends: 151 [2021-11-20 06:40:43,772 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 45 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 06:40:43,773 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 65 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:40:43,774 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 56 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:40:43,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-11-20 06:40:43,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 94. [2021-11-20 06:40:43,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.2795698924731183) internal successors, (119), 93 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:40:43,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 119 transitions. [2021-11-20 06:40:43,790 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 119 transitions. Word has length 27 [2021-11-20 06:40:43,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:40:43,790 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 119 transitions. [2021-11-20 06:40:43,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:40:43,791 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 119 transitions. [2021-11-20 06:40:43,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-20 06:40:43,792 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:40:43,792 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:40:43,836 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-20 06:40:44,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:40:44,020 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:40:44,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:40:44,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1161564239, now seen corresponding path program 1 times [2021-11-20 06:40:44,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:40:44,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748792378] [2021-11-20 06:40:44,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:40:44,021 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:40:44,029 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:40:44,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [141017353] [2021-11-20 06:40:44,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:40:44,029 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:40:44,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:40:44,031 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:40:44,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-20 06:40:44,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:44,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 06:40:44,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:40:44,221 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-20 06:40:44,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:40:44,336 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-20 06:40:44,336 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:40:44,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748792378] [2021-11-20 06:40:44,336 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:40:44,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141017353] [2021-11-20 06:40:44,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141017353] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:40:44,337 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:40:44,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-11-20 06:40:44,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375885493] [2021-11-20 06:40:44,337 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:40:44,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-20 06:40:44,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:40:44,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-20 06:40:44,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-11-20 06:40:44,339 INFO L87 Difference]: Start difference. First operand 94 states and 119 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:40:44,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:40:44,595 INFO L93 Difference]: Finished difference Result 185 states and 239 transitions. [2021-11-20 06:40:44,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-20 06:40:44,597 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-11-20 06:40:44,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:40:44,598 INFO L225 Difference]: With dead ends: 185 [2021-11-20 06:40:44,598 INFO L226 Difference]: Without dead ends: 107 [2021-11-20 06:40:44,599 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2021-11-20 06:40:44,600 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 87 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:40:44,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 34 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:40:44,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-11-20 06:40:44,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 80. [2021-11-20 06:40:44,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.240506329113924) internal successors, (98), 79 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:40:44,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 98 transitions. [2021-11-20 06:40:44,610 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 98 transitions. Word has length 28 [2021-11-20 06:40:44,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:40:44,611 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 98 transitions. [2021-11-20 06:40:44,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:40:44,611 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 98 transitions. [2021-11-20 06:40:44,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-20 06:40:44,618 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:40:44,619 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:40:44,649 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-20 06:40:44,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:40:44,837 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:40:44,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:40:44,837 INFO L85 PathProgramCache]: Analyzing trace with hash -1512912821, now seen corresponding path program 1 times [2021-11-20 06:40:44,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:40:44,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716427100] [2021-11-20 06:40:44,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:40:44,837 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:40:44,845 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:40:44,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [576134581] [2021-11-20 06:40:44,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:40:44,845 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:40:44,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:40:44,852 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:40:44,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-20 06:40:44,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:44,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 06:40:44,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:40:45,032 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 06:40:45,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:40:45,135 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 06:40:45,135 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:40:45,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716427100] [2021-11-20 06:40:45,135 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:40:45,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576134581] [2021-11-20 06:40:45,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576134581] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:40:45,136 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:40:45,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-11-20 06:40:45,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50750370] [2021-11-20 06:40:45,137 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:40:45,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-20 06:40:45,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:40:45,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-20 06:40:45,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-11-20 06:40:45,139 INFO L87 Difference]: Start difference. First operand 80 states and 98 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:40:45,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:40:45,432 INFO L93 Difference]: Finished difference Result 173 states and 226 transitions. [2021-11-20 06:40:45,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-20 06:40:45,433 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-11-20 06:40:45,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:40:45,434 INFO L225 Difference]: With dead ends: 173 [2021-11-20 06:40:45,434 INFO L226 Difference]: Without dead ends: 103 [2021-11-20 06:40:45,435 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2021-11-20 06:40:45,436 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 62 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:40:45,437 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 32 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 06:40:45,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-11-20 06:40:45,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 75. [2021-11-20 06:40:45,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.2297297297297298) internal successors, (91), 74 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:40:45,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 91 transitions. [2021-11-20 06:40:45,447 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 91 transitions. Word has length 28 [2021-11-20 06:40:45,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:40:45,447 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 91 transitions. [2021-11-20 06:40:45,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:40:45,448 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 91 transitions. [2021-11-20 06:40:45,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-20 06:40:45,449 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:40:45,449 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:40:45,485 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-11-20 06:40:45,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-20 06:40:45,664 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:40:45,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:40:45,665 INFO L85 PathProgramCache]: Analyzing trace with hash -1901938394, now seen corresponding path program 1 times [2021-11-20 06:40:45,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:40:45,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554558559] [2021-11-20 06:40:45,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:40:45,665 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:40:45,673 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:40:45,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1307434330] [2021-11-20 06:40:45,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:40:45,673 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:40:45,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:40:45,677 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:40:45,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-20 06:40:45,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:40:45,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 06:40:45,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:40:45,847 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 06:40:45,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:40:45,949 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 06:40:45,949 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:40:45,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554558559] [2021-11-20 06:40:45,950 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:40:45,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307434330] [2021-11-20 06:40:45,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307434330] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:40:45,950 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:40:45,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-11-20 06:40:45,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212187111] [2021-11-20 06:40:45,951 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:40:45,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 06:40:45,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:40:45,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 06:40:45,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:40:45,952 INFO L87 Difference]: Start difference. First operand 75 states and 91 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:40:46,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:40:46,097 INFO L93 Difference]: Finished difference Result 89 states and 106 transitions. [2021-11-20 06:40:46,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 06:40:46,098 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-11-20 06:40:46,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:40:46,099 INFO L225 Difference]: With dead ends: 89 [2021-11-20 06:40:46,099 INFO L226 Difference]: Without dead ends: 76 [2021-11-20 06:40:46,099 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-11-20 06:40:46,100 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 55 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:40:46,101 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 37 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:40:46,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-11-20 06:40:46,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 52. [2021-11-20 06:40:46,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.2156862745098038) internal successors, (62), 51 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:40:46,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 62 transitions. [2021-11-20 06:40:46,107 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 62 transitions. Word has length 32 [2021-11-20 06:40:46,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:40:46,108 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 62 transitions. [2021-11-20 06:40:46,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:40:46,108 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 62 transitions. [2021-11-20 06:40:46,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-20 06:40:46,109 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:40:46,109 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:40:46,138 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-20 06:40:46,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:40:46,326 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:40:46,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:40:46,327 INFO L85 PathProgramCache]: Analyzing trace with hash -533293431, now seen corresponding path program 2 times [2021-11-20 06:40:46,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:40:46,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554376492] [2021-11-20 06:40:46,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:40:46,327 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:40:46,334 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:40:46,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1196515964] [2021-11-20 06:40:46,335 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:40:46,335 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:40:46,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:40:46,336 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:40:46,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-20 06:40:46,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:40:46,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:40:46,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 06:40:46,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:40:46,513 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 13 proven. 13 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-20 06:40:46,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:40:46,611 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 13 proven. 