./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 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434d1ba5-cd78-4d89-8048-868b7e02d5dc/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434d1ba5-cd78-4d89-8048-868b7e02d5dc/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434d1ba5-cd78-4d89-8048-868b7e02d5dc/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434d1ba5-cd78-4d89-8048-868b7e02d5dc/bin/uautomizer-ZsLfNo2U6R/config/AutomizerReach.xml -i ../../sv-benchmarks/c/reducercommutativity/rangesum40.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434d1ba5-cd78-4d89-8048-868b7e02d5dc/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434d1ba5-cd78-4d89-8048-868b7e02d5dc/bin/uautomizer-ZsLfNo2U6R --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 --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-25 17:17:04,125 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 17:17:04,128 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 17:17:04,175 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 17:17:04,176 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 17:17:04,177 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 17:17:04,179 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 17:17:04,181 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 17:17:04,183 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 17:17:04,184 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 17:17:04,186 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 17:17:04,187 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 17:17:04,188 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 17:17:04,189 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 17:17:04,190 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 17:17:04,192 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 17:17:04,193 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 17:17:04,195 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 17:17:04,197 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 17:17:04,215 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 17:17:04,217 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 17:17:04,219 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 17:17:04,220 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 17:17:04,222 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 17:17:04,226 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 17:17:04,226 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 17:17:04,227 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 17:17:04,228 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 17:17:04,229 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 17:17:04,230 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 17:17:04,231 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 17:17:04,232 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 17:17:04,233 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 17:17:04,234 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 17:17:04,235 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 17:17:04,236 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 17:17:04,237 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 17:17:04,237 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 17:17:04,238 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 17:17:04,239 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 17:17:04,240 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 17:17:04,241 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434d1ba5-cd78-4d89-8048-868b7e02d5dc/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-25 17:17:04,268 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 17:17:04,268 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 17:17:04,269 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 17:17:04,269 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 17:17:04,270 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 17:17:04,271 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 17:17:04,272 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 17:17:04,272 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 17:17:04,273 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 17:17:04,273 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 17:17:04,273 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 17:17:04,274 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 17:17:04,274 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 17:17:04,275 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 17:17:04,275 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 17:17:04,276 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 17:17:04,276 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 17:17:04,277 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 17:17:04,277 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 17:17:04,277 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 17:17:04,278 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 17:17:04,278 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 17:17:04,279 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 17:17:04,279 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 17:17:04,279 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:17:04,280 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 17:17:04,280 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 17:17:04,280 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 17:17:04,281 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 17:17:04,281 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 17:17:04,281 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 17:17:04,282 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 17:17:04,282 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 17:17:04,283 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 17:17:04,283 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_434d1ba5-cd78-4d89-8048-868b7e02d5dc/bin/uautomizer-ZsLfNo2U6R/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434d1ba5-cd78-4d89-8048-868b7e02d5dc/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a418834dbd1069728d4982a06f4275da717a1d93e3d5061fbbc21c5c3a319ddf [2022-11-25 17:17:04,668 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 17:17:04,709 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 17:17:04,713 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 17:17:04,715 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 17:17:04,715 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 17:17:04,717 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434d1ba5-cd78-4d89-8048-868b7e02d5dc/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/reducercommutativity/rangesum40.i [2022-11-25 17:17:08,354 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 17:17:08,602 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 17:17:08,603 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434d1ba5-cd78-4d89-8048-868b7e02d5dc/sv-benchmarks/c/reducercommutativity/rangesum40.i [2022-11-25 17:17:08,613 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434d1ba5-cd78-4d89-8048-868b7e02d5dc/bin/uautomizer-ZsLfNo2U6R/data/ae1729ccd/7f62bd76321d4bd399e947e487cb449e/FLAG852ec725d [2022-11-25 17:17:08,639 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434d1ba5-cd78-4d89-8048-868b7e02d5dc/bin/uautomizer-ZsLfNo2U6R/data/ae1729ccd/7f62bd76321d4bd399e947e487cb449e [2022-11-25 17:17:08,643 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 17:17:08,649 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 17:17:08,654 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 17:17:08,655 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 17:17:08,659 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 17:17:08,664 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:17:08" (1/1) ... [2022-11-25 17:17:08,665 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e44da4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:17:08, skipping insertion in model container [2022-11-25 17:17:08,665 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:17:08" (1/1) ... [2022-11-25 17:17:08,675 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 17:17:08,710 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 17:17:09,073 WARN L237 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_434d1ba5-cd78-4d89-8048-868b7e02d5dc/sv-benchmarks/c/reducercommutativity/rangesum40.i[1465,1478] [2022-11-25 17:17:09,086 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:17:09,100 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 17:17:09,131 WARN L237 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_434d1ba5-cd78-4d89-8048-868b7e02d5dc/sv-benchmarks/c/reducercommutativity/rangesum40.i[1465,1478] [2022-11-25 17:17:09,133 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:17:09,149 INFO L208 MainTranslator]: Completed translation [2022-11-25 17:17:09,150 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:17:09 WrapperNode [2022-11-25 17:17:09,150 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 17:17:09,151 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 17:17:09,151 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 17:17:09,152 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 17:17:09,159 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:17:09" (1/1) ... [2022-11-25 17:17:09,167 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:17:09" (1/1) ... [2022-11-25 17:17:09,191 INFO L138 Inliner]: procedures = 17, calls = 23, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 70 [2022-11-25 17:17:09,192 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 17:17:09,193 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 17:17:09,193 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 