./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/reducercommutativity/rangesum40.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1a6c31-b817-4b9c-a5c0-95755494fb5a/bin/uautomizer-ZXIjhQolGL/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1a6c31-b817-4b9c-a5c0-95755494fb5a/bin/uautomizer-ZXIjhQolGL/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1a6c31-b817-4b9c-a5c0-95755494fb5a/bin/uautomizer-ZXIjhQolGL/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1a6c31-b817-4b9c-a5c0-95755494fb5a/bin/uautomizer-ZXIjhQolGL/config/AutomizerReach.xml -i ../../sv-benchmarks/c/reducercommutativity/rangesum40.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1a6c31-b817-4b9c-a5c0-95755494fb5a/bin/uautomizer-ZXIjhQolGL/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1a6c31-b817-4b9c-a5c0-95755494fb5a/bin/uautomizer-ZXIjhQolGL --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 a418834dbd1069728d4982a06f4275da717a1d93e3d5061fbbc21c5c3a319ddf --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 04:29:27,136 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 04:29:27,139 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 04:29:27,183 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 04:29:27,184 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 04:29:27,186 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 04:29:27,188 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 04:29:27,192 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 04:29:27,195 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 04:29:27,197 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 04:29:27,199 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 04:29:27,201 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 04:29:27,202 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 04:29:27,204 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 04:29:27,206 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 04:29:27,209 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 04:29:27,210 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 04:29:27,212 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 04:29:27,216 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 04:29:27,219 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 04:29:27,222 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 04:29:27,225 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 04:29:27,227 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 04:29:27,229 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 04:29:27,234 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 04:29:27,235 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 04:29:27,235 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 04:29:27,237 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 04:29:27,238 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 04:29:27,240 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 04:29:27,240 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 04:29:27,242 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 04:29:27,243 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 04:29:27,245 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 04:29:27,247 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 04:29:27,248 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 04:29:27,249 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 04:29:27,250 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 04:29:27,250 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 04:29:27,252 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 04:29:27,254 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 04:29:27,255 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1a6c31-b817-4b9c-a5c0-95755494fb5a/bin/uautomizer-ZXIjhQolGL/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-19 04:29:27,289 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 04:29:27,290 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 04:29:27,291 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-19 04:29:27,291 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-19 04:29:27,292 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 04:29:27,293 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 04:29:27,294 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-19 04:29:27,295 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-19 04:29:27,295 INFO L138 SettingsManager]: * Use SBE=true [2021-11-19 04:29:27,296 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 04:29:27,297 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 04:29:27,297 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 04:29:27,298 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 04:29:27,298 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 04:29:27,299 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 04:29:27,299 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 04:29:27,300 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 04:29:27,300 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 04:29:27,301 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 04:29:27,301 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 04:29:27,302 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 04:29:27,302 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 04:29:27,303 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 04:29:27,303 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 04:29:27,303 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 04:29:27,304 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 04:29:27,304 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 04:29:27,304 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 04:29:27,305 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-19 04:29:27,305 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 04:29:27,305 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-19 04:29:27,306 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-19 04:29:27,306 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 04:29:27,306 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 04:29:27,306 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_9b1a6c31-b817-4b9c-a5c0-95755494fb5a/bin/uautomizer-ZXIjhQolGL/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1a6c31-b817-4b9c-a5c0-95755494fb5a/bin/uautomizer-ZXIjhQolGL Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a418834dbd1069728d4982a06f4275da717a1d93e3d5061fbbc21c5c3a319ddf [2021-11-19 04:29:27,620 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 04:29:27,651 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 04:29:27,654 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 04:29:27,656 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 04:29:27,657 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 04:29:27,660 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1a6c31-b817-4b9c-a5c0-95755494fb5a/bin/uautomizer-ZXIjhQolGL/../../sv-benchmarks/c/reducercommutativity/rangesum40.i [2021-11-19 04:29:27,770 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1a6c31-b817-4b9c-a5c0-95755494fb5a/bin/uautomizer-ZXIjhQolGL/data/fd24f421c/591b3033f89549bc9ef10332c2c3a22f/FLAGbc4a9a9f2 [2021-11-19 04:29:28,520 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 04:29:28,521 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1a6c31-b817-4b9c-a5c0-95755494fb5a/sv-benchmarks/c/reducercommutativity/rangesum40.i [2021-11-19 04:29:28,533 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1a6c31-b817-4b9c-a5c0-95755494fb5a/bin/uautomizer-ZXIjhQolGL/data/fd24f421c/591b3033f89549bc9ef10332c2c3a22f/FLAGbc4a9a9f2 [2021-11-19 04:29:28,846 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1a6c31-b817-4b9c-a5c0-95755494fb5a/bin/uautomizer-ZXIjhQolGL/data/fd24f421c/591b3033f89549bc9ef10332c2c3a22f [2021-11-19 04:29:28,849 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 04:29:28,855 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 04:29:28,857 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 04:29:28,858 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 04:29:28,862 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 04:29:28,863 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:29:28" (1/1) ... [2021-11-19 04:29:28,864 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6fdab55e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:29:28, skipping insertion in model container [2021-11-19 04:29:28,865 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:29:28" (1/1) ... [2021-11-19 04:29:28,874 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 04:29:28,895 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 04:29:29,147 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_9b1a6c31-b817-4b9c-a5c0-95755494fb5a/sv-benchmarks/c/reducercommutativity/rangesum40.i[1465,1478] [2021-11-19 04:29:29,152 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 04:29:29,163 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 04:29:29,194 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_9b1a6c31-b817-4b9c-a5c0-95755494fb5a/sv-benchmarks/c/reducercommutativity/rangesum40.i[1465,1478] [2021-11-19 04:29:29,195 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 04:29:29,218 INFO L208 MainTranslator]: Completed translation [2021-11-19 04:29:29,218 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:29:29 WrapperNode [2021-11-19 04:29:29,219 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 04:29:29,221 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 04:29:29,222 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 04:29:29,222 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 04:29:29,232 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:29:29" (1/1) ... [2021-11-19 04:29:29,247 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:29:29" (1/1) ... [2021-11-19 04:29:29,285 INFO L137 Inliner]: procedures = 17, calls = 23, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 70 [2021-11-19 04:29:29,286 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 04:29:29,287 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 04:29:29,288 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 04:29:29,288 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 04:29:29,300 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:29:29" (1/1) ... [2021-11-19 04:29:29,301 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:29:29" (1/1) ... [2021-11-19 04:29:29,304 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:29:29" (1/1) ... [2021-11-19 04:29:29,305 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:29:29" (1/1) ... [2021-11-19 04:29:29,314 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:29:29" (1/1) ... [2021-11-19 04:29:29,320 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:29:29" (1/1) ... [2021-11-19 04:29:29,322 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:29:29" (1/1) ... [2021-11-19 04:29:29,325 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 04:29:29,326 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 04:29:29,327 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 04:29:29,327 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 04:29:29,329 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:29:29" (1/1) ... [2021-11-19 04:29:29,341 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 04:29:29,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1a6c31-b817-4b9c-a5c0-95755494fb5a/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:29:29,375 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1a6c31-b817-4b9c-a5c0-95755494fb5a/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 04:29:29,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1a6c31-b817-4b9c-a5c0-95755494fb5a/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 04:29:29,429 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 04:29:29,429 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-19 04:29:29,430 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-19 04:29:29,430 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-19 04:29:29,430 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 04:29:29,430 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 04:29:29,430 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-19 04:29:29,431 INFO L130 BoogieDeclarations]: Found specification of procedure rangesum [2021-11-19 04:29:29,431 INFO L138 BoogieDeclarations]: Found implementation of