13 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-20 06:40:46,611 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:40:46,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554376492] [2021-11-20 06:40:46,612 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:40:46,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196515964] [2021-11-20 06:40:46,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196515964] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:40:46,613 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:40:46,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-11-20 06:40:46,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930731585] [2021-11-20 06:40:46,614 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:40:46,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 06:40:46,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:40:46,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 06:40:46,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:40:46,616 INFO L87 Difference]: Start difference. First operand 52 states and 62 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:40:46,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:40:46,778 INFO L93 Difference]: Finished difference Result 140 states and 168 transitions. [2021-11-20 06:40:46,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 06:40:46,779 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-20 06:40:46,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:40:46,780 INFO L225 Difference]: With dead ends: 140 [2021-11-20 06:40:46,780 INFO L226 Difference]: Without dead ends: 95 [2021-11-20 06:40:46,781 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-11-20 06:40:46,781 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 44 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:40:46,782 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 39 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:40:46,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-11-20 06:40:46,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 66. [2021-11-20 06:40:46,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.2) internal successors, (78), 65 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:40:46,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 78 transitions. [2021-11-20 06:40:46,793 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 78 transitions. Word has length 44 [2021-11-20 06:40:46,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:40:46,793 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 78 transitions. [2021-11-20 06:40:46,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:40:46,794 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 78 transitions. [2021-11-20 06:40:46,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-20 06:40:46,796 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:40:46,796 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:40:46,831 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-20 06:40:47,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-20 06:40:47,012 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:40:47,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:40:47,013 INFO L85 PathProgramCache]: Analyzing trace with hash -436388146, now seen corresponding path program 3 times [2021-11-20 06:40:47,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:40:47,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456446127] [2021-11-20 06:40:47,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:40:47,013 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:40:47,025 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:40:47,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [560341551] [2021-11-20 06:40:47,025 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 06:40:47,025 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:40:47,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:40:47,027 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:40:47,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-20 06:40:47,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-20 06:40:47,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:40:47,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 06:40:47,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:40:47,206 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-20 06:40:47,207 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:40:47,207 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:40:47,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456446127] [2021-11-20 06:40:47,208 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:40:47,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560341551] [2021-11-20 06:40:47,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560341551] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:40:47,209 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:40:47,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 06:40:47,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498730181] [2021-11-20 06:40:47,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:40:47,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:40:47,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:40:47,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:40:47,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:40:47,212 INFO L87 Difference]: Start difference. First operand 66 states and 78 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:40:47,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:40:47,302 INFO L93 Difference]: Finished difference Result 90 states and 104 transitions. [2021-11-20 06:40:47,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 06:40:47,303 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-11-20 06:40:47,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:40:47,304 INFO L225 Difference]: With dead ends: 90 [2021-11-20 06:40:47,304 INFO L226 Difference]: Without dead ends: 70 [2021-11-20 06:40:47,305 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:40:47,305 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 14 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:40:47,306 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 25 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:40:47,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-11-20 06:40:47,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 62. [2021-11-20 06:40:47,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.180327868852459) internal successors, (72), 61 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:40:47,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2021-11-20 06:40:47,321 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 45 [2021-11-20 06:40:47,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:40:47,321 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2021-11-20 06:40:47,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:40:47,322 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2021-11-20 06:40:47,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-20 06:40:47,323 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:40:47,323 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:40:47,370 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-20 06:40:47,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-20 06:40:47,549 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:40:47,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:40:47,550 INFO L85 PathProgramCache]: Analyzing trace with hash -570401652, now seen corresponding path program 4 times [2021-11-20 06:40:47,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:40:47,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074697899] [2021-11-20 06:40:47,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:40:47,550 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:40:47,558 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:40:47,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1468639091] [2021-11-20 06:40:47,558 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 06:40:47,559 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:40:47,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:40:47,560 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:40:47,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-20 06:40:47,717 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 06:40:47,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:40:47,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-20 06:40:47,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:40:47,847 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 06:40:47,859 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 06:40:48,085 INFO L354 Elim1Store]: treesize reduction 164, result has 19.2 percent of original size [2021-11-20 06:40:48,086 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 91 treesize of output 111 [2021-11-20 06:40:48,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:40:48,137 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 81 treesize of output 32 [2021-11-20 06:40:48,547 INFO L354 Elim1Store]: treesize reduction 323, result has 18.0 percent of original size [2021-11-20 06:40:48,547 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 101 treesize of output 140 [2021-11-20 06:40:48,569 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 06:40:48,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:40:48,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:40:48,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:40:48,619 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 93 treesize of output 32 [2021-11-20 06:40:48,963 INFO L354 Elim1Store]: treesize reduction 268, result has 18.0 percent of original size [2021-11-20 06:40:48,963 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 81 treesize of output 117 [2021-11-20 06:40:48,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:40:48,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:40:48,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:40:48,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:40:48,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:40:48,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:40:48,993 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 65 treesize of output 30 [2021-11-20 06:40:50,430 INFO L354 Elim1Store]: treesize reduction 168, result has 0.6 percent of original size [2021-11-20 06:40:50,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 131 treesize of output 46 [2021-11-20 06:40:50,512 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:40:50,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:41:13,274 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 06:41:13,275 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 570 treesize of output 570 [2021-11-20 06:41:13,713 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 06:41:14,301 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 06:41:14,453 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 528 treesize of output 510 [2021-11-20 06:41:15,560 INFO L354 Elim1Store]: treesize reduction 342, result has 16.4 percent of original size [2021-11-20 06:41:15,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 14957635 treesize of output 14007416 [2021-11-20 06:41:57,693 WARN L227 SmtUtils]: Spent 42.12s on a formula simplification that was a NOOP. DAG size: 3629 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-20 06:42:37,496 WARN L227 SmtUtils]: Spent 39.79s on a formula simplification that was a NOOP. DAG size: 3626 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-20 06:42:37,663 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:42:37,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074697899] [2021-11-20 06:42:37,663 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:42:37,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468639091] [2021-11-20 06:42:37,664 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-20 06:42:37,664 INFO L186 FreeRefinementEngine]: Found 0 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:42:37,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-11-20 06:42:37,664 ERROR L172 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2021-11-20 06:42:37,665 INFO L628 BasicCegarLoop]: Counterexample might be feasible [2021-11-20 06:42:37,671 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-20 06:42:37,711 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-20 06:42:37,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-20 06:42:37,896 INFO L732 BasicCegarLoop]: Path program histogram: [4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:42:37,899 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-20 06:42:37,928 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 06:42:37 BoogieIcfgContainer [2021-11-20 06:42:37,928 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-20 06:42:37,929 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-20 06:42:37,929 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-20 06:42:37,929 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-20 06:42:37,930 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:40:29" (3/4) ... [2021-11-20 06:42:37,933 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-20 06:42:37,933 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-20 06:42:37,939 INFO L158 Benchmark]: Toolchain (without parser) took 129078.53ms. Allocated memory was 94.4MB in the beginning and 211.8MB in the end (delta: 117.4MB). Free memory was 58.6MB in the beginning and 135.9MB in the end (delta: -77.3MB). Peak memory consumption was 41.1MB. Max. memory is 16.1GB. [2021-11-20 06:42:37,940 INFO L158 Benchmark]: CDTParser took 0.34ms. Allocated memory is still 94.4MB. Free memory is still 74.6MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 06:42:37,941 INFO L158 Benchmark]: CACSL2BoogieTranslator took 337.00ms. Allocated memory is still 94.4MB. Free memory was 58.4MB in the beginning and 67.6MB in the end (delta: -9.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-20 06:42:37,942 INFO L158 Benchmark]: Boogie Procedure Inliner took 48.26ms. Allocated memory is still 94.4MB. Free memory was 67.6MB in the beginning and 65.7MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-20 06:42:37,942 INFO L158 Benchmark]: Boogie Preprocessor took 63.74ms. Allocated memory is still 94.4MB. Free memory was 65.7MB in the beginning and 64.5MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-20 06:42:37,943 INFO L158 Benchmark]: RCFGBuilder took 393.64ms. Allocated memory is still 94.4MB. Free memory was 64.5MB in the beginning and 54.3MB in the end (delta: 10.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-20 06:42:37,943 INFO L158 Benchmark]: TraceAbstraction took 128208.09ms. Allocated memory was 94.4MB in the beginning and 211.8MB in the end (delta: 117.4MB). Free memory was 53.8MB in the beginning and 135.9MB in the end (delta: -82.1MB). Peak memory consumption was 115.0MB. Max. memory is 16.1GB. [2021-11-20 06:42:37,943 INFO L158 Benchmark]: Witness Printer took 4.35ms. Allocated memory is still 211.8MB. Free memory is still 135.9MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 06:42:37,946 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34ms. Allocated memory is still 94.4MB. Free memory is still 74.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 337.00ms. Allocated memory is still 94.4MB. Free memory was 58.4MB in the beginning and 67.6MB in the end (delta: -9.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 48.26ms. Allocated memory is still 94.4MB. Free memory was 67.6MB in the beginning and 65.7MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 63.74ms. Allocated memory is still 94.4MB. Free memory was 65.7MB in the beginning and 64.5MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 393.64ms. Allocated memory is still 94.4MB. Free memory was 64.5MB in the beginning and 54.3MB in the end (delta: 10.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 128208.09ms. Allocated memory was 94.4MB in the beginning and 211.8MB in the end (delta: 117.4MB). Free memory was 53.8MB in the beginning and 135.9MB in the end (delta: -82.1MB). Peak memory consumption was 115.0MB. Max. memory is 16.1GB. * Witness Printer took 4.35ms. Allocated memory is still 211.8MB. Free memory is still 135.9MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 31]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L35] signed long long ARR_SIZE ; [L39] ARR_SIZE = (signed long long)__VERIFIER_nondet_short() [L40] CALL assume_abort_if_not(ARR_SIZE > 0) [L29] COND FALSE !(!cond) [L40] RET assume_abort_if_not(ARR_SIZE > 0) [L42] int array[ARR_SIZE][ARR_SIZE] ; [L44] int row = 0, column = 0, num = -1 ; [L45] signed long long sum = 0; [L47] row=0 [L47] COND TRUE row column) [L54] COND FALSE !(row < column) [L59] array[row][column] = 0 [L48] column++ [L48] COND TRUE column column) [L54] COND TRUE row < column [L56] array[row][column] = num*(row+column) [L48] column++ [L48] COND FALSE !(column column [L52] array[row][column] = row+column [L48] column++ [L48] COND TRUE column column) [L54] COND FALSE !(row < column) [L59] array[row][column] = 0 [L48] column++ [L48] COND FALSE !