17:17:09,193 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 17:17:09,206 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:17:09" (1/1) ... [2022-11-25 17:17:09,206 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:17:09" (1/1) ... [2022-11-25 17:17:09,209 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:17:09" (1/1) ... [2022-11-25 17:17:09,209 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:17:09" (1/1) ... [2022-11-25 17:17:09,216 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:17:09" (1/1) ... [2022-11-25 17:17:09,221 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:17:09" (1/1) ... [2022-11-25 17:17:09,222 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:17:09" (1/1) ... [2022-11-25 17:17:09,224 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:17:09" (1/1) ... [2022-11-25 17:17:09,226 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 17:17:09,227 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 17:17:09,228 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 17:17:09,228 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 17:17:09,229 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:17:09" (1/1) ... [2022-11-25 17:17:09,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:17:09,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434d1ba5-cd78-4d89-8048-868b7e02d5dc/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:17:09,284 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434d1ba5-cd78-4d89-8048-868b7e02d5dc/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 17:17:09,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434d1ba5-cd78-4d89-8048-868b7e02d5dc/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 17:17:09,347 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 17:17:09,347 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 17:17:09,348 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 17:17:09,348 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 17:17:09,348 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 17:17:09,349 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 17:17:09,351 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 17:17:09,351 INFO L130 BoogieDeclarations]: Found specification of procedure rangesum [2022-11-25 17:17:09,352 INFO L138 BoogieDeclarations]: Found implementation of procedure rangesum [2022-11-25 17:17:09,352 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 17:17:09,479 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 17:17:09,482 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 17:17:09,733 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 17:17:09,741 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 17:17:09,755 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-25 17:17:09,758 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:17:09 BoogieIcfgContainer [2022-11-25 17:17:09,758 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 17:17:09,761 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 17:17:09,761 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 17:17:09,765 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 17:17:09,766 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 05:17:08" (1/3) ... [2022-11-25 17:17:09,767 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ab7738e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:17:09, skipping insertion in model container [2022-11-25 17:17:09,783 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:17:09" (2/3) ... [2022-11-25 17:17:09,784 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ab7738e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:17:09, skipping insertion in model container [2022-11-25 17:17:09,784 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:17:09" (3/3) ... [2022-11-25 17:17:09,786 INFO L112 eAbstractionObserver]: Analyzing ICFG rangesum40.i [2022-11-25 17:17:09,819 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 17:17:09,819 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 17:17:09,918 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:17:09,929 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2a4ab68e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:17:09,930 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-25 17:17:09,935 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) [2022-11-25 17:17:09,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-25 17:17:09,951 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:17:09,952 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:17:09,954 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:17:09,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:17:09,963 INFO L85 PathProgramCache]: Analyzing trace with hash -275565944, now seen corresponding path program 1 times [2022-11-25 17:17:09,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:17:09,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060706824] [2022-11-25 17:17:09,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:17:09,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:17:10,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:17:10,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:17:10,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060706824] [2022-11-25 17:17:10,210 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-25 17:17:10,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941482368] [2022-11-25 17:17:10,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:17:10,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:17:10,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434d1ba5-cd78-4d89-8048-868b7e02d5dc/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:17:10,214 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434d1ba5-cd78-4d89-8048-868b7e02d5dc/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:17:10,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434d1ba5-cd78-4d89-8048-868b7e02d5dc/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 17:17:10,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:17:10,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-25 17:17:10,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:17:10,435 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-25 17:17:10,436 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:17:10,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941482368] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:17:10,437 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:17:10,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:17:10,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577517106] [2022-11-25 17:17:10,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:17:10,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-25 17:17:10,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:17:10,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-25 17:17:10,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 17:17:10,499 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 2 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 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) [2022-11-25 17:17:10,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:17:10,527 INFO L93 Difference]: Finished difference Result 52 states and 73 transitions. [2022-11-25 17:17:10,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-25 17:17:10,529 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 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 29 [2022-11-25 17:17:10,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:17:10,536 INFO L225 Difference]: With dead ends: 52 [2022-11-25 17:17:10,537 INFO L226 Difference]: Without dead ends: 24 [2022-11-25 17:17:10,540 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 17:17:10,544 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 17:17:10,546 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 17:17:10,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-11-25 17:17:10,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-11-25 17:17:10,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 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) [2022-11-25 17:17:10,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2022-11-25 17:17:10,586 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 29 [2022-11-25 17:17:10,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:17:10,587 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2022-11-25 17:17:10,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 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) [2022-11-25 17:17:10,588 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2022-11-25 17:17:10,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-25 17:17:10,590 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:17:10,590 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:17:10,596 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434d1ba5-cd78-4d89-8048-868b7e02d5dc/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 17:17:10,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434d1ba5-cd78-4d89-8048-868b7e02d5dc/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-25 17:17:10,796 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:17:10,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:17:10,797 INFO L85 PathProgramCache]: Analyzing trace with hash 1257002967, now seen corresponding path program 1 times [2022-11-25 17:17:10,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:17:10,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262743581] [2022-11-25 17:17:10,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:17:10,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:17:10,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:17:10,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:17:10,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262743581] [2022-11-25 