procedure rangesum [2021-11-19 04:29:29,431 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-19 04:29:29,523 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 04:29:29,525 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 04:29:29,725 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 04:29:29,734 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 04:29:29,734 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-19 04:29:29,736 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:29:29 BoogieIcfgContainer [2021-11-19 04:29:29,737 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 04:29:29,739 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 04:29:29,739 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 04:29:29,744 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 04:29:29,744 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 04:29:28" (1/3) ... [2021-11-19 04:29:29,745 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21c950f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:29:29, skipping insertion in model container [2021-11-19 04:29:29,746 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:29:29" (2/3) ... [2021-11-19 04:29:29,746 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21c950f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:29:29, skipping insertion in model container [2021-11-19 04:29:29,746 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:29:29" (3/3) ... [2021-11-19 04:29:29,748 INFO L111 eAbstractionObserver]: Analyzing ICFG rangesum40.i [2021-11-19 04:29:29,755 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 04:29:29,755 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 04:29:29,822 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 04:29:29,833 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 [2021-11-19 04:29:29,833 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 04:29:29,886 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 23 states have internal predecessors, (32), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-19 04:29:29,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-19 04:29:29,896 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:29:29,897 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:29:29,898 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:29:29,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:29:29,922 INFO L85 PathProgramCache]: Analyzing trace with hash -275565944, now seen corresponding path program 1 times [2021-11-19 04:29:29,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:29:29,934 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64967157] [2021-11-19 04:29:29,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:29:29,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:29:30,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:29:30,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-19 04:29:30,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:29:30,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-19 04:29:30,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:29:30,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-19 04:29:30,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:29:30,291 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 04:29:30,292 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:29:30,305 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64967157] [2021-11-19 04:29:30,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64967157] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:29:30,307 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:29:30,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 04:29:30,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865011318] [2021-11-19 04:29:30,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:29:30,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 04:29:30,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:29:30,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 04:29:30,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:29:30,385 INFO L87 Difference]: Start difference. First operand has 28 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 23 states have internal predecessors, (32), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-19 04:29:30,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:29:30,454 INFO L93 Difference]: Finished difference Result 54 states and 77 transitions. [2021-11-19 04:29:30,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 04:29:30,464 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 29 [2021-11-19 04:29:30,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:29:30,478 INFO L225 Difference]: With dead ends: 54 [2021-11-19 04:29:30,478 INFO L226 Difference]: Without dead ends: 26 [2021-11-19 04:29:30,483 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:29:30,491 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 1 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:29:30,495 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 62 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 04:29:30,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-11-19 04:29:30,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2021-11-19 04:29:30,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-19 04:29:30,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2021-11-19 04:29:30,594 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 29 [2021-11-19 04:29:30,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:29:30,595 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2021-11-19 04:29:30,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-19 04:29:30,595 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2021-11-19 04:29:30,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-19 04:29:30,598 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:29:30,599 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:29:30,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-19 04:29:30,599 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:29:30,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:29:30,601 INFO L85 PathProgramCache]: Analyzing trace with hash -653100523, now seen corresponding path program 1 times [2021-11-19 04:29:30,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:29:30,602 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414488342] [2021-11-19 04:29:30,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:29:30,602 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:29:30,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:29:30,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-19 04:29:30,681 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:29:30,682 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414488342] [2021-11-19 04:29:30,682 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2021-11-19 04:29:30,682 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192971234] [2021-11-19 04:29:30,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:29:30,683 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:29:30,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1a6c31-b817-4b9c-a5c0-95755494fb5a/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:29:30,690 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1a6c31-b817-4b9c-a5c0-95755494fb5a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:29:30,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1a6c31-b817-4b9c-a5c0-95755494fb5a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-19 04:29:30,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:29:30,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 04:29:30,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:29:31,000 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 04:29:31,001 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 04:29:31,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192971234] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:29:31,002 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:29:31,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 04:29:31,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683112132] [2021-11-19 04:29:31,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:29:31,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 04:29:31,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:29:31,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 04:29:31,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:29:31,007 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-19 04:29:31,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:29:31,048 INFO L93 Difference]: Finished difference Result 46 states and 61 transitions. [2021-11-19 04:29:31,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 04:29:31,050 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2021-11-19 04:29:31,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:29:31,053 INFO L225 Difference]: With dead ends: 46 [2021-11-19 04:29:31,054 INFO L226 Difference]: Without dead ends: 28 [2021-11-19 04:29:31,055 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:29:31,059 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 2 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:29:31,061 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 51 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 04:29:31,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-11-19 04:29:31,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2021-11-19 04:29:31,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-19 04:29:31,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2021-11-19 04:29:31,078 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 31 [2021-11-19 04:29:31,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:29:31,080 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2021-11-19 04:29:31,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-19 04:29:31,080 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2021-11-19 04:29:31,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-19 04:29:31,084 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:29:31,085 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:29:31,128 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1a6c31-b817-4b9c-a5c0-95755494fb5a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-19 04:29:31,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1a6c31-b817-4b9c-a5c0-95755494fb5a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-11-19 04:29:31,303 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:29:31,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:29:31,305 INFO L85 PathProgramCache]: Analyzing trace with hash -1081404920, now seen corresponding path program 1 times [2021-11-19 04:29:31,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:29:31,305 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105643663] [2021-11-19 04:29:31,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:29:31,306 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:29:31,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:29:31,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-19 04:29:31,371 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:29:31,372 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105643663] [2021-11-19 04:29:31,372 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2021-11-19 04:29:31,372 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258976599] [2021-11-19 04:29:31,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:29:31,373 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:29:31,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1a6c31-b817-4b9c-a5c0-95755494fb5a/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:29:31,374 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1a6c31-b817-4b9c-a5c0-95755494fb5a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:29:31,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1a6c31-b817-4b9c-a5c0-95755494fb5a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-19 04:29:31,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:29:31,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 04:29:31,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:29:31,613 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-19 04:29:31,614 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 04:29:31,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258976599] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:29:31,615 