(column main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/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 -> 8b49bb3ea989868d96c18ff859c95dc74ebb805f64994c11617c2c5b61c8e87f [2021-11-20 06:42:40,997 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 06:42:41,024 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 06:42:41,028 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 06:42:41,030 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 06:42:41,031 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 06:42:41,032 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/array-patterns/array28_pattern.c [2021-11-20 06:42:41,112 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/data/39cb6ed39/fee511a979a544be80a607bcbfbe9582/FLAG4a4d0d30a [2021-11-20 06:42:41,703 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 06:42:41,705 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/sv-benchmarks/c/array-patterns/array28_pattern.c [2021-11-20 06:42:41,716 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/data/39cb6ed39/fee511a979a544be80a607bcbfbe9582/FLAG4a4d0d30a [2021-11-20 06:42:42,047 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/data/39cb6ed39/fee511a979a544be80a607bcbfbe9582 [2021-11-20 06:42:42,050 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 06:42:42,051 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 06:42:42,053 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 06:42:42,053 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 06:42:42,057 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 06:42:42,058 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:42:42" (1/1) ... [2021-11-20 06:42:42,059 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10fb3654 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:42:42, skipping insertion in model container [2021-11-20 06:42:42,059 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:42:42" (1/1) ... [2021-11-20 06:42:42,068 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 06:42:42,087 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 06:42:42,229 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_f883eb3f-fe86-433e-9347-ef7d0d581c2a/sv-benchmarks/c/array-patterns/array28_pattern.c[1246,1259] [2021-11-20 06:42:42,250 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:42:42,260 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 06:42:42,273 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_f883eb3f-fe86-433e-9347-ef7d0d581c2a/sv-benchmarks/c/array-patterns/array28_pattern.c[1246,1259] [2021-11-20 06:42:42,283 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:42:42,315 INFO L208 MainTranslator]: Completed translation [2021-11-20 06:42:42,316 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:42:42 WrapperNode [2021-11-20 06:42:42,335 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 06:42:42,336 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 06:42:42,337 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 06:42:42,337 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 06:42:42,345 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:42:42" (1/1) ... [2021-11-20 06:42:42,367 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:42:42" (1/1) ... [2021-11-20 06:42:42,391 INFO L137 Inliner]: procedures = 18, calls = 16, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 74 [2021-11-20 06:42:42,393 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 06:42:42,394 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 06:42:42,394 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 06:42:42,395 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 06:42:42,404 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:42:42" (1/1) ... [2021-11-20 06:42:42,405 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:42:42" (1/1) ... [2021-11-20 06:42:42,412 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:42:42" (1/1) ... [2021-11-20 06:42:42,413 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:42:42" (1/1) ... [2021-11-20 06:42:42,432 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:42:42" (1/1) ... [2021-11-20 06:42:42,442 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:42:42" (1/1) ... [2021-11-20 06:42:42,449 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:42:42" (1/1) ... [2021-11-20 06:42:42,456 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 06:42:42,457 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 06:42:42,459 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 06:42:42,459 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 06:42:42,460 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:42:42" (1/1) ... [2021-11-20 06:42:42,471 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:42:42,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:42:42,502 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 06:42:42,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 06:42:42,559 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 06:42:42,559 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-20 06:42:42,559 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 06:42:42,559 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-20 06:42:42,560 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 06:42:42,560 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 06:42:42,560 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 06:42:42,560 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-20 06:42:42,648 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 06:42:42,650 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 06:42:43,044 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 06:42:43,051 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 06:42:43,051 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-20 06:42:43,053 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:42:43 BoogieIcfgContainer [2021-11-20 06:42:43,054 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 06:42:43,056 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 06:42:43,056 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 06:42:43,059 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 06:42:43,060 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 06:42:42" (1/3) ... [2021-11-20 06:42:43,061 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e7ebdc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:42:43, skipping insertion in model container [2021-11-20 06:42:43,061 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:42:42" (2/3) ... [2021-11-20 06:42:43,062 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e7ebdc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:42:43, skipping insertion in model container [2021-11-20 06:42:43,062 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:42:43" (3/3) ... [2021-11-20 06:42:43,064 INFO L111 eAbstractionObserver]: Analyzing ICFG array28_pattern.c [2021-11-20 06:42:43,070 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 06:42:43,071 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 06:42:43,122 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 06:42:43,130 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 06:42:43,130 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 06:42:43,144 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 21 states have (on average 1.619047619047619) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:42:43,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-20 06:42:43,150 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:42:43,151 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:42:43,151 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:42:43,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:42:43,157 INFO L85 PathProgramCache]: Analyzing trace with hash -320975489, now seen corresponding path program 1 times [2021-11-20 06:42:43,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:42:43,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1075456123] [2021-11-20 06:42:43,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:42:43,170 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:42:43,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:42:43,173 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:42:43,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-20 06:42:43,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:42:43,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-20 06:42:43,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:42:43,344 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 06:42:43,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:42:43,397 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 06:42:43,400 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:42:43,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1075456123] [2021-11-20 06:42:43,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1075456123] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 06:42:43,403 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:42:43,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-20 06:42:43,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873017690] [2021-11-20 06:42:43,406 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 06:42:43,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-20 06:42:43,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:42:43,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-20 06:42:43,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 06:42:43,471 INFO L87 Difference]: Start difference. First operand has 23 states, 21 states have (on average 1.619047619047619) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:42:43,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:42:43,492 INFO L93 Difference]: Finished difference Result 43 states and 64 transitions. [2021-11-20 06:42:43,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 06:42:43,495 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-20 06:42:43,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:42:43,504 INFO L225 Difference]: With dead ends: 43 [2021-11-20 06:42:43,504 INFO L226 Difference]: Without dead ends: 19 [2021-11-20 06:42:43,508 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 18 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 06:42:43,516 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:42:43,518 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:42:43,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-11-20 06:42:43,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-11-20 06:42:43,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:42:43,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2021-11-20 06:42:43,561 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 10 [2021-11-20 06:42:43,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:42:43,562 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2021-11-20 06:42:43,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:42:43,564 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2021-11-20 06:42:43,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-20 06:42:43,565 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:42:43,565 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:42:43,585 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-20 06:42:43,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:42:43,781 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:42:43,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:42:43,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1931938343, now seen corresponding path program 1 times [2021-11-20 06:42:43,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:42:43,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1647537245] [2021-11-20 06:42:43,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:42:43,789 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:42:43,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:42:43,791 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:42:43,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-20 06:42:43,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:42:43,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 06:42:43,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:42:43,956 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 06:42:43,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:42:44,026 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 06:42:44,026 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:42:44,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1647537245] [2021-11-20 06:42:44,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1647537245] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 06:42:44,027 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:42:44,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-20 06:42:44,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512305635] [2021-11-20 06:42:44,028 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 06:42:44,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:42:44,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:42:44,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:42:44,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:42:44,034 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:42:44,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:42:44,105 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2021-11-20 06:42:44,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:42:44,106 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-20 06:42:44,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:42:44,107 INFO L225 Difference]: With dead ends: 26 [2021-11-20 06:42:44,107 INFO L226 Difference]: Without dead ends: 22 [2021-11-20 06:42:44,107 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:42:44,109 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 13 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:42:44,110 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 73 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:42:44,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-11-20 06:42:44,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-11-20 06:42:44,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:42:44,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2021-11-20 06:42:44,117 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 10 [2021-11-20 06:42:44,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:42:44,118 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2021-11-20 06:42:44,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:42:44,119 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2021-11-20 06:42:44,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-20 06:42:44,119 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:42:44,120 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:42:44,135 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-20 06:42:44,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:42:44,332 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:42:44,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:42:44,333 INFO L85 PathProgramCache]: Analyzing trace with hash -94215630, now seen corresponding path program 1 times [2021-11-20 06:42:44,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:42:44,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1118462424] [2021-11-20 06:42:44,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:42:44,334 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:42:44,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:42:44,335 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:42:44,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-20 06:42:44,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:42:44,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 06:42:44,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:42:44,647 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 06:42:44,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:42:44,917 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 06:42:44,917 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:42:44,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1118462424] [2021-11-20 06:42:44,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1118462424] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 06:42:44,918 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:42:44,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-20 06:42:44,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124634289] [2021-11-20 06:42:44,919 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 06:42:44,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 06:42:44,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:42:44,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 06:42:44,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:42:44,922 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:42:45,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:42:45,164 INFO L93 Difference]: Finished difference Result 35 states and 44 transitions. [2021-11-20 06:42:45,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 06:42:45,167 