17:17:10,830 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-25 17:17:10,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927186603] [2022-11-25 17:17:10,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:17:10,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:17:10,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434d1ba5-cd78-4d89-8048-868b7e02d5dc/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:17:10,833 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434d1ba5-cd78-4d89-8048-868b7e02d5dc/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:17:10,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434d1ba5-cd78-4d89-8048-868b7e02d5dc/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 17:17:10,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:17:10,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-25 17:17:10,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:17:10,990 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-25 17:17:10,991 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:17:10,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927186603] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:17:10,992 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:17:10,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:17:10,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685488032] [2022-11-25 17:17:10,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:17:10,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:17:10,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:17:10,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:17:10,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:17:10,997 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. 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) [2022-11-25 17:17:11,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:17:11,020 INFO L93 Difference]: Finished difference Result 46 states and 58 transitions. [2022-11-25 17:17:11,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:17:11,021 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 [2022-11-25 17:17:11,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:17:11,022 INFO L225 Difference]: With dead ends: 46 [2022-11-25 17:17:11,022 INFO L226 Difference]: Without dead ends: 26 [2022-11-25 17:17:11,023 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:17:11,024 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 1 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 54 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 [2022-11-25 17:17:11,025 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 54 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 17:17:11,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-11-25 17:17:11,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2022-11-25 17:17:11,031 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) [2022-11-25 17:17:11,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2022-11-25 17:17:11,033 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 29 [2022-11-25 17:17:11,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:17:11,033 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2022-11-25 17:17:11,034 INFO L496 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) [2022-11-25 17:17:11,034 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2022-11-25 17:17:11,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-25 17:17:11,035 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:17:11,035 INFO L195 NwaCegarLoop]: 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] [2022-11-25 17:17:11,048 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434d1ba5-cd78-4d89-8048-868b7e02d5dc/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 17:17:11,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434d1ba5-cd78-4d89-8048-868b7e02d5dc/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:17:11,242 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:17:11,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:17:11,242 INFO L85 PathProgramCache]: Analyzing trace with hash -653100523, now seen corresponding path program 1 times [2022-11-25 17:17:11,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:17:11,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022112538] [2022-11-25 17:17:11,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:17:11,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:17:11,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:17:11,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:17:11,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022112538] [2022-11-25 17:17:11,302 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-25 17:17:11,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869900154] [2022-11-25 17:17:11,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:17:11,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:17:11,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434d1ba5-cd78-4d89-8048-868b7e02d5dc/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:17:11,308 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434d1ba5-cd78-4d89-8048-868b7e02d5dc/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:17:11,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434d1ba5-cd78-4d89-8048-868b7e02d5dc/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 17:17:11,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:17:11,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-25 17:17:11,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:17:11,466 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-25 17:17:11,466 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:17:11,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869900154] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:17:11,467 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:17:11,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:17:11,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913615463] [2022-11-25 17:17:11,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:17:11,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:17:11,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:17:11,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:17:11,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:17:11,470 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) [2022-11-25 17:17:11,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:17:11,492 INFO L93 Difference]: Finished difference Result 46 states and 61 transitions. [2022-11-25 17:17:11,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:17:11,493 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 [2022-11-25 17:17:11,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:17:11,494 INFO L225 Difference]: With dead ends: 46 [2022-11-25 17:17:11,495 INFO L226 Difference]: Without dead ends: 28 [2022-11-25 17:17:11,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:17:11,497 INFO L413 NwaCegarLoop]: 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 [2022-11-25 17:17:11,498 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 51 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 17:17:11,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-11-25 17:17:11,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2022-11-25 17:17:11,504 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) [2022-11-25 17:17:11,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2022-11-25 17:17:11,506 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 31 [2022-11-25 17:17:11,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:17:11,507 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2022-11-25 17:17:11,507 INFO L496 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) [2022-11-25 17:17:11,507 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2022-11-25 17:17:11,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-25 17:17:11,509 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:17:11,509 INFO L195 NwaCegarLoop]: 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] [2022-11-25 17:17:11,525 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434d1ba5-cd78-4d89-8048-868b7e02d5dc/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-25 17:17:11,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434d1ba5-cd78-4d89-8048-868b7e02d5dc/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:17:11,716 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:17:11,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:17:11,717 INFO L85 PathProgramCache]: Analyzing trace with hash -1081404920, now seen corresponding path program 1 times [2022-11-25 17:17:11,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:17:11,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354879478] [2022-11-25 17:17:11,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:17:11,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:17:11,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:17:11,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:17:11,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354879478] [2022-11-25 17:17:11,802 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-25 17:17:11,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102999442] [2022-11-25 17:17:11,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:17:11,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:17:11,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434d1ba5-cd78-4d89-8048-868b7e02d5dc/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:17:11,808 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434d1ba5-cd78-4d89-8048-868b7e02d5dc/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:17:11,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434d1ba5-cd78-4d89-8048-868b7e02d5dc/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 