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:29:31,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 04:29:31,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687755134] [2021-11-19 04:29:31,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:29:31,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 04:29:31,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:29:31,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 04:29:31,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:29:31,621 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-19 04:29:31,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:29:31,647 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2021-11-19 04:29:31,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 04:29:31,648 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 40 [2021-11-19 04:29:31,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:29:31,650 INFO L225 Difference]: With dead ends: 44 [2021-11-19 04:29:31,651 INFO L226 Difference]: Without dead ends: 29 [2021-11-19 04:29:31,652 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:29:31,656 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 1 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:29:31,659 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 53 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 04:29:31,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-19 04:29:31,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2021-11-19 04:29:31,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-19 04:29:31,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2021-11-19 04:29:31,683 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 40 [2021-11-19 04:29:31,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:29:31,686 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2021-11-19 04:29:31,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-19 04:29:31,687 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2021-11-19 04:29:31,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-19 04:29:31,693 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:29:31,694 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:29:31,740 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1a6c31-b817-4b9c-a5c0-95755494fb5a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-19 04:29:31,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1a6c31-b817-4b9c-a5c0-95755494fb5a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:29:31,926 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:29:31,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:29:31,927 INFO L85 PathProgramCache]: Analyzing trace with hash -673301430, now seen corresponding path program 1 times [2021-11-19 04:29:31,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:29:31,927 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872574057] [2021-11-19 04:29:31,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:29:31,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:29:31,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:29:32,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-19 04:29:32,024 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:29:32,027 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872574057] [2021-11-19 04:29:32,027 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2021-11-19 04:29:32,027 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652316743] [2021-11-19 04:29:32,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:29:32,033 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:29:32,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1a6c31-b817-4b9c-a5c0-95755494fb5a/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:29:32,038 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1a6c31-b817-4b9c-a5c0-95755494fb5a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:29:32,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1a6c31-b817-4b9c-a5c0-95755494fb5a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-19 04:29:32,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:29:32,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 04:29:32,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:29:32,330 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-19 04:29:32,331 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 04:29:32,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652316743] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:29:32,335 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:29:32,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 04:29:32,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087695537] [2021-11-19 04:29:32,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:29:32,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 04:29:32,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:29:32,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 04:29:32,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:29:32,345 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-19 04:29:32,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:29:32,380 INFO L93 Difference]: Finished difference Result 55 states and 73 transitions. [2021-11-19 04:29:32,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 04:29:32,382 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 42 [2021-11-19 04:29:32,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:29:32,386 INFO L225 Difference]: With dead ends: 55 [2021-11-19 04:29:32,391 INFO L226 Difference]: Without dead ends: 34 [2021-11-19 04:29:32,392 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:29:32,393 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 2 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:29:32,395 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 54 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 04:29:32,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-11-19 04:29:32,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2021-11-19 04:29:32,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 27 states have internal predecessors, (34), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-19 04:29:32,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2021-11-19 04:29:32,408 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 42 [2021-11-19 04:29:32,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:29:32,408 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2021-11-19 04:29:32,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-19 04:29:32,409 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2021-11-19 04:29:32,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-19 04:29:32,411 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:29:32,411 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:29:32,460 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1a6c31-b817-4b9c-a5c0-95755494fb5a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-19 04:29:32,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1a6c31-b817-4b9c-a5c0-95755494fb5a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:29:32,637 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:29:32,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:29:32,638 INFO L85 PathProgramCache]: Analyzing trace with hash -1042180377, now seen corresponding path program 1 times [2021-11-19 04:29:32,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:29:32,639 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965128945] [2021-11-19 04:29:32,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:29:32,639 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:29:32,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:29:32,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-19 04:29:32,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:29:32,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-19 04:29:32,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:29:32,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-11-19 04:29:32,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:29:32,763 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 04:29:32,763 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:29:32,763 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965128945] [2021-11-19 04:29:32,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965128945] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:29:32,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478709149] [2021-11-19 04:29:32,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:29:32,764 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:29:32,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1a6c31-b817-4b9c-a5c0-95755494fb5a/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:29:32,770 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1a6c31-b817-4b9c-a5c0-95755494fb5a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:29:32,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1a6c31-b817-4b9c-a5c0-95755494fb5a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-19 04:29:32,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:29:32,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 04:29:32,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:29:33,010 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-19 04:29:33,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:29:33,175 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-19 04:29:33,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478709149] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:29:33,176 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:29:33,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2021-11-19 04:29:33,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560911999] [2021-11-19 04:29:33,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:29:33,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 04:29:33,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:29:33,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 04:29:33,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-19 04:29:33,180 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-19 04:29:33,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:29:33,252 INFO L93 Difference]: Finished difference Result 69 states and 92 transitions. [2021-11-19 04:29:33,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 04:29:33,252 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 42 [2021-11-19 04:29:33,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:29:33,254 INFO L225 Difference]: With dead ends: 69 [2021-11-19 04:29:33,254 INFO L226 Difference]: Without dead ends: 42 [2021-11-19 04:29:33,255 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-19 04:29:33,256 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 10 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:29:33,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 138 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:29:33,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-11-19 04:29:33,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2021-11-19 04:29:33,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 36 states have internal predecessors, (43), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-19 04:29:33,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2021-11-19 04:29:33,265 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 42 [2021-11-19 04:29:33,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:29:33,266 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2021-11-19 04:29:33,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-19 04:29:33,267 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2021-11-19 04:29:33,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-19 04:29:33,268 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:29:33,268 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:29:33,316 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1a6c31-b817-4b9c-a5c0-95755494fb5a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-19 04:29:33,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1a6c31-b817-4b9c-a5c0-95755494fb5a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:29:33,481 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:29:33,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:29:33,482 INFO L85 PathProgramCache]: Analyzing trace with hash -604386836, now seen corresponding path program 2 times [2021-11-19 