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-20 06:42:45,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:42:45,168 INFO L225 Difference]: With dead ends: 35 [2021-11-20 06:42:45,168 INFO L226 Difference]: Without dead ends: 23 [2021-11-20 06:42:45,169 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:42:45,170 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 3 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:42:45,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 38 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 16 Unchecked, 0.2s Time] [2021-11-20 06:42:45,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-11-20 06:42:45,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-11-20 06:42:45,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:42:45,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2021-11-20 06:42:45,178 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 15 [2021-11-20 06:42:45,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:42:45,179 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2021-11-20 06:42:45,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:42:45,179 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2021-11-20 06:42:45,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-20 06:42:45,180 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:42:45,181 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:42:45,196 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-11-20 06:42:45,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:42:45,393 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:42:45,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:42:45,394 INFO L85 PathProgramCache]: Analyzing trace with hash -169454663, now seen corresponding path program 1 times [2021-11-20 06:42:45,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:42:45,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [830229734] [2021-11-20 06:42:45,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:42:45,395 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:42:45,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:42:45,398 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:42:45,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-20 06:42:45,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:42:45,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 06:42:45,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:42:45,793 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 06:42:45,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:42:45,976 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 06:42:45,977 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:42:45,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [830229734] [2021-11-20 06:42:45,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [830229734] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 06:42:45,978 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:42:45,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-20 06:42:45,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661286442] [2021-11-20 06:42:45,978 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 06:42:45,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 06:42:45,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:42:45,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 06:42:45,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:42:45,980 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:42:46,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:42:46,136 INFO L93 Difference]: Finished difference Result 42 states and 55 transitions. [2021-11-20 06:42:46,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 06:42:46,137 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-20 06:42:46,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:42:46,138 INFO L225 Difference]: With dead ends: 42 [2021-11-20 06:42:46,138 INFO L226 Difference]: Without dead ends: 24 [2021-11-20 06:42:46,138 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:42:46,140 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:42:46,140 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 47 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 29 Unchecked, 0.1s Time] [2021-11-20 06:42:46,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-20 06:42:46,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-11-20 06:42:46,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:42:46,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2021-11-20 06:42:46,147 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 18 [2021-11-20 06:42:46,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:42:46,147 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2021-11-20 06:42:46,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:42:46,148 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2021-11-20 06:42:46,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-20 06:42:46,149 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:42:46,149 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:42:46,167 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-20 06:42:46,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:42:46,368 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:42:46,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:42:46,369 INFO L85 PathProgramCache]: Analyzing trace with hash -308201553, now seen corresponding path program 1 times [2021-11-20 06:42:46,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:42:46,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [410151505] [2021-11-20 06:42:46,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:42:46,370 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:42:46,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:42:46,372 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:42:46,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-20 06:42:46,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:42:46,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 06:42:46,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:42:46,531 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 06:42:46,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:42:46,613 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 06:42:46,614 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:42:46,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [410151505] [2021-11-20 06:42:46,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [410151505] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 06:42:46,618 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:42:46,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-20 06:42:46,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451687708] [2021-11-20 06:42:46,619 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 06:42:46,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 06:42:46,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:42:46,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 06:42:46,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:42:46,623 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:42:47,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:42:47,089 INFO L93 Difference]: Finished difference Result 65 states and 87 transitions. [2021-11-20 06:42:47,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 06:42:47,093 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-20 06:42:47,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:42:47,094 INFO L225 Difference]: With dead ends: 65 [2021-11-20 06:42:47,094 INFO L226 Difference]: Without dead ends: 47 [2021-11-20 06:42:47,095 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:42:47,096 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 37 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:42:47,097 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 36 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 06:42:47,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-11-20 06:42:47,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 33. [2021-11-20 06:42:47,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.34375) internal successors, (43), 32 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:42:47,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2021-11-20 06:42:47,107 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 21 [2021-11-20 06:42:47,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:42:47,108 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2021-11-20 06:42:47,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:42:47,109 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2021-11-20 06:42:47,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-20 06:42:47,110 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:42:47,110 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:42:47,126 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-20 06:42:47,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:42:47,326 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:42:47,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:42:47,327 INFO L85 PathProgramCache]: Analyzing trace with hash 1924412114, now seen corresponding path program 1 times [2021-11-20 06:42:47,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:42:47,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [877795950] [2021-11-20 06:42:47,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:42:47,328 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:42:47,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:42:47,329 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:42:47,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-20 06:42:47,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:42:47,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-20 06:42:47,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:42:47,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 06:42:47,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2021-11-20 06:42:47,883 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:42:47,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:42:48,702 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 24 treesize of output 22 [2021-11-20 06:42:48,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 44 [2021-11-20 06:42:49,796 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:42:49,796 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:42:49,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [877795950] [2021-11-20 06:42:49,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [877795950] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:42:49,796 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:42:49,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-11-20 06:42:49,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875028298] [2021-11-20 06:42:49,797 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:42:49,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-20 06:42:49,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:42:49,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-20 06:42:49,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-11-20 06:42:49,799 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:42:53,267 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:42:55,326 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:42:57,385 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:42:57,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:42:57,902 INFO L93 Difference]: Finished difference Result 60 states and 79 transitions. [2021-11-20 06:42:57,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 06:42:57,903 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-20 06:42:57,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:42:57,905 INFO L225 Difference]: With dead ends: 60 [2021-11-20 06:42:57,905 INFO L226 Difference]: Without dead ends: 56 [2021-11-20 06:42:57,906 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-11-20 06:42:57,907 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 40 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 19 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:42:57,908 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 58 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 95 Invalid, 3 Unknown, 33 Unchecked, 7.4s Time] [2021-11-20 06:42:57,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-11-20 06:42:57,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 50. [2021-11-20 06:42:57,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.3877551020408163) internal successors, (68), 49 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:42:57,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 68 transitions. [2021-11-20 06:42:57,931 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 68 transitions. Word has length 22 [2021-11-20 06:42:57,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:42:57,932 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 68 transitions. [2021-11-20 06:42:57,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:42:57,933 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 68 transitions. [2021-11-20 06:42:57,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-20 06:42:57,934 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:42:57,935 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:42:57,956 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-20 06:42:58,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:42:58,149 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:42:58,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:42:58,150 INFO L85 PathProgramCache]: Analyzing trace with hash -1610605580, now seen corresponding path program 2 times [2021-11-20 06:42:58,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:42:58,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2131038958] [2021-11-20 06:42:58,151 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:42:58,151 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:42:58,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:42:58,152 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:42:58,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-20 06:42:58,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:42:58,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:42:58,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-20 06:42:58,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:42:58,923 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 06:42:58,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:42:59,251 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 06:42:59,252 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:42:59,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2131038958] [2021-11-20 06:42:59,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2131038958] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:42:59,252 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:42:59,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2021-11-20 06:42:59,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829722247] [2021-11-20 06:42:59,253 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:42:59,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-20 06:42:59,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:42:59,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-20 06:42:59,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-11-20 06:42:59,254 INFO L87 Difference]: Start difference. First operand 50 states and 68 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:42:59,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:42:59,473 INFO L93 Difference]: Finished difference Result 66 states and 89 transitions. [2021-11-20 06:42:59,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-20 06:42:59,474 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-20 06:42:59,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:42:59,475 INFO L225 Difference]: With dead ends: 66 [2021-11-20 06:42:59,476 INFO L226 Difference]: Without dead ends: 62 [2021-11-20 06:42:59,476 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-11-20 06:42:59,477 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:42:59,477 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 50 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 40 Unchecked, 0.2s Time] [2021-11-20 06:42:59,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-11-20 06:42:59,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 54. [2021-11-20 06:42:59,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.3962264150943395) internal successors, (74), 53 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:42:59,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 74 transitions. [2021-11-20 06:42:59,487 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 74 transitions. Word has length 24 [2021-11-20 06:42:59,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:42:59,487 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 74 transitions. [2021-11-20 06:42:59,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:42:59,488 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 74 transitions. [2021-11-20 06:42:59,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-20 06:42:59,489 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:42:59,489 INFO L514 BasicCegarLoop]: trace histogram [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 06:42:59,506 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-20 06:42:59,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:42:59,706 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:42:59,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:42:59,707 INFO L85 PathProgramCache]: Analyzing trace with hash 1547988283, now seen corresponding path program 3 times [2021-11-20 06:42:59,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:42:59,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [174260958] [2021-11-20 06:42:59,707 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 06:42:59,707 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:42:59,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:42:59,710 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:42:59,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-20 06:42:59,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-20 06:42:59,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:42:59,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-20 06:42:59,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:43:00,270 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 06:43:00,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:43:00,837 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 06:43:00,838 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:43:00,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [174260958] [2021-11-20 06:43:00,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [174260958] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:43:00,838 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:43:00,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-11-20 06:43:00,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735864209] [2021-11-20 06:43:00,839 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:43:00,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-20 06:43:00,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:43:00,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-20 06:43:00,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-11-20 06:43:00,841 INFO L87 Difference]: Start difference. First operand 54 states and 74 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:43:01,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:43:01,292 INFO L93 Difference]: Finished difference Result 84 states and 109 transitions. [2021-11-20 06:43:01,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-20 06:43:01,292 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-11-20 06:43:01,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:43:01,293 INFO L225 Difference]: With dead ends: 84 [2021-11-20 06:43:01,293 INFO L226 Difference]: Without dead ends: 64 [2021-11-20 06:43:01,294 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-11-20 06:43:01,295 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 50 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:43:01,295 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 59 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 49 Invalid, 0 Unknown, 54 Unchecked, 0.2s Time] [2021-11-20 06:43:01,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-11-20 06:43:01,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 56. [2021-11-20 06:43:01,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.3818181818181818) internal successors, (76), 55 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:43:01,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 76 transitions. [2021-11-20 06:43:01,306 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 76 transitions. Word has length 25 [2021-11-20 06:43:01,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:43:01,306 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 76 transitions. [2021-11-20 06:43:01,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:43:01,307 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 76 transitions. [2021-11-20 06:43:01,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-20 06:43:01,308 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:43:01,308 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:43:01,324 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-20 06:43:01,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:43:01,520 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:43:01,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:43:01,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1428424937, now seen corresponding path program 1 times [2021-11-20 06:43:01,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:43:01,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1914938276] [2021-11-20 06:43:01,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:43:01,521 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:43:01,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:43:01,522 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:43:01,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-20 06:43:01,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:01,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-20 06:43:01,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:43:02,257 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 06:43:02,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:43:02,931 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 06:43:02,931 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:43:02,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1914938276] [2021-11-20 06:43:02,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1914938276] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:43:02,931 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:43:02,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-11-20 06:43:02,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018183987] [2021-11-20 06:43:02,932 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:43:02,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-20 06:43:02,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:43:02,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-20 06:43:02,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2021-11-20 06:43:02,933 INFO L87 Difference]: Start difference. First operand 56 states and 76 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:43:03,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:43:03,852 INFO L93 Difference]: Finished difference Result 107 states and 148 transitions. [2021-11-20 06:43:03,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-20 06:43:03,852 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-11-20 06:43:03,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:43:03,853 INFO L225 Difference]: With dead ends: 107 [2021-11-20 06:43:03,853 INFO L226 Difference]: Without dead ends: 87 [2021-11-20 06:43:03,854 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2021-11-20 06:43:03,854 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 4 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 91 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:43:03,855 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 44 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 105 Invalid, 0 Unknown, 91 Unchecked, 0.5s Time] [2021-11-20 06:43:03,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-11-20 06:43:03,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 79. [2021-11-20 06:43:03,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.4230769230769231) internal successors, (111), 78 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:43:03,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 111 transitions. [2021-11-20 06:43:03,866 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 111 transitions. Word has length 26 [2021-11-20 06:43:03,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:43:03,867 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 111 transitions. [2021-11-20 06:43:03,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:43:03,867 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 111 transitions. [2021-11-20 06:43:03,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-20 06:43:03,869 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:43:03,869 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:43:03,886 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-20 06:43:04,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:43:04,082 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:43:04,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:43:04,082 INFO L85 PathProgramCache]: Analyzing trace with hash 442640276, now seen corresponding path program 4 times [2021-11-20 06:43:04,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:43:04,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [101418683] [2021-11-20 06:43:04,083 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 06:43:04,083 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:43:04,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:43:04,083 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:43:04,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-20 06:43:04,147 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 06:43:04,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:43:04,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 06:43:04,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:43:04,498 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 06:43:04,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:43:04,768 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 06:43:04,768 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:43:04,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [101418683] [2021-11-20 06:43:04,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [101418683] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:43:04,769 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:43:04,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-11-20 06:43:04,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509427469] [2021-11-20 06:43:04,769 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:43:04,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-20 06:43:04,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:43:04,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-20 06:43:04,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-11-20 06:43:04,770 INFO L87 Difference]: Start difference. First operand 79 states and 111 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:43:05,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:43:05,108 INFO L93 Difference]: Finished difference Result 171 states and 243 transitions. [2021-11-20 06:43:05,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-20 06:43:05,109 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-11-20 06:43:05,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:43:05,110 INFO L225 Difference]: With dead ends: 171 [2021-11-20 06:43:05,110 INFO L226 Difference]: Without dead ends: 136 [2021-11-20 06:43:05,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-11-20 06:43:05,112 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 24 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:43:05,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 65 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 43 Invalid, 0 Unknown, 36 Unchecked, 0.2s Time] [2021-11-20 06:43:05,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-11-20 06:43:05,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 113. [2021-11-20 06:43:05,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.4375) internal successors, (161), 112 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:43:05,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 161 transitions. [2021-11-20 06:43:05,130 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 161 transitions. Word has length 28 [2021-11-20 06:43:05,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:43:05,131 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 161 transitions. [2021-11-20 06:43:05,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:43:05,131 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 161 transitions. [2021-11-20 06:43:05,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-20 06:43:05,133 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:43:05,133 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:43:05,146 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-20 06:43:05,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:43:05,345 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:43:05,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:43:05,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1161564239, now seen corresponding path program 1 times [2021-11-20 06:43:05,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:43:05,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1055537762] [2021-11-20 06:43:05,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:43:05,346 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:43:05,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:43:05,347 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:43:05,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-20 06:43:05,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:05,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-20 06:43:05,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:43:05,797 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-20 06:43:05,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:43:06,154 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-20 06:43:06,155 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:43:06,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1055537762] [2021-11-20 06:43:06,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1055537762] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:43:06,155 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:43:06,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2021-11-20 06:43:06,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049734851] [2021-11-20 06:43:06,155 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:43:06,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-20 06:43:06,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:43:06,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-20 06:43:06,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-11-20 06:43:06,157 INFO L87 Difference]: Start difference. First operand 113 states and 161 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:43:06,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:43:06,526 INFO L93 Difference]: Finished difference Result 162 states and 231 transitions. [2021-11-20 06:43:06,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-20 06:43:06,526 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-11-20 06:43:06,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:43:06,527 INFO L225 Difference]: With dead ends: 162 [2021-11-20 06:43:06,528 INFO L226 Difference]: Without dead ends: 95 [2021-11-20 06:43:06,528 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-11-20 06:43:06,529 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 8 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:43:06,529 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 38 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 69 Invalid, 0 Unknown, 47 Unchecked, 0.3s Time] [2021-11-20 06:43:06,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-11-20 06:43:06,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 94. [2021-11-20 06:43:06,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.3978494623655915) internal successors, (130), 93 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:43:06,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 130 transitions. [2021-11-20 06:43:06,541 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 130 transitions. Word has length 28 [2021-11-20 06:43:06,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:43:06,542 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 130 transitions. [2021-11-20 06:43:06,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:43:06,542 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 130 transitions. [2021-11-20 06:43:06,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-20 06:43:06,544 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:43:06,544 