17:17:11,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:17:11,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-25 17:17:11,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:17:11,992 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-25 17:17:12,002 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:17:12,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102999442] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:17:12,003 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:17:12,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:17:12,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498812688] [2022-11-25 17:17:12,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:17:12,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:17:12,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:17:12,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:17:12,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:17:12,006 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) [2022-11-25 17:17:12,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:17:12,038 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2022-11-25 17:17:12,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:17:12,040 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 [2022-11-25 17:17:12,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:17:12,042 INFO L225 Difference]: With dead ends: 44 [2022-11-25 17:17:12,045 INFO L226 Difference]: Without dead ends: 29 [2022-11-25 17:17:12,046 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:17:12,047 INFO L413 NwaCegarLoop]: 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 [2022-11-25 17:17:12,051 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 53 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 17:17:12,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-11-25 17:17:12,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2022-11-25 17:17:12,057 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) [2022-11-25 17:17:12,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2022-11-25 17:17:12,062 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 40 [2022-11-25 17:17:12,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:17:12,064 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2022-11-25 17:17:12,065 INFO L496 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) [2022-11-25 17:17:12,065 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2022-11-25 17:17:12,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-25 17:17:12,066 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:17:12,067 INFO L195 NwaCegarLoop]: 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] [2022-11-25 17:17:12,074 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434d1ba5-cd78-4d89-8048-868b7e02d5dc/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 17:17:12,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434d1ba5-cd78-4d89-8048-868b7e02d5dc/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:17:12,274 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:17:12,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:17:12,274 INFO L85 PathProgramCache]: Analyzing trace with hash -673301430, now seen corresponding path program 1 times [2022-11-25 17:17:12,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:17:12,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132444773] [2022-11-25 17:17:12,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:17:12,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:17:12,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:17:12,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:17:12,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132444773] [2022-11-25 17:17:12,332 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-25 17:17:12,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196888453] [2022-11-25 17:17:12,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:17:12,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:17:12,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434d1ba5-cd78-4d89-8048-868b7e02d5dc/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:17:12,348 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434d1ba5-cd78-4d89-8048-868b7e02d5dc/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:17:12,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434d1ba5-cd78-4d89-8048-868b7e02d5dc/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 17:17:12,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:17:12,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 17:17:12,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:17:12,527 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-25 17:17:12,540 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:17:12,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196888453] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:17:12,540 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:17:12,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:17:12,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537572039] [2022-11-25 17:17:12,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:17:12,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:17:12,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:17:12,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:17:12,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:17:12,543 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) [2022-11-25 17:17:12,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:17:12,566 INFO L93 Difference]: Finished difference Result 55 states and 73 transitions. [2022-11-25 17:17:12,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:17:12,567 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 [2022-11-25 17:17:12,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:17:12,570 INFO L225 Difference]: With dead ends: 55 [2022-11-25 17:17:12,570 INFO L226 Difference]: Without dead ends: 34 [2022-11-25 17:17:12,570 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:17:12,572 INFO L413 NwaCegarLoop]: 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 [2022-11-25 17:17:12,572 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 54 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 17:17:12,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-11-25 17:17:12,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2022-11-25 17:17:12,579 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) [2022-11-25 17:17:12,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2022-11-25 17:17:12,581 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 42 [2022-11-25 17:17:12,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:17:12,582 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2022-11-25 17:17:12,582 INFO L496 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) [2022-11-25 17:17:12,582 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2022-11-25 17:17:12,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-25 17:17:12,584 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:17:12,584 INFO L195 NwaCegarLoop]: 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] [2022-11-25 17:17:12,597 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434d1ba5-cd78-4d89-8048-868b7e02d5dc/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 17:17:12,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434d1ba5-cd78-4d89-8048-868b7e02d5dc/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:17:12,791 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:17:12,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:17:12,792 INFO L85 PathProgramCache]: Analyzing trace with hash -1042180377, now seen corresponding path program 1 times [2022-11-25 17:17:12,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:17:12,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140869314] [2022-11-25 17:17:12,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:17:12,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:17:12,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:17:13,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-25 17:17:13,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:17:13,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-25 17:17:13,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:17:13,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-11-25 17:17:13,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:17:13,126 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-25 17:17:13,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:17:13,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140869314] [2022-11-25 17:17:13,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140869314] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:17:13,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140367440] [2022-11-25 17:17:13,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:17:13,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:17:13,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434d1ba5-cd78-4d89-8048-868b7e02d5dc/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:17:13,133 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434d1ba5-cd78-4d89-8048-868b7e02d5dc/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:17:13,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434d1ba5-cd78-4d89-8048-868b7e02d5dc/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 17:17:13,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:17:13,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 17:17:13,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:17:13,293 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-25 17:17:13,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:17:13,346 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-25 