04:29:33,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:29:33,482 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43533885] [2021-11-19 04:29:33,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:29:33,482 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:29:33,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:29:33,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 04:29:33,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:29:33,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-19 04:29:33,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:29:33,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-19 04:29:33,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:29:33,580 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-11-19 04:29:33,580 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:29:33,580 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43533885] [2021-11-19 04:29:33,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43533885] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:29:33,581 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290302059] [2021-11-19 04:29:33,581 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 04:29:33,582 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:29:33,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1a6c31-b817-4b9c-a5c0-95755494fb5a/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:29:33,583 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1a6c31-b817-4b9c-a5c0-95755494fb5a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:29:33,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1a6c31-b817-4b9c-a5c0-95755494fb5a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-19 04:29:33,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 04:29:33,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:29:33,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 04:29:33,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:29:33,898 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-11-19 04:29:33,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:29:34,144 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-11-19 04:29:34,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290302059] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:29:34,144 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:29:34,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2021-11-19 04:29:34,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945999088] [2021-11-19 04:29:34,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:29:34,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-19 04:29:34,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:29:34,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-19 04:29:34,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-11-19 04:29:34,152 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-19 04:29:34,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:29:34,280 INFO L93 Difference]: Finished difference Result 86 states and 112 transitions. [2021-11-19 04:29:34,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-19 04:29:34,284 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) Word has length 57 [2021-11-19 04:29:34,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:29:34,287 INFO L225 Difference]: With dead ends: 86 [2021-11-19 04:29:34,290 INFO L226 Difference]: Without dead ends: 56 [2021-11-19 04:29:34,291 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-11-19 04:29:34,294 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 16 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:29:34,295 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 112 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:29:34,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-11-19 04:29:34,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 51. [2021-11-19 04:29:34,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.108695652173913) internal successors, (51), 46 states have internal predecessors, (51), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-19 04:29:34,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2021-11-19 04:29:34,317 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 57 [2021-11-19 04:29:34,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:29:34,320 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2021-11-19 04:29:34,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-19 04:29:34,320 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2021-11-19 04:29:34,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-19 04:29:34,326 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:29:34,327 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 6, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:29:34,373 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1a6c31-b817-4b9c-a5c0-95755494fb5a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-19 04:29:34,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1a6c31-b817-4b9c-a5c0-95755494fb5a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-19 04:29:34,528 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:29:34,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:29:34,528 INFO L85 PathProgramCache]: Analyzing trace with hash 948362870, now seen corresponding path program 1 times [2021-11-19 04:29:34,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:29:34,529 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520798550] [2021-11-19 04:29:34,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:29:34,529 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:29:34,557 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:29:34,557 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1957458724] [2021-11-19 04:29:34,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:29:34,558 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:29:34,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1a6c31-b817-4b9c-a5c0-95755494fb5a/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:29:34,559 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1a6c31-b817-4b9c-a5c0-95755494fb5a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:29:34,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1a6c31-b817-4b9c-a5c0-95755494fb5a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-19 04:29:34,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:29:34,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-19 04:29:34,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:29:35,052 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2021-11-19 04:29:35,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:29:35,487 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2021-11-19 04:29:35,496 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:29:35,496 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520798550] [2021-11-19 04:29:35,497 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 04:29:35,497 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957458724] [2021-11-19 04:29:35,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957458724] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:29:35,497 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:29:35,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-11-19 04:29:35,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891346772] [2021-11-19 04:29:35,499 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 04:29:35,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-19 04:29:35,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:29:35,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-19 04:29:35,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-11-19 04:29:35,502 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 24 states have internal predecessors, (71), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-19 04:29:35,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:29:35,635 INFO L93 Difference]: Finished difference Result 103 states and 126 transitions. [2021-11-19 04:29:35,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-19 04:29:35,636 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 24 states have internal predecessors, (71), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 78 [2021-11-19 04:29:35,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:29:35,637 INFO L225 Difference]: With dead ends: 103 [2021-11-19 04:29:35,637 INFO L226 Difference]: Without dead ends: 75 [2021-11-19 04:29:35,639 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-11-19 04:29:35,640 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 22 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:29:35,640 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 236 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:29:35,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-11-19 04:29:35,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2021-11-19 04:29:35,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.0714285714285714) internal successors, (75), 70 states have internal predecessors, (75), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-19 04:29:35,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 81 transitions. [2021-11-19 04:29:35,652 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 81 transitions. Word has length 78 [2021-11-19 04:29:35,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:29:35,652 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 81 transitions. [2021-11-19 04:29:35,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 24 states have internal predecessors, (71), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-19 04:29:35,653 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 81 transitions. [2021-11-19 04:29:35,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-19 04:29:35,655 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:29:35,655 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 9, 9, 6, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:29:35,710 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1a6c31-b817-4b9c-a5c0-95755494fb5a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-19 04:29:35,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1a6c31-b817-4b9c-a5c0-95755494fb5a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:29:35,881 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:29:35,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:29:35,882 INFO L85 PathProgramCache]: Analyzing trace with hash 468172686, now seen corresponding path program 2 times [2021-11-19 04:29:35,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:29:35,882 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392171351] [2021-11-19 04:29:35,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:29:35,882 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:29:35,923 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:29:35,923 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1445706920] [2021-11-19 04:29:35,923 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 04:29:35,924 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:29:35,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1a6c31-b817-4b9c-a5c0-95755494fb5a/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:29:35,925 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1a6c31-b817-4b9c-a5c0-95755494fb5a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:29:35,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1a6c31-b817-4b9c-a5c0-95755494fb5a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-19 04:29:36,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 04:29:36,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:29:36,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-19 04:29:36,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:29:36,755 INFO L134 CoverageAnalysis]: Checked inductivity of 635 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2021-11-19 04:29:36,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:29:37,742 INFO L134 CoverageAnalysis]: Checked inductivity of 635 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2021-11-19 04:29:37,742 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:29:37,743 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392171351] [2021-11-19 04:29:37,743 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 04:29:37,743 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445706920] [2021-11-19 