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:43:06,572 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-11-20 06:43:06,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:43:06,757 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:43:06,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:43:06,757 INFO L85 PathProgramCache]: Analyzing trace with hash 1000420479, now seen corresponding path program 1 times [2021-11-20 06:43:06,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:43:06,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1206131054] [2021-11-20 06:43:06,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:43:06,758 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:43:06,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:43:06,759 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:43:06,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-20 06:43:06,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:06,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 06:43:06,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:43:06,944 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 06:43:06,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:43:07,086 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 06:43:07,086 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:43:07,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1206131054] [2021-11-20 06:43:07,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1206131054] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:43:07,086 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:43:07,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-11-20 06:43:07,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990747435] [2021-11-20 06:43:07,087 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:43:07,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 06:43:07,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:43:07,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 06:43:07,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:43:07,088 INFO L87 Difference]: Start difference. First operand 94 states and 130 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:43:08,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:43:08,926 INFO L93 Difference]: Finished difference Result 235 states and 328 transitions. [2021-11-20 06:43:08,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-20 06:43:08,927 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-11-20 06:43:08,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:43:08,928 INFO L225 Difference]: With dead ends: 235 [2021-11-20 06:43:08,928 INFO L226 Difference]: Without dead ends: 159 [2021-11-20 06:43:08,929 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=140, Invalid=240, Unknown=0, NotChecked=0, Total=380 [2021-11-20 06:43:08,930 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 152 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:43:08,930 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 46 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-20 06:43:08,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-11-20 06:43:08,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 101. [2021-11-20 06:43:08,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.4) internal successors, (140), 100 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:43:08,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 140 transitions. [2021-11-20 06:43:08,942 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 140 transitions. Word has length 29 [2021-11-20 06:43:08,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:43:08,943 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 140 transitions. [2021-11-20 06:43:08,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:43:08,943 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 140 transitions. [2021-11-20 06:43:08,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-20 06:43:08,945 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:43:08,945 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:43:08,964 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-20 06:43:09,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:43:09,157 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:43:09,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:43:09,157 INFO L85 PathProgramCache]: Analyzing trace with hash -1901938394, now seen corresponding path program 2 times [2021-11-20 06:43:09,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:43:09,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [791521231] [2021-11-20 06:43:09,158 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:43:09,158 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:43:09,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:43:09,159 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:43:09,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-20 06:43:09,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:43:09,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:43:09,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-20 06:43:09,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:43:10,058 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 06:43:10,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:43:10,738 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 06:43:10,739 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:43:10,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [791521231] [2021-11-20 06:43:10,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [791521231] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:43:10,739 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:43:10,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2021-11-20 06:43:10,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108477996] [2021-11-20 06:43:10,740 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:43:10,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-20 06:43:10,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:43:10,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-20 06:43:10,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2021-11-20 06:43:10,741 INFO L87 Difference]: Start difference. First operand 101 states and 140 transitions. Second operand has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:43:12,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:43:12,403 INFO L93 Difference]: Finished difference Result 237 states and 334 transitions. [2021-11-20 06:43:12,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-20 06:43:12,404 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-11-20 06:43:12,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:43:12,406 INFO L225 Difference]: With dead ends: 237 [2021-11-20 06:43:12,406 INFO L226 Difference]: Without dead ends: 233 [2021-11-20 06:43:12,407 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=320, Invalid=802, Unknown=0, NotChecked=0, Total=1122 [2021-11-20 06:43:12,408 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 108 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 219 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-20 06:43:12,408 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 98 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 94 Invalid, 0 Unknown, 219 Unchecked, 0.7s Time] [2021-11-20 06:43:12,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-11-20 06:43:12,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 181. [2021-11-20 06:43:12,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 1.4666666666666666) internal successors, (264), 180 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:43:12,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 264 transitions. [2021-11-20 06:43:12,424 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 264 transitions. Word has length 32 [2021-11-20 06:43:12,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:43:12,425 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 264 transitions. [2021-11-20 06:43:12,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:43:12,425 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 264 transitions. [2021-11-20 06:43:12,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-20 06:43:12,427 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:43:12,427 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:43:12,442 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-20 06:43:12,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:43:12,640 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:43:12,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:43:12,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1043073977, now seen corresponding path program 2 times [2021-11-20 06:43:12,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:43:12,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1004723671] [2021-11-20 06:43:12,641 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:43:12,641 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:43:12,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:43:12,642 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:43:12,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-20 06:43:12,761 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:43:12,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:43:12,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 06:43:12,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:43:12,853 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 06:43:12,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:43:12,994 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 06:43:12,995 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:43:12,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1004723671] [2021-11-20 06:43:12,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1004723671] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:43:12,995 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:43:12,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-11-20 06:43:12,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281487645] [2021-11-20 06:43:12,996 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:43:12,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 06:43:12,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:43:12,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 06:43:12,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:43:12,997 INFO L87 Difference]: Start difference. First operand 181 states and 264 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:43:13,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:43:13,761 INFO L93 Difference]: Finished difference Result 346 states and 492 transitions. [2021-11-20 06:43:13,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 06:43:13,762 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-11-20 06:43:13,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:43:13,764 INFO L225 Difference]: With dead ends: 346 [2021-11-20 06:43:13,764 INFO L226 Difference]: Without dead ends: 255 [2021-11-20 06:43:13,765 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-20 06:43:13,766 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 122 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-20 06:43:13,766 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 58 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-20 06:43:13,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-11-20 06:43:13,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 186. [2021-11-20 06:43:13,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 1.454054054054054) internal successors, (269), 185 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:43:13,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 269 transitions. [2021-11-20 06:43:13,787 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 269 transitions. Word has length 33 [2021-11-20 06:43:13,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:43:13,789 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 269 transitions. [2021-11-20 06:43:13,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:43:13,790 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 269 transitions. [2021-11-20 06:43:13,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-20 06:43:13,796 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:43:13,796 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:43:13,808 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-20 06:43:14,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:43:14,000 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:43:14,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:43:14,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1151546729, now seen corresponding path program 3 times [2021-11-20 06:43:14,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:43:14,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1151065621] [2021-11-20 06:43:14,001 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 06:43:14,001 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:43:14,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:43:14,002 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:43:14,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-20 06:43:14,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-20 06:43:14,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:43:14,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-20 06:43:14,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:43:14,715 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-20 06:43:14,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:43:14,899 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-20 06:43:14,900 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:43:14,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1151065621] [2021-11-20 06:43:14,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1151065621] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 06:43:14,901 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:43:14,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12 [2021-11-20 06:43:14,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381024605] [2021-11-20 06:43:14,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:43:14,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:43:14,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:43:14,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:43:14,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-11-20 06:43:14,902 INFO L87 Difference]: Start difference. First operand 186 states and 269 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:43:15,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:43:15,350 INFO L93 Difference]: Finished difference Result 233 states and 337 transitions. [2021-11-20 06:43:15,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 06:43:15,351 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-20 06:43:15,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:43:15,353 INFO L225 Difference]: With dead ends: 233 [2021-11-20 06:43:15,353 INFO L226 Difference]: Without dead ends: 216 [2021-11-20 06:43:15,354 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-11-20 06:43:15,354 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 19 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:43:15,355 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 24 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 06:43:15,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-11-20 06:43:15,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 210. [2021-11-20 06:43:15,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 1.4497607655502391) internal successors, (303), 209 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:43:15,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 303 transitions. [2021-11-20 06:43:15,371 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 303 transitions. Word has length 34 [2021-11-20 06:43:15,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:43:15,371 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 303 transitions. [2021-11-20 06:43:15,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:43:15,371 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 303 transitions. [2021-11-20 06:43:15,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-20 06:43:15,372 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:43:15,373 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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 06:43:15,388 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-11-20 06:43:15,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:43:15,585 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:43:15,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:43:15,586 INFO L85 PathProgramCache]: Analyzing trace with hash -13808093, now seen corresponding