17:17:13,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140367440] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:17:13,348 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:17:13,348 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2022-11-25 17:17:13,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318395921] [2022-11-25 17:17:13,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:17:13,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 17:17:13,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:17:13,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 17:17:13,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-11-25 17:17:13,355 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) [2022-11-25 17:17:13,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:17:13,443 INFO L93 Difference]: Finished difference Result 69 states and 92 transitions. [2022-11-25 17:17:13,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 17:17:13,446 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 [2022-11-25 17:17:13,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:17:13,449 INFO L225 Difference]: With dead ends: 69 [2022-11-25 17:17:13,452 INFO L226 Difference]: Without dead ends: 42 [2022-11-25 17:17:13,453 INFO L412 NwaCegarLoop]: 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 [2022-11-25 17:17:13,456 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 4 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 17:17:13,457 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 70 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 17:17:13,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-11-25 17:17:13,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2022-11-25 17:17:13,466 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) [2022-11-25 17:17:13,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2022-11-25 17:17:13,468 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 42 [2022-11-25 17:17:13,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:17:13,468 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2022-11-25 17:17:13,468 INFO L496 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) [2022-11-25 17:17:13,469 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2022-11-25 17:17:13,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-25 17:17:13,470 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:17:13,471 INFO L195 NwaCegarLoop]: 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] [2022-11-25 17:17:13,488 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434d1ba5-cd78-4d89-8048-868b7e02d5dc/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 17:17:13,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434d1ba5-cd78-4d89-8048-868b7e02d5dc/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:17:13,689 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:17:13,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:17:13,689 INFO L85 PathProgramCache]: Analyzing trace with hash -604386836, now seen corresponding path program 2 times [2022-11-25 17:17:13,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:17:13,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804888028] [2022-11-25 17:17:13,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:17:13,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:17:13,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:17:13,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-25 17:17:13,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:17:13,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-11-25 17:17:13,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:17:13,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-11-25 17:17:13,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:17:13,824 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-11-25 17:17:13,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:17:13,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804888028] [2022-11-25 17:17:13,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804888028] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:17:13,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807487945] [2022-11-25 17:17:13,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:17:13,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:17:13,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434d1ba5-cd78-4d89-8048-868b7e02d5dc/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:17:13,833 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434d1ba5-cd78-4d89-8048-868b7e02d5dc/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:17:13,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434d1ba5-cd78-4d89-8048-868b7e02d5dc/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 17:17:13,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:17:13,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:17:13,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 17:17:13,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:17:14,060 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-11-25 17:17:14,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:17:14,180 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-11-25 17:17:14,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807487945] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:17:14,180 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:17:14,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2022-11-25 17:17:14,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925433711] [2022-11-25 17:17:14,181 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:17:14,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-25 17:17:14,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:17:14,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-25 17:17:14,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-11-25 17:17:14,187 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) [2022-11-25 17:17:14,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:17:14,283 INFO L93 Difference]: Finished difference Result 86 states and 112 transitions. [2022-11-25 17:17:14,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-25 17:17:14,284 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 [2022-11-25 17:17:14,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:17:14,288 INFO L225 Difference]: With dead ends: 86 [2022-11-25 17:17:14,289 INFO L226 Difference]: Without dead ends: 56 [2022-11-25 17:17:14,292 INFO L412 NwaCegarLoop]: 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 [2022-11-25 17:17:14,296 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 6 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 17:17:14,298 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 112 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 17:17:14,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-11-25 17:17:14,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 51. [2022-11-25 17:17:14,314 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) [2022-11-25 17:17:14,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2022-11-25 17:17:14,317 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 57 [2022-11-25 17:17:14,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:17:14,318 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2022-11-25 17:17:14,318 INFO L496 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) [2022-11-25 17:17:14,318 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2022-11-25 17:17:14,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-25 17:17:14,321 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:17:14,322 INFO L195 NwaCegarLoop]: 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] [2022-11-25 17:17:14,328 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434d1ba5-cd78-4d89-8048-868b7e02d5dc/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-25 17:17:14,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434d1ba5-cd78-4d89-8048-868b7e02d5dc/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:17:14,527 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:17:14,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:17:14,528 INFO L85 PathProgramCache]: Analyzing trace with hash 948362870, now seen corresponding path program 1 times [2022-11-25 17:17:14,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:17:14,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441267600] [2022-11-25 17:17:14,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:17:14,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:17:14,559 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 17:17:14,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1935178777] [2022-11-25 17:17:14,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:17:14,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:17:14,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434d1ba5-cd78-4d89-8048-868b7e02d5dc/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:17:14,561 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434d1ba5-cd78-4d89-8048-868b7e02d5dc/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:17:14,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434d1ba5-cd78-4d89-8048-868b7e02d5dc/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 17:17:14,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:17:14,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-25 17:17:14,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:17:14,883 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2022-11-25 17:17:14,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:17:15,228 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2022-11-25 17:17:15,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:17:15,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441267600] [2022-11-25 17:17:15,228 