04:29:37,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445706920] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:29:37,744 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:29:37,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 42 [2021-11-19 04:29:37,744 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216407240] [2021-11-19 04:29:37,744 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 04:29:37,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-19 04:29:37,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:29:37,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-19 04:29:37,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-11-19 04:29:37,749 INFO L87 Difference]: Start difference. First operand 75 states and 81 transitions. Second operand has 42 states, 42 states have (on average 2.5952380952380953) internal successors, (109), 42 states have internal predecessors, (109), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-19 04:29:37,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:29:37,959 INFO L93 Difference]: Finished difference Result 139 states and 168 transitions. [2021-11-19 04:29:37,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-19 04:29:37,960 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.5952380952380953) internal successors, (109), 42 states have internal predecessors, (109), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 102 [2021-11-19 04:29:37,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:29:37,963 INFO L225 Difference]: With dead ends: 139 [2021-11-19 04:29:37,964 INFO L226 Difference]: Without dead ends: 111 [2021-11-19 04:29:37,968 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 161 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-11-19 04:29:37,969 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 40 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:29:37,970 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 106 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 04:29:37,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-11-19 04:29:37,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2021-11-19 04:29:37,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 106 states have (on average 1.0471698113207548) internal successors, (111), 106 states have internal predecessors, (111), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-19 04:29:38,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 117 transitions. [2021-11-19 04:29:38,003 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 117 transitions. Word has length 102 [2021-11-19 04:29:38,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:29:38,006 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 117 transitions. [2021-11-19 04:29:38,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.5952380952380953) internal successors, (109), 42 states have internal predecessors, (109), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-19 04:29:38,006 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 117 transitions. [2021-11-19 04:29:38,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-11-19 04:29:38,019 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:29:38,019 INFO L514 BasicCegarLoop]: trace histogram [40, 40, 9, 9, 6, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:29:38,067 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1a6c31-b817-4b9c-a5c0-95755494fb5a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-19 04:29:38,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1a6c31-b817-4b9c-a5c0-95755494fb5a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:29:38,220 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:29:38,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:29:38,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1859225038, now seen corresponding path program 3 times [2021-11-19 04:29:38,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:29:38,221 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104917612] [2021-11-19 04:29:38,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:29:38,222 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:29:38,284 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:29:38,285 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [402782787] [2021-11-19 04:29:38,285 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 04:29:38,285 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:29:38,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1a6c31-b817-4b9c-a5c0-95755494fb5a/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:29:38,286 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1a6c31-b817-4b9c-a5c0-95755494fb5a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:29:38,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1a6c31-b817-4b9c-a5c0-95755494fb5a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-19 04:29:38,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-19 04:29:38,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:29:38,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 04:29:38,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:29:38,717 INFO L134 CoverageAnalysis]: Checked inductivity of 1751 backedges. 76 proven. 1 refuted. 0 times theorem prover too weak. 1674 trivial. 0 not checked. [2021-11-19 04:29:38,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:29:39,029 INFO L134 CoverageAnalysis]: Checked inductivity of 1751 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1750 trivial. 0 not checked. [2021-11-19 04:29:39,030 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:29:39,030 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104917612] [2021-11-19 04:29:39,030 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 04:29:39,030 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402782787] [2021-11-19 04:29:39,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402782787] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:29:39,031 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:29:39,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-11-19 04:29:39,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364082454] [2021-11-19 04:29:39,035 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 04:29:39,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 04:29:39,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:29:39,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 04:29:39,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-19 04:29:39,039 INFO L87 Difference]: Start difference. First operand 111 states and 117 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-19 04:29:39,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:29:39,079 INFO L93 Difference]: Finished difference Result 137 states and 148 transitions. [2021-11-19 04:29:39,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 04:29:39,080 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 138 [2021-11-19 04:29:39,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:29:39,083 INFO L225 Difference]: With dead ends: 137 [2021-11-19 04:29:39,083 INFO L226 Difference]: Without dead ends: 117 [2021-11-19 04:29:39,085 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 270 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-19 04:29:39,089 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 6 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:29:39,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 78 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 04:29:39,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-11-19 04:29:39,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2021-11-19 04:29:39,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 112 states have (on average 1.0446428571428572) internal successors, (117), 112 states have internal predecessors, (117), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-19 04:29:39,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 123 transitions. [2021-11-19 04:29:39,133 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 123 transitions. Word has length 138 [2021-11-19 04:29:39,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:29:39,134 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 123 transitions. [2021-11-19 04:29:39,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-19 04:29:39,135 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 123 transitions. [2021-11-19 04:29:39,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-19 04:29:39,137 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:29:39,143 INFO L514 BasicCegarLoop]: trace histogram [40, 40, 9, 9, 6, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:29:39,191 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1a6c31-b817-4b9c-a5c0-95755494fb5a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-19 04:29:39,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1a6c31-b817-4b9c-a5c0-95755494fb5a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-19 04:29:39,344 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:29:39,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:29:39,345 INFO L85 PathProgramCache]: Analyzing trace with hash 424610296, now seen corresponding path program 4 times [2021-11-19 04:29:39,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:29:39,345 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378476240] [2021-11-19 04:29:39,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:29:39,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:29:39,390 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:29:39,391 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [358114992] [2021-11-19 04:29:39,391 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 04:29:39,391 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:29:39,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1a6c31-b817-4b9c-a5c0-95755494fb5a/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:29:39,392 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1a6c31-b817-4b9c-a5c0-95755494fb5a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:29:39,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1a6c31-b817-4b9c-a5c0-95755494fb5a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-19 04:29:39,547 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 04:29:39,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:29:39,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 04:29:39,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:29:39,837 INFO L134 CoverageAnalysis]: Checked inductivity of 1766 backedges. 79 proven. 7 refuted. 0 times theorem prover too weak. 1680 trivial. 0 not checked. [2021-11-19 04:29:39,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:29:40,126 INFO L134 CoverageAnalysis]: Checked inductivity of 1766 backedges. 79 proven. 7 refuted. 0 times theorem prover too weak. 1680 trivial. 