path program 3 times [2021-11-20 06:43:15,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:43:15,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1315609598] [2021-11-20 06:43:15,587 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 06:43:15,587 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:43:15,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:43:15,588 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:43:15,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-20 06:43:15,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-20 06:43:15,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:43:15,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-20 06:43:15,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:43:16,108 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-20 06:43:16,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:43:16,459 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-20 06:43:16,460 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:43:16,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1315609598] [2021-11-20 06:43:16,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1315609598] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:43:16,460 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:43:16,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2021-11-20 06:43:16,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903518360] [2021-11-20 06:43:16,461 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:43:16,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-20 06:43:16,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:43:16,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-20 06:43:16,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-11-20 06:43:16,462 INFO L87 Difference]: Start difference. First operand 210 states and 303 transitions. Second operand has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:43:16,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:43:16,567 INFO L93 Difference]: Finished difference Result 228 states and 328 transitions. [2021-11-20 06:43:16,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-20 06:43:16,568 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-11-20 06:43:16,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:43:16,570 INFO L225 Difference]: With dead ends: 228 [2021-11-20 06:43:16,570 INFO L226 Difference]: Without dead ends: 220 [2021-11-20 06:43:16,570 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-11-20 06:43:16,571 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:43:16,571 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 42 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 33 Unchecked, 0.1s Time] [2021-11-20 06:43:16,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-11-20 06:43:16,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 220. [2021-11-20 06:43:16,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 1.447488584474886) internal successors, (317), 219 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:43:16,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 317 transitions. [2021-11-20 06:43:16,591 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 317 transitions. Word has length 35 [2021-11-20 06:43:16,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:43:16,591 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 317 transitions. [2021-11-20 06:43:16,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:43:16,592 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 317 transitions. [2021-11-20 06:43:16,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-20 06:43:16,593 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:43:16,593 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:43:16,615 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-20 06:43:16,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:43:16,803 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:43:16,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:43:16,804 INFO L85 PathProgramCache]: Analyzing trace with hash -491382337, now seen corresponding path program 4 times [2021-11-20 06:43:16,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:43:16,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [876249211] [2021-11-20 06:43:16,804 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 06:43:16,805 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:43:16,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:43:16,807 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:43:16,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-20 06:43:16,942 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 06:43:16,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:43:16,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-20 06:43:16,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:43:17,499 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 26 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 06:43:17,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:43:18,023 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 06:43:18,023 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:43:18,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [876249211] [2021-11-20 06:43:18,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [876249211] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:43:18,023 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:43:18,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-11-20 06:43:18,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771157933] [2021-11-20 06:43:18,024 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:43:18,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-20 06:43:18,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:43:18,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-20 06:43:18,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-11-20 06:43:18,025 INFO L87 Difference]: Start difference. First operand 220 states and 317 transitions. Second operand has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 18 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:43:18,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:43:18,961 INFO L93 Difference]: Finished difference Result 527 states and 778 transitions. [2021-11-20 06:43:18,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-20 06:43:18,962 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 18 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-20 06:43:18,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:43:18,965 INFO L225 Difference]: With dead ends: 527 [2021-11-20 06:43:18,966 INFO L226 Difference]: Without dead ends: 507 [2021-11-20 06:43:18,966 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 54 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=171, Invalid=429, Unknown=0, NotChecked=0, Total=600 [2021-11-20 06:43:18,967 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 115 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 87 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:43:18,967 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 80 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 71 Invalid, 0 Unknown, 87 Unchecked, 0.5s Time] [2021-11-20 06:43:18,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2021-11-20 06:43:18,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 413. [2021-11-20 06:43:18,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 1.5) internal successors, (618), 412 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:43:19,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 618 transitions. [2021-11-20 06:43:19,001 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 618 transitions. Word has length 36 [2021-11-20 06:43:19,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:43:19,001 INFO L470 AbstractCegarLoop]: Abstraction has 413 states and 618 transitions. [2021-11-20 06:43:19,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 18 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:43:19,002 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 618 transitions. [2021-11-20 06:43:19,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-20 06:43:19,004 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:43:19,004 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:43:19,022 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-20 06:43:19,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:43:19,217 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:43:19,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:43:19,218 INFO L85 PathProgramCache]: Analyzing trace with hash 430958967, now seen corresponding path program 4 times [2021-11-20 06:43:19,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:43:19,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1484142345] [2021-11-20 06:43:19,218 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 06:43:19,218 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:43:19,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:43:19,219 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:43:19,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-20 06:43:19,383 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 06:43:19,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:43:19,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-20 06:43:19,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:43:19,928 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 14 proven. 32 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 06:43:19,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:43:20,470 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 14 proven. 32 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 06:43:20,471 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:43:20,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1484142345] [2021-11-20 06:43:20,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1484142345] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:43:20,471 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:43:20,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2021-11-20 06:43:20,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472897272] [2021-11-20 06:43:20,471 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:43:20,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-20 06:43:20,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:43:20,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-20 06:43:20,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2021-11-20 06:43:20,473 INFO L87 Difference]: Start difference. First operand 413 states and 618 transitions. Second operand has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:43:24,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:43:24,668 INFO L93 Difference]: Finished difference Result 1182 states and 1810 transitions. [2021-11-20 06:43:24,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-20 06:43:24,669 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-11-20 06:43:24,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:43:24,675 INFO L225 Difference]: With dead ends: 1182 [2021-11-20 06:43:24,676 INFO L226 Difference]: Without dead ends: 999 [2021-11-20 06:43:24,677 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=393, Invalid=797, Unknown=0, NotChecked=0, Total=1190 [2021-11-20 06:43:24,678 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 90 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 219 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:43:24,678 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 163 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 117 Invalid, 0 Unknown, 219 Unchecked, 1.1s Time] [2021-11-20 06:43:24,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 999 states. [2021-11-20 06:43:24,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 999 to 896. [2021-11-20 06:43:24,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 1.5463687150837988) internal successors, (1384), 895 states have internal predecessors, (1384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:43:24,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 1384 transitions. [2021-11-20 06:43:24,754 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 1384 transitions. Word has length 40 [2021-11-20 06:43:24,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:43:24,754 INFO L470 AbstractCegarLoop]: Abstraction has 896 states and 1384 transitions. [2021-11-20 06:43:24,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:43:24,755 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 1384 transitions. [2021-11-20 06:43:24,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-20 06:43:24,757 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:43:24,757 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:43:24,779 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-20 06:43:24,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:43:24,971 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:43:24,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:43:24,977 INFO L85 PathProgramCache]: Analyzing trace with hash 853660793, now seen corresponding path program 5 times [2021-11-20 06:43:24,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:43:24,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [773199393] [2021-11-20 06:43:24,978 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 06:43:24,978 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:43:24,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:43:24,979 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:43:25,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-20 06:43:25,096 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-20 06:43:25,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:43:25,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-20 06:43:25,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:43:25,820 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 27 proven. 12 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 06:43:25,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:43:27,537 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 27 proven. 12 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 06:43:27,538 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:43:27,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [773199393] [2021-11-20 06:43:27,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [773199393] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:43:27,538 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:43:27,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-11-20 06:43:27,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007715608] [2021-11-20 06:43:27,538 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:43:27,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-20 06:43:27,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:43:27,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-20 06:43:27,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-11-20 06:43:27,540 INFO L87 Difference]: Start difference. First operand 896 states and 1384 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:43:37,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:43:37,875 INFO L93 Difference]: Finished difference Result 1799 states and 2744 transitions. [2021-11-20 06:43:37,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-20 06:43:37,877 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-11-20 06:43:37,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:43:37,882 INFO L225 Difference]: With dead ends: 1799 [2021-11-20 06:43:37,883 INFO L226 Difference]: Without dead ends: 981 [2021-11-20 06:43:37,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=379, Invalid=953, Unknown=0, NotChecked=0, Total=1332 [2021-11-20 06:43:37,886 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 92 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:43:37,886 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 41 Invalid, 513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 440 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2021-11-20 06:43:37,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 981 states. [2021-11-20 06:43:37,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 981 to 721. [2021-11-20 06:43:37,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 721 states, 720 states have (on average 1.4291666666666667) internal successors, (1029), 720 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:43:37,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721 states to 721 states and 1029 transitions. [2021-11-20 06:43:37,963 INFO L78 Accepts]: Start accepts. Automaton has 721 states and 1029 transitions. Word has length 40 [2021-11-20 06:43:37,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:43:37,963 INFO L470 AbstractCegarLoop]: Abstraction has 721 states and 1029 transitions. [2021-11-20 06:43:37,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:43:37,964 INFO L276 IsEmpty]: Start isEmpty. Operand 721 states and 1029 transitions. [2021-11-20 06:43:37,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-20 06:43:37,965 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:43:37,966 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:43:37,978 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-20 06:43:38,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:43:38,178 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:43:38,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:43:38,178 INFO L85 PathProgramCache]: Analyzing trace with hash -1033690875, now seen corresponding path program 5 times [2021-11-20 06:43:38,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:43:38,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1052899449] [2021-11-20 06:43:38,179 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 06:43:38,179 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:43:38,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:43:38,180 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:43:38,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-20 06:43:38,342 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-11-20 06:43:38,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:43:38,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-20 06:43:38,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:43:38,613 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 27 proven. 