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 17:17:15,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935178777] [2022-11-25 17:17:15,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935178777] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:17:15,229 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:17:15,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2022-11-25 17:17:15,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556871557] [2022-11-25 17:17:15,229 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:17:15,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-25 17:17:15,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:17:15,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-25 17:17:15,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2022-11-25 17:17:15,231 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) [2022-11-25 17:17:15,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:17:15,351 INFO L93 Difference]: Finished difference Result 103 states and 126 transitions. [2022-11-25 17:17:15,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-25 17:17:15,354 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 [2022-11-25 17:17:15,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:17:15,355 INFO L225 Difference]: With dead ends: 103 [2022-11-25 17:17:15,356 INFO L226 Difference]: Without dead ends: 75 [2022-11-25 17:17:15,358 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2022-11-25 17:17:15,360 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 2 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 17:17:15,360 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 106 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 17:17:15,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-11-25 17:17:15,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2022-11-25 17:17:15,381 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) [2022-11-25 17:17:15,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 81 transitions. [2022-11-25 17:17:15,385 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 81 transitions. Word has length 78 [2022-11-25 17:17:15,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:17:15,388 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 81 transitions. [2022-11-25 17:17:15,388 INFO L496 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) [2022-11-25 17:17:15,388 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 81 transitions. [2022-11-25 17:17:15,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-25 17:17:15,394 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:17:15,398 INFO L195 NwaCegarLoop]: 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] [2022-11-25 17:17:15,405 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434d1ba5-cd78-4d89-8048-868b7e02d5dc/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-11-25 17:17:15,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434d1ba5-cd78-4d89-8048-868b7e02d5dc/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:17:15,605 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:17:15,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:17:15,606 INFO L85 PathProgramCache]: Analyzing trace with hash 468172686, now seen corresponding path program 2 times [2022-11-25 17:17:15,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:17:15,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668849431] [2022-11-25 17:17:15,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:17:15,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:17:15,675 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 17:17:15,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1746330922] [2022-11-25 17:17:15,676 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:17:15,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:17:15,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434d1ba5-cd78-4d89-8048-868b7e02d5dc/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:17:15,682 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434d1ba5-cd78-4d89-8048-868b7e02d5dc/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:17:15,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434d1ba5-cd78-4d89-8048-868b7e02d5dc/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 17:17:15,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:17:15,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:17:15,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-25 17:17:15,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:17:16,438 INFO L134 CoverageAnalysis]: Checked inductivity of 635 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2022-11-25 17:17:16,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:17:17,424 INFO L134 CoverageAnalysis]: Checked inductivity of 635 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2022-11-25 17:17:17,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:17:17,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668849431] [2022-11-25 17:17:17,424 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 17:17:17,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746330922] [2022-11-25 17:17:17,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746330922] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:17:17,425 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:17:17,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 42 [2022-11-25 17:17:17,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33908310] [2022-11-25 17:17:17,425 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:17:17,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-25 17:17:17,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:17:17,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-25 17:17:17,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2022-11-25 17:17:17,428 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) [2022-11-25 17:17:17,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:17:17,634 INFO L93 Difference]: Finished difference Result 139 states and 168 transitions. [2022-11-25 17:17:17,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-11-25 17:17:17,635 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 [2022-11-25 17:17:17,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:17:17,636 INFO L225 Difference]: With dead ends: 139 [2022-11-25 17:17:17,637 INFO L226 Difference]: Without dead ends: 111 [2022-11-25 17:17:17,638 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 156 SyntacticMatches, 6 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2022-11-25 17:17:17,639 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 1 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 17:17:17,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 210 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 17:17:17,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-11-25 17:17:17,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2022-11-25 17:17:17,651 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) [2022-11-25 17:17:17,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 117 transitions. [2022-11-25 17:17:17,652 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 117 transitions. Word has length 102 [2022-11-25 17:17:17,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:17:17,653 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 117 transitions. [2022-11-25 17:17:17,653 INFO L496 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) [2022-11-25 17:17:17,653 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 117 transitions. [2022-11-25 17:17:17,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-11-25 17:17:17,656 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:17:17,656 INFO L195 NwaCegarLoop]: 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] [2022-11-25 17:17:17,673 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434d1ba5-cd78-4d89-8048-868b7e02d5dc/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-25 17:17:17,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434d1ba5-cd78-4d89-8048-868b7e02d5dc/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:17:17,864 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:17:17,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:17:17,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1859225038, now seen corresponding path program 3 times [2022-11-25 17:17:17,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:17:17,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333471289] [2022-11-25 17:17:17,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:17:17,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:17:17,950 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 17:17:17,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [974717233] [2022-11-25 17:17:17,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:17:17,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:17:17,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434d1ba5-cd78-4d89-8048-868b7e02d5dc/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:17:17,953 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434d1ba5-cd78-4d89-8048-868b7e02d5dc/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:17:17,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434d1ba5-cd78-4d89-8048-868b7e02d5dc/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-25 17:17:18,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-25 17:17:18,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:17:18,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 17:17:18,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:17:18,149 INFO L134 CoverageAnalysis]: Checked inductivity of 1751 backedges. 76 proven. 1 refuted. 0 times theorem prover too weak. 1674 trivial. 