0 not checked. [2021-11-19 04:29:40,126 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:29:40,127 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378476240] [2021-11-19 04:29:40,127 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 04:29:40,127 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358114992] [2021-11-19 04:29:40,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358114992] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:29:40,127 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:29:40,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-11-19 04:29:40,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077311328] [2021-11-19 04:29:40,128 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 04:29:40,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 04:29:40,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:29:40,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 04:29:40,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-19 04:29:40,131 INFO L87 Difference]: Start difference. First operand 117 states and 123 transitions. Second operand has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-19 04:29:40,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:29:40,170 INFO L93 Difference]: Finished difference Result 161 states and 178 transitions. [2021-11-19 04:29:40,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 04:29:40,171 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 144 [2021-11-19 04:29:40,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:29:40,173 INFO L225 Difference]: With dead ends: 161 [2021-11-19 04:29:40,173 INFO L226 Difference]: Without dead ends: 129 [2021-11-19 04:29:40,174 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 280 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-19 04:29:40,175 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 9 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:29:40,176 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 99 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 04:29:40,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-11-19 04:29:40,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2021-11-19 04:29:40,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 124 states have (on average 1.0403225806451613) internal successors, (129), 124 states have internal predecessors, (129), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-19 04:29:40,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 135 transitions. [2021-11-19 04:29:40,189 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 135 transitions. Word has length 144 [2021-11-19 04:29:40,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:29:40,190 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 135 transitions. [2021-11-19 04:29:40,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-19 04:29:40,191 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 135 transitions. [2021-11-19 04:29:40,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-11-19 04:29:40,194 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:29:40,194 INFO L514 BasicCegarLoop]: trace histogram [40, 40, 21, 21, 18, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:29:40,236 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1a6c31-b817-4b9c-a5c0-95755494fb5a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-19 04:29:40,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1a6c31-b817-4b9c-a5c0-95755494fb5a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:29:40,400 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:29:40,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:29:40,401 INFO L85 PathProgramCache]: Analyzing trace with hash -2049059016, now seen corresponding path program 5 times [2021-11-19 04:29:40,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:29:40,401 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720750421] [2021-11-19 04:29:40,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:29:40,401 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:29:40,479 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:29:40,485 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1041992111] [2021-11-19 04:29:40,489 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-19 04:29:40,489 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:29:40,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1a6c31-b817-4b9c-a5c0-95755494fb5a/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:29:40,491 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1a6c31-b817-4b9c-a5c0-95755494fb5a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:29:40,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1a6c31-b817-4b9c-a5c0-95755494fb5a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-19 04:29:41,439 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 29 check-sat command(s) [2021-11-19 04:29:41,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:29:41,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 04:29:41,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:29:41,819 INFO L134 CoverageAnalysis]: Checked inductivity of 2324 backedges. 354 proven. 2 refuted. 0 times theorem prover too weak. 1968 trivial. 0 not checked. [2021-11-19 04:29:41,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:29:42,132 INFO L134 CoverageAnalysis]: Checked inductivity of 2324 backedges. 28 proven. 82 refuted. 0 times theorem prover too weak. 2214 trivial. 0 not checked. [2021-11-19 04:29:42,133 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:29:42,133 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720750421] [2021-11-19 04:29:42,133 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 04:29:42,133 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041992111] [2021-11-19 04:29:42,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041992111] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:29:42,134 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:29:42,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-11-19 04:29:42,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547370966] [2021-11-19 04:29:42,135 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 04:29:42,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 04:29:42,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:29:42,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 04:29:42,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-19 04:29:42,137 INFO L87 Difference]: Start difference. First operand 129 states and 135 transitions. Second operand has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-19 04:29:42,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:29:42,192 INFO L93 Difference]: Finished difference Result 185 states and 206 transitions. [2021-11-19 04:29:42,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 04:29:42,193 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 180 [2021-11-19 04:29:42,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:29:42,196 INFO L225 Difference]: With dead ends: 185 [2021-11-19 04:29:42,196 INFO L226 Difference]: Without dead ends: 141 [2021-11-19 04:29:42,198 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 352 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-19 04:29:42,199 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 13 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:29:42,200 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 122 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 04:29:42,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-11-19 04:29:42,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2021-11-19 04:29:42,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 136 states have (on average 1.0661764705882353) internal successors, (145), 136 states have internal predecessors, (145), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-19 04:29:42,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 151 transitions. [2021-11-19 04:29:42,220 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 151 transitions. Word has length 180 [2021-11-19 04:29:42,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:29:42,221 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 151 transitions. [2021-11-19 04:29:42,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-19 04:29:42,221 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 151 transitions. [2021-11-19 04:29:42,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2021-11-19 04:29:42,225 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:29:42,225 INFO L514 BasicCegarLoop]: trace histogram [40, 40, 33, 33, 18, 15, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:29:42,277 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1a6c31-b817-4b9c-a5c0-95755494fb5a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-19 04:29:42,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1a6c31-b817-4b9c-a5c0-95755494fb5a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-19 04:29:42,433 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:29:42,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:29:42,434 INFO L85 PathProgramCache]: Analyzing trace with hash -990357256, now seen corresponding path program 6 times [2021-11-19 04:29:42,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:29:42,434 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878645730] [2021-11-19 04:29:42,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:29:42,434 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:29:42,472 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:29:42,472 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1628558050] [2021-11-19 04:29:42,472 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-19 04:29:42,473 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:29:42,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1a6c31-b817-4b9c-a5c0-95755494fb5a/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:29:42,474 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1a6c31-b817-4b9c-a5c0-95755494fb5a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:29:42,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1a6c31-b817-4b9c-a5c0-95755494fb5a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-19 04:29:43,211 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-11-19 04:29:43,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:29:43,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 04:29:43,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:29:43,711 INFO L134 CoverageAnalysis]: Checked inductivity of 3314 backedges. 780 proven. 16 refuted. 0 times theorem prover too weak. 2518 trivial. 0 not checked. [2021-11-19 04:29:43,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:29:44,184 INFO L134 CoverageAnalysis]: Checked inductivity of 3314 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3298 trivial. 0 not checked. [2021-11-19 04:29:44,184 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:29:44,184 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878645730] [2021-11-19 04:29:44,185 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 04:29:44,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628558050] [2021-11-19 04:29:44,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628558050] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:29:44,185 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:29:44,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-11-19 04:29:44,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772436588] [2021-11-19 04:29:44,186 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 04:29:44,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 04:29:44,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:29:44,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 04:29:44,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-11-19 04:29:44,189 INFO L87 Difference]: Start difference. First operand 141 states and 151 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-19 04:29:44,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:29:44,243 INFO L93 Difference]: Finished difference Result 197 states and 219 transitions. [2021-11-19 04:29:44,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-19 04:29:44,244 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 216 [2021-11-19 04:29:44,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:29:44,246 INFO L225 Difference]: With dead ends: 197 [2021-11-19 04:29:44,246 INFO L226 Difference]: Without dead ends: 153 [2021-11-19 04:29:44,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 430 GetRequests, 420 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-11-19 04:29:44,248 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 15 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:29:44,249 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 53 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 04:29:44,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-11-19 04:29:44,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2021-11-19 04:29:44,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 148 states have (on average 1.0608108108108107) internal successors, (157), 148 states have internal predecessors, (157), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-19 04:29:44,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 163 transitions. [2021-11-19 04:29:44,260 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 163 transitions. Word has length 216 [2021-11-19 04:29:44,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:29:44,260 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 163 transitions. [2021-11-19 04:29:44,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-19 04:29:44,261 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 163 transitions. [2021-11-19 04:29:44,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2021-11-19 04:29:44,265 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:29:44,265 INFO L514 BasicCegarLoop]: trace histogram [40, 40, 33, 33, 18, 15, 10, 10, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:29:44,309 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1a6c31-b817-4b9c-a5c0-95755494fb5a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-19 04:29:44,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1a6c31-b817-4b9c-a5c0-95755494fb5a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-19 04:29:44,485 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:29:44,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:29:44,486 INFO L85 PathProgramCache]: Analyzing trace with hash 597438212, now seen corresponding path program 7 times [2021-11-19 04:29:44,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:29:44,486 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743277826] [2021-11-19 04:29:44,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:29:44,487 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:29:44,527 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:29:44,528 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [670300922] [2021-11-19 04:29:44,528 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-19 04:29:44,528 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:29:44,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1a6c31-b817-4b9c-a5c0-95755494fb5a/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:29:44,530 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1a6c31-b817-4b9c-a5c0-95755494fb5a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:29:44,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1a6c31-b817-4b9c-a5c0-95755494fb5a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-19 04:29:44,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:29:44,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 605 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 04:29:44,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:29:45,266 INFO L134 CoverageAnalysis]: Checked inductivity of 3398 backedges. 