14 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 06:43:38,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:43:38,908 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 06:43:38,908 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:43:38,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1052899449] [2021-11-20 06:43:38,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1052899449] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:43:38,908 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:43:38,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 17 [2021-11-20 06:43:38,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341697819] [2021-11-20 06:43:38,909 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:43:38,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-20 06:43:38,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:43:38,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-20 06:43:38,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-11-20 06:43:38,910 INFO L87 Difference]: Start difference. First operand 721 states and 1029 transitions. Second operand has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:43:40,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:43:40,052 INFO L93 Difference]: Finished difference Result 1596 states and 2280 transitions. [2021-11-20 06:43:40,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-20 06:43:40,060 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-11-20 06:43:40,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:43:40,064 INFO L225 Difference]: With dead ends: 1596 [2021-11-20 06:43:40,064 INFO L226 Difference]: Without dead ends: 967 [2021-11-20 06:43:40,066 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=109, Invalid=311, Unknown=0, NotChecked=0, Total=420 [2021-11-20 06:43:40,067 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 223 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:43:40,067 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 148 Invalid, 471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-20 06:43:40,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 967 states. [2021-11-20 06:43:40,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 967 to 713. [2021-11-20 06:43:40,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 713 states, 712 states have (on average 1.375) internal successors, (979), 712 states have internal predecessors, (979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:43:40,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 979 transitions. [2021-11-20 06:43:40,140 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 979 transitions. Word has length 41 [2021-11-20 06:43:40,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:43:40,140 INFO L470 AbstractCegarLoop]: Abstraction has 713 states and 979 transitions. [2021-11-20 06:43:40,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:43:40,140 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 979 transitions. [2021-11-20 06:43:40,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-20 06:43:40,142 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:43:40,142 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:43:40,157 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-20 06:43:40,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:43:40,352 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:43:40,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:43:40,353 INFO L85 PathProgramCache]: Analyzing trace with hash -533293431, now seen corresponding path program 6 times [2021-11-20 06:43:40,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:43:40,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [298581917] [2021-11-20 06:43:40,353 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-20 06:43:40,353 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:43:40,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:43:40,355 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:43:40,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-20 06:43:40,448 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-11-20 06:43:40,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:43:40,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-20 06:43:40,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:43:41,559 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 19 proven. 22 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-20 06:43:41,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:43:43,945 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-20 06:43:43,945 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:43:43,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [298581917] [2021-11-20 06:43:43,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [298581917] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:43:43,946 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:43:43,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-11-20 06:43:43,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412370108] [2021-11-20 06:43:43,946 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:43:43,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-20 06:43:43,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:43:43,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-20 06:43:43,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-11-20 06:43:43,947 INFO L87 Difference]: Start difference. First operand 713 states and 979 transitions. Second operand has 21 states, 21 states have (on average 3.0) internal successors, (63), 21 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:43:47,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:43:47,917 INFO L93 Difference]: Finished difference Result 825 states and 1111 transitions. [2021-11-20 06:43:47,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-20 06:43:47,918 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 21 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-20 06:43:47,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:43:47,921 INFO L225 Difference]: With dead ends: 825 [2021-11-20 06:43:47,921 INFO L226 Difference]: Without dead ends: 784 [2021-11-20 06:43:47,922 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=178, Invalid=472, Unknown=0, NotChecked=0, Total=650 [2021-11-20 06:43:47,923 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 24 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:43:47,923 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 54 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 21 Invalid, 0 Unknown, 57 Unchecked, 0.1s Time] [2021-11-20 06:43:47,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 784 states. [2021-11-20 06:43:48,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 784 to 772. [2021-11-20 06:43:48,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 771 states have (on average 1.3605706874189365) internal successors, (1049), 771 states have internal predecessors, (1049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:43:48,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 1049 transitions. [2021-11-20 06:43:48,010 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 1049 transitions. Word has length 44 [2021-11-20 06:43:48,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:43:48,011 INFO L470 AbstractCegarLoop]: Abstraction has 772 states and 1049 transitions. [2021-11-20 06:43:48,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 21 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:43:48,011 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 1049 transitions. [2021-11-20 06:43:48,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-20 06:43:48,012 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:43:48,013 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:43:48,032 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-20 06:43:48,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:43:48,225 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:43:48,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:43:48,225 INFO L85 PathProgramCache]: Analyzing trace with hash -2128406035, now seen corresponding path program 7 times [2021-11-20 06:43:48,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:43:48,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [392946149] [2021-11-20 06:43:48,226 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-20 06:43:48,226 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:43:48,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:43:48,226 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:43:48,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-20 06:43:48,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:48,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-20 06:43:48,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:43:49,082 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 12 proven. 60 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 06:43:49,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:43:50,025 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 12 proven. 60 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 06:43:50,026 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:43:50,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [392946149] [2021-11-20 06:43:50,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [392946149] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:43:50,026 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:43:50,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 26 [2021-11-20 06:43:50,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969049919] [2021-11-20 06:43:50,026 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:43:50,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-20 06:43:50,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:43:50,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-20 06:43:50,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=489, Unknown=0, NotChecked=0, Total=650 [2021-11-20 06:43:50,027 INFO L87 Difference]: Start difference. First operand 772 states and 1049 transitions. Second operand has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 26 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:43:57,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:43:57,987 INFO L93 Difference]: Finished difference Result 1973 states and 2714 transitions. [2021-11-20 06:43:57,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-11-20 06:43:57,988 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 26 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-20 06:43:57,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:43:57,995 INFO L225 Difference]: With dead ends: 1973 [2021-11-20 06:43:57,995 INFO L226 Difference]: Without dead ends: 1780 [2021-11-20 06:43:57,997 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 67 SyntacticMatches, 10 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1090 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=715, Invalid=2041, Unknown=0, NotChecked=0, Total=2756 [2021-11-20 06:43:57,997 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 111 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 390 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:43:57,998 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 223 Invalid, 715 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 284 Invalid, 0 Unknown, 390 Unchecked, 2.0s Time] [2021-11-20 06:43:58,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1780 states. [2021-11-20 06:43:58,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1780 to 1668. [2021-11-20 06:43:58,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1668 states, 1667 states have (on average 1.3827234553089383) internal successors, (2305), 1667 states have internal predecessors, (2305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:43:58,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1668 states to 1668 states and 2305 transitions. [2021-11-20 06:43:58,158 INFO L78 Accepts]: Start accepts. Automaton has 1668 states and 2305 transitions. Word has length 44 [2021-11-20 06:43:58,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:43:58,159 INFO L470 AbstractCegarLoop]: Abstraction has 1668 states and 2305 transitions. [2021-11-20 06:43:58,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 26 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:43:58,159 INFO L276 IsEmpty]: Start isEmpty. Operand 1668 states and 2305 transitions. [2021-11-20 06:43:58,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-20 06:43:58,161 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:43:58,161 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:43:58,179 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-20 06:43:58,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:43:58,379 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:43:58,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:43:58,380 INFO L85 PathProgramCache]: Analyzing trace with hash -570401652, now seen corresponding path program 8 times [2021-11-20 06:43:58,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:43:58,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1768720410] [2021-11-20 06:43:58,381 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:43:58,381 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:43:58,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:43:58,382 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:43:58,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f883eb3f-fe86-433e-9347-ef7d0d581c2a/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-20 06:43:58,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:43:58,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:43:58,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-20 06:43:58,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:43:58,863 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 21 treesize of output 17 [2021-11-20 06:43:59,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:43:59,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 37 [2021-11-20 06:43:59,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:43:59,971 INFO L354 Elim1Store]: treesize reduction 56, result has 43.4 percent of original size [2021-11-20 06:43:59,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 70 [2021-11-20 06:44:00,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:44:00,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:44:00,591 INFO L354 Elim1Store]: treesize reduction 102, result has 14.3 percent of original size [2021-11-20 06:44:00,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 52 treesize of output 57 [2021-11-20 06:44:03,551 INFO L354 Elim1Store]: treesize reduction 64, result has 1.5 percent of original size [2021-11-20 06:44:03,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 77 treesize of output 33 [2021-11-20 06:44:03,670 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:44:03,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:44:41,320 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 283 treesize of output 275 [2021-11-20 06:44:43,659 INFO L354 Elim1Store]: treesize reduction 41, result has 53.4 percent of original size [2021-11-20 06:44:43,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 4088353962 treesize of output 4000273624