0 not checked. [2022-11-25 17:17:18,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:17:18,184 INFO L134 CoverageAnalysis]: Checked inductivity of 1751 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1750 trivial. 0 not checked. [2022-11-25 17:17:18,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:17:18,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333471289] [2022-11-25 17:17:18,185 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 17:17:18,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974717233] [2022-11-25 17:17:18,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974717233] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:17:18,185 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:17:18,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-11-25 17:17:18,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630845843] [2022-11-25 17:17:18,187 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:17:18,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 17:17:18,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:17:18,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 17:17:18,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-11-25 17:17:18,189 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) [2022-11-25 17:17:18,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:17:18,226 INFO L93 Difference]: Finished difference Result 137 states and 148 transitions. [2022-11-25 17:17:18,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 17:17:18,227 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 [2022-11-25 17:17:18,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:17:18,232 INFO L225 Difference]: With dead ends: 137 [2022-11-25 17:17:18,232 INFO L226 Difference]: Without dead ends: 117 [2022-11-25 17:17:18,233 INFO L412 NwaCegarLoop]: 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 [2022-11-25 17:17:18,233 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 2 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 17:17:18,235 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 78 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 17:17:18,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-11-25 17:17:18,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2022-11-25 17:17:18,256 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) [2022-11-25 17:17:18,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 123 transitions. [2022-11-25 17:17:18,257 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 123 transitions. Word has length 138 [2022-11-25 17:17:18,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:17:18,257 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 123 transitions. [2022-11-25 17:17:18,258 INFO L496 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) [2022-11-25 17:17:18,258 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 123 transitions. [2022-11-25 17:17:18,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-11-25 17:17:18,263 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:17:18,263 INFO L195 NwaCegarLoop]: 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] [2022-11-25 17:17:18,278 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434d1ba5-cd78-4d89-8048-868b7e02d5dc/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-25 17:17:18,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434d1ba5-cd78-4d89-8048-868b7e02d5dc/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-25 17:17:18,470 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:17:18,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:17:18,471 INFO L85 PathProgramCache]: Analyzing trace with hash 424610296, now seen corresponding path program 4 times [2022-11-25 17:17:18,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:17:18,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477738462] [2022-11-25 17:17:18,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:17:18,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:17:18,541 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 17:17:18,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1652766091] [2022-11-25 17:17:18,542 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 17:17:18,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:17:18,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434d1ba5-cd78-4d89-8048-868b7e02d5dc/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:17:18,544 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434d1ba5-cd78-4d89-8048-868b7e02d5dc/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:17:18,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434d1ba5-cd78-4d89-8048-868b7e02d5dc/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-25 17:17:18,796 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 17:17:18,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:17:18,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 581 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 17:17:18,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:17:18,838 INFO L134 CoverageAnalysis]: Checked inductivity of 1766 backedges. 79 proven. 7 refuted. 0 times theorem prover too weak. 1680 trivial. 0 not checked. [2022-11-25 17:17:18,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:17:18,902 INFO L134 CoverageAnalysis]: Checked inductivity of 1766 backedges. 79 proven. 7 refuted. 0 times theorem prover too weak. 1680 trivial. 0 not checked. [2022-11-25 17:17:18,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:17:18,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477738462] [2022-11-25 17:17:18,903 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 17:17:18,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652766091] [2022-11-25 17:17:18,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652766091] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:17:18,904 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:17:18,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-11-25 17:17:18,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433916474] [2022-11-25 17:17:18,905 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:17:18,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 17:17:18,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:17:18,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 17:17:18,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2022-11-25 17:17:18,907 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) [2022-11-25 17:17:18,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:17:18,946 INFO L93 Difference]: Finished difference Result 161 states and 178 transitions. [2022-11-25 17:17:18,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 17:17:18,947 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 [2022-11-25 17:17:18,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:17:18,949 INFO L225 Difference]: With dead ends: 161 [2022-11-25 17:17:18,949 INFO L226 Difference]: Without dead ends: 129 [2022-11-25 17:17:18,949 INFO L412 NwaCegarLoop]: 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 [2022-11-25 17:17:18,951 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 2 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 17:17:18,951 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 99 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 17:17:18,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-11-25 17:17:18,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2022-11-25 17:17:18,973 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) [2022-11-25 17:17:18,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 135 transitions. [2022-11-25 17:17:18,975 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 135 transitions. Word has length 144 [2022-11-25 17:17:18,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:17:18,977 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 135 transitions. [2022-11-25 17:17:18,977 INFO L496 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) [2022-11-25 17:17:18,977 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 135 transitions. [2022-11-25 17:17:18,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2022-11-25 17:17:18,980 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:17:18,980 INFO L195 NwaCegarLoop]: 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] [2022-11-25 17:17:18,993 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434d1ba5-cd78-4d89-8048-868b7e02d5dc/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-25 17:17:19,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434d1ba5-cd78-4d89-8048-868b7e02d5dc/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:17:19,193 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:17:19,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:17:19,194 INFO L85 PathProgramCache]: Analyzing trace with hash -2049059016, now seen corresponding path program 5 times [2022-11-25 17:17:19,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:17:19,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953782311] [2022-11-25 17:17:19,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:17:19,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:17:19,263 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 17:17:19,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1355557483] [2022-11-25 17:17:19,264 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 17:17:19,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:17:19,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434d1ba5-cd78-4d89-8048-868b7e02d5dc/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:17:19,265 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434d1ba5-cd78-4d89-8048-868b7e02d5dc/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:17:19,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434d1ba5-cd78-4d89-8048-868b7e02d5dc/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-25 17:17:20,259 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 29 check-sat command(s) [2022-11-25 17:17:20,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:17:20,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 17:17:20,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:17:20,307 INFO L134 CoverageAnalysis]: Checked inductivity of 2324 backedges. 