549 proven. 57 refuted. 0 times theorem prover too weak. 2792 trivial. 0 not checked. [2021-11-19 04:29:45,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:29:45,735 INFO L134 CoverageAnalysis]: Checked inductivity of 3398 backedges. 93 proven. 835 refuted. 0 times theorem prover too weak. 2470 trivial. 0 not checked. [2021-11-19 04:29:45,735 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:29:45,735 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743277826] [2021-11-19 04:29:45,736 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 04:29:45,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670300922] [2021-11-19 04:29:45,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670300922] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:29:45,736 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:29:45,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-11-19 04:29:45,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865340965] [2021-11-19 04:29:45,736 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 04:29:45,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-19 04:29:45,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:29:45,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-19 04:29:45,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-11-19 04:29:45,738 INFO L87 Difference]: Start difference. First operand 153 states and 163 transitions. Second operand has 16 states, 16 states have (on average 4.5625) internal successors, (73), 16 states have internal predecessors, (73), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-19 04:29:45,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:29:45,822 INFO L93 Difference]: Finished difference Result 245 states and 274 transitions. [2021-11-19 04:29:45,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-19 04:29:45,823 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.5625) internal successors, (73), 16 states have internal predecessors, (73), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 228 [2021-11-19 04:29:45,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:29:45,829 INFO L225 Difference]: With dead ends: 245 [2021-11-19 04:29:45,830 INFO L226 Difference]: Without dead ends: 177 [2021-11-19 04:29:45,831 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 454 GetRequests, 440 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-11-19 04:29:45,832 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 14 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:29:45,833 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 99 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:29:45,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-11-19 04:29:45,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2021-11-19 04:29:45,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 172 states have (on average 1.052325581395349) internal successors, (181), 172 states have internal predecessors, (181), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-19 04:29:45,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 187 transitions. [2021-11-19 04:29:45,846 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 187 transitions. Word has length 228 [2021-11-19 04:29:45,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:29:45,847 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 187 transitions. [2021-11-19 04:29:45,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.5625) internal successors, (73), 16 states have internal predecessors, (73), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-19 04:29:45,847 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 187 transitions. [2021-11-19 04:29:45,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2021-11-19 04:29:45,853 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:29:45,853 INFO L514 BasicCegarLoop]: trace histogram [57, 57, 42, 40, 40, 15, 10, 10, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:29:45,894 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1a6c31-b817-4b9c-a5c0-95755494fb5a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-19 04:29:46,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1a6c31-b817-4b9c-a5c0-95755494fb5a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:29:46,069 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:29:46,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:29:46,070 INFO L85 PathProgramCache]: Analyzing trace with hash -254065276, now seen corresponding path program 8 times [2021-11-19 04:29:46,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:29:46,070 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169513519] [2021-11-19 04:29:46,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:29:46,071 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:29:46,121 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:29:46,122 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [3344252] [2021-11-19 04:29:46,122 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 04:29:46,122 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:29:46,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1a6c31-b817-4b9c-a5c0-95755494fb5a/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:29:46,124 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1a6c31-b817-4b9c-a5c0-95755494fb5a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:29:46,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1a6c31-b817-4b9c-a5c0-95755494fb5a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-19 04:29:46,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 04:29:46,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:29:46,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 701 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-19 04:29:46,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:29:47,038 INFO L134 CoverageAnalysis]: Checked inductivity of 6674 backedges. 1909 proven. 301 refuted. 0 times theorem prover too weak. 4464 trivial. 0 not checked. [2021-11-19 04:29:47,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:29:47,704 INFO L134 CoverageAnalysis]: Checked inductivity of 6674 backedges. 205 proven. 2551 refuted. 0 times theorem prover too weak. 3918 trivial. 0 not checked. [2021-11-19 04:29:47,704 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:29:47,704 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169513519] [2021-11-19 04:29:47,705 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 04:29:47,705 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3344252] [2021-11-19 04:29:47,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3344252] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:29:47,705 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:29:47,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 23 [2021-11-19 04:29:47,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789111942] [2021-11-19 04:29:47,706 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 04:29:47,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-19 04:29:47,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:29:47,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-19 04:29:47,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-11-19 04:29:47,708 INFO L87 Difference]: Start difference. First operand 177 states and 187 transitions. Second operand has 23 states, 23 states have (on average 4.173913043478261) internal successors, (96), 23 states have internal predecessors, (96), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-19 04:29:47,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:29:47,827 INFO L93 Difference]: Finished difference Result 290 states and 318 transitions. [2021-11-19 04:29:47,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-19 04:29:47,828 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.173913043478261) internal successors, (96), 23 states have internal predecessors, (96), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 300 [2021-11-19 04:29:47,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:29:47,830 INFO L225 Difference]: With dead ends: 290 [2021-11-19 04:29:47,830 INFO L226 Difference]: Without dead ends: 198 [2021-11-19 04:29:47,832 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 598 GetRequests, 577 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-11-19 04:29:47,833 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 21 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:29:47,833 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 195 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:29:47,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-11-19 04:29:47,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2021-11-19 04:29:47,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 193 states have (on average 1.0466321243523315) internal successors, (202), 193 states have internal predecessors, (202), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-19 04:29:47,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 208 transitions. [2021-11-19 04:29:47,845 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 208 transitions. Word has length 300 [2021-11-19 04:29:47,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:29:47,846 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 208 transitions. [2021-11-19 04:29:47,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.173913043478261) internal successors, (96), 23 states have internal predecessors, (96), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-19 04:29:47,847 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 208 transitions. [2021-11-19 04:29:47,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2021-11-19 04:29:47,854 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:29:47,855 INFO L514 BasicCegarLoop]: trace histogram [78, 78, 63, 40, 40, 15, 10, 10, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:29:47,899 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1a6c31-b817-4b9c-a5c0-95755494fb5a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-19 04:29:48,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1a6c31-b817-4b9c-a5c0-95755494fb5a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:29:48,081 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:29:48,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:29:48,082 INFO L85 PathProgramCache]: Analyzing trace with hash 209485073, now seen corresponding path program 9 times [2021-11-19 04:29:48,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:29:48,082 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146034192] [2021-11-19 04:29:48,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:29:48,083 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:29:48,123 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:29:48,123 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1304842275] [2021-11-19 04:29:48,123 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 04:29:48,124 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:29:48,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1a6c31-b817-4b9c-a5c0-95755494fb5a/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:29:48,125 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1a6c31-b817-4b9c-a5c0-95755494fb5a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:29:48,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1a6c31-b817-4b9c-a5c0-95755494fb5a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-19 04:29:49,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-11-19 04:29:49,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:29:49,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 04:29:49,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:29:49,803 INFO L134 CoverageAnalysis]: Checked inductivity of 10958 backedges. 1253 proven. 40 refuted. 0 times theorem prover too weak. 9665 trivial. 0 not checked. [2021-11-19 04:29:49,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:29:50,528 INFO L134 CoverageAnalysis]: Checked inductivity of 10958 backedges. 1253 proven. 40 refuted. 0 times theorem prover too weak. 9665 trivial. 0 not checked. [2021-11-19 04:29:50,528 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:29:50,528 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146034192] [2021-11-19 04:29:50,528 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 04:29:50,528 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304842275] [2021-11-19 04:29:50,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304842275] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:29:50,529 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:29:50,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-11-19 04:29:50,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882225086] [2021-11-19 04:29:50,529 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 04:29:50,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-19 04:29:50,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:29:50,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-19 04:29:50,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-11-19 04:29:50,531 INFO L87 Difference]: Start difference. First operand 198 states and 208 transitions. Second operand has 16 states, 16 states have (on average 3.8125) internal successors, (61), 16 states have internal predecessors, (61), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-19 04:29:50,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:29:50,652 INFO L93 Difference]: Finished difference Result 335 states and 372 transitions. [2021-11-19 04:29:50,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-19 04:29:50,653 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 16 states have internal predecessors, (61), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 363 [2021-11-19 04:29:50,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:29:50,659 INFO L225 Difference]: With dead ends: 335 [2021-11-19 04:29:50,659 INFO L226 Difference]: Without dead ends: 222 [2021-11-19 04:29:50,662 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 724 GetRequests, 710 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-11-19 04:29:50,665 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 44 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:29:50,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 98 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:29:50,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-11-19 04:29:50,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 222. [2021-11-19 04:29:50,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 217 states have (on average 1.0783410138248848) internal successors, (234), 217 states have internal predecessors, (234), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-19 04:29:50,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 240 transitions. [2021-11-19 04:29:50,682 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 240 transitions. Word has length 363 [2021-11-19 04:29:50,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:29:50,683 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 240 transitions. [2021-11-19 04:29:50,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 16 states have internal predecessors, (61), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-19 04:29:50,684 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 240 transitions. [2021-11-19 04:29:50,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 436 [2021-11-19 04:29:50,694 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:29:50,694 INFO L514 BasicCegarLoop]: trace histogram [102, 102, 63, 40, 40, 39, 10, 10, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:29:50,745 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1a6c31-b817-4b9c-a5c0-95755494fb5a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-19 04:29:50,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1a6c31-b817-4b9c-a5c0-95755494fb5a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:29:50,913 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:29:50,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:29:50,913 INFO L85 PathProgramCache]: Analyzing trace with hash 1936875921, now seen corresponding path program 10 times [2021-11-19 04:29:50,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:29:50,913 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538335356] [2021-11-19 04:29:50,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:29:50,914 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:29:50,965 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:29:50,965 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [88018620] [2021-11-19 04:29:50,966 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 04:29:50,966 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:29:50,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1a6c31-b817-4b9c-a5c0-95755494fb5a/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:29:50,982 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1a6c31-b817-4b9c-a5c0-95755494fb5a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:29:51,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1a6c31-b817-4b9c-a5c0-95755494fb5a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-19 04:29:51,240 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 04:29:51,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:29:51,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 977 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-19 04:29:51,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:29:52,913 INFO L134 CoverageAnalysis]: Checked inductivity of 17474 backedges. 10619 proven. 1717 refuted. 0 times theorem prover too weak. 5138 trivial. 0 not checked. [2021-11-19 04:29:52,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:29:54,127 INFO L134 CoverageAnalysis]: Checked inductivity of 17474 backedges. 3540 proven. 5257 refuted. 0 times theorem prover too weak. 8677 trivial. 0 not checked. [2021-11-19 04:29:54,127 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:29:54,127 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538335356] [2021-11-19 04:29:54,128 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 04:29:54,128 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88018620] [2021-11-19 04:29:54,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88018620] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:29:54,128 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:29:54,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 42 [2021-11-19 04:29:54,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812443892] [2021-11-19 04:29:54,129 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 04:29:54,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-19 04:29:54,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:29:54,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-19 04:29:54,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-11-19 04:29:54,131 INFO L87 Difference]: Start difference. First operand 222 states and 240 transitions. Second operand has 42 states, 42 states have (on average 3.738095238095238) internal successors, (157), 42 states have internal predecessors, (157), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-19 04:29:54,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:29:54,408 INFO L93 Difference]: Finished difference Result 377 states and 426 transitions. [2021-11-19 04:29:54,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-19 04:29:54,408 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.738095238095238) internal successors, (157), 42 states have internal predecessors, (157), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 435 [2021-11-19 04:29:54,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:29:54,411 INFO L225 Difference]: With dead ends: 377 [2021-11-19 04:29:54,412 INFO L226 Difference]: Without dead ends: 240 [2021-11-19 04:29:54,414 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 868 GetRequests, 827 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-11-19 04:29:54,414 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 86 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:29:54,415 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 242 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 04:29:54,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-11-19 04:29:54,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 240. [2021-11-19 04:29:54,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 235 states have (on average 1.097872340425532) internal successors, (258), 235 states have internal predecessors, (258), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-19 04:29:54,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 264 transitions. [2021-11-19 04:29:54,429 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 264 transitions. Word has length 435 [2021-11-19 04:29:54,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:29:54,430 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 264 transitions. [2021-11-19 04:29:54,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.738095238095238) internal successors, (157), 42 states have internal predecessors, (157), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-19 04:29:54,431 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 264 transitions. [2021-11-19 04:29:54,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 490 [2021-11-19 04:29:54,436 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:29:54,436 INFO L514 BasicCegarLoop]: trace histogram [120, 120, 63, 57, 40, 40, 10, 10, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:29:54,468 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1a6c31-b817-4b9c-a5c0-95755494fb5a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-19 04:29:54,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1a6c31-b817-4b9c-a5c0-95755494fb5a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-19 04:29:54,649 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:29:54,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:29:54,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1806165775, now seen corresponding path program 11 times [2021-11-19 04:29:54,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:29:54,650 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253885196] [2021-11-19 04:29:54,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:29:54,651 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:29:54,697 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:29:54,698 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1448894652] [2021-11-19 04:29:54,698 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-19 04:29:54,698 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:29:54,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1a6c31-b817-4b9c-a5c0-95755494fb5a/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:29:54,700 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1a6c31-b817-4b9c-a5c0-95755494fb5a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:29:54,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1a6c31-b817-4b9c-a5c0-95755494fb5a/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process