354 proven. 2 refuted. 0 times theorem prover too weak. 1968 trivial. 0 not checked. [2022-11-25 17:17:20,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:17:20,365 INFO L134 CoverageAnalysis]: Checked inductivity of 2324 backedges. 28 proven. 82 refuted. 0 times theorem prover too weak. 2214 trivial. 0 not checked. [2022-11-25 17:17:20,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:17:20,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953782311] [2022-11-25 17:17:20,366 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 17:17:20,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355557483] [2022-11-25 17:17:20,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355557483] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:17:20,366 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:17:20,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-11-25 17:17:20,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076128027] [2022-11-25 17:17:20,367 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:17:20,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 17:17:20,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:17:20,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 17:17:20,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2022-11-25 17:17:20,370 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) [2022-11-25 17:17:20,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:17:20,411 INFO L93 Difference]: Finished difference Result 185 states and 206 transitions. [2022-11-25 17:17:20,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 17:17:20,413 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 [2022-11-25 17:17:20,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:17:20,416 INFO L225 Difference]: With dead ends: 185 [2022-11-25 17:17:20,416 INFO L226 Difference]: Without dead ends: 141 [2022-11-25 17:17:20,417 INFO L412 NwaCegarLoop]: 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 [2022-11-25 17:17:20,417 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 7 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 17:17:20,418 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 98 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 17:17:20,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-11-25 17:17:20,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2022-11-25 17:17:20,426 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) [2022-11-25 17:17:20,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 151 transitions. [2022-11-25 17:17:20,427 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 151 transitions. Word has length 180 [2022-11-25 17:17:20,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:17:20,428 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 151 transitions. [2022-11-25 17:17:20,428 INFO L496 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) [2022-11-25 17:17:20,428 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 151 transitions. [2022-11-25 17:17:20,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2022-11-25 17:17:20,431 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:17:20,431 INFO L195 NwaCegarLoop]: 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] [2022-11-25 17:17:20,449 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434d1ba5-cd78-4d89-8048-868b7e02d5dc/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-25 17:17:20,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434d1ba5-cd78-4d89-8048-868b7e02d5dc/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-25 17:17:20,641 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:17:20,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:17:20,641 INFO L85 PathProgramCache]: Analyzing trace with hash -990357256, now seen corresponding path program 6 times [2022-11-25 17:17:20,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:17:20,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440124616] [2022-11-25 17:17:20,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:17:20,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:17:20,704 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 17:17:20,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [269036617] [2022-11-25 17:17:20,705 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 17:17:20,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:17:20,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434d1ba5-cd78-4d89-8048-868b7e02d5dc/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:17:20,706 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434d1ba5-cd78-4d89-8048-868b7e02d5dc/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:17:20,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434d1ba5-cd78-4d89-8048-868b7e02d5dc/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-25 17:17:21,286 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-11-25 17:17:21,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:17:21,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 17:17:21,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:17:21,355 INFO L134 CoverageAnalysis]: Checked inductivity of 3314 backedges. 780 proven. 16 refuted. 0 times theorem prover too weak. 2518 trivial. 0 not checked. [2022-11-25 17:17:21,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:17:21,460 INFO L134 CoverageAnalysis]: Checked inductivity of 3314 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3298 trivial. 0 not checked. [2022-11-25 17:17:21,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:17:21,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440124616] [2022-11-25 17:17:21,460 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 17:17:21,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269036617] [2022-11-25 17:17:21,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269036617] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:17:21,462 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:17:21,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-11-25 17:17:21,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807080649] [2022-11-25 17:17:21,465 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:17:21,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 17:17:21,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:17:21,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 17:17:21,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2022-11-25 17:17:21,469 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) [2022-11-25 17:17:21,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:17:21,518 INFO L93 Difference]: Finished difference Result 197 states and 219 transitions. [2022-11-25 17:17:21,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 17:17:21,519 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 [2022-11-25 17:17:21,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:17:21,521 INFO L225 Difference]: With dead ends: 197 [2022-11-25 17:17:21,521 INFO L226 Difference]: Without dead ends: 153 [2022-11-25 17:17:21,521 INFO L412 NwaCegarLoop]: 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 [2022-11-25 17:17:21,523 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 2 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 17:17:21,523 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 78 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 17:17:21,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-11-25 17:17:21,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2022-11-25 17:17:21,531 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) [2022-11-25 17:17:21,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 163 transitions. [2022-11-25 17:17:21,532 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 163 transitions. Word has length 216 [2022-11-25 17:17:21,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:17:21,533 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 163 transitions. [2022-11-25 17:17:21,533 INFO L496 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) [2022-11-25 17:17:21,534 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 163 transitions. [2022-11-25 17:17:21,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2022-11-25 17:17:21,537 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:17:21,537 INFO L195 NwaCegarLoop]: 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] [2022-11-25 17:17:21,551 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434d1ba5-cd78-4d89-8048-868b7e02d5dc/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-25 17:17:21,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434d1ba5-cd78-4d89-8048-868b7e02d5dc/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-25 17:17:21,745 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:17:21,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:17:21,746 INFO L85 PathProgramCache]: Analyzing trace with hash 597438212, now seen corresponding path program 7 times [2022-11-25 17:17:21,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:17:21,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607116936] [2022-11-25 17:17:21,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:17:21,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:17:21,799 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 17:17:21,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1193141003] [2022-11-25 17:17:21,799 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 17:17:21,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:17:21,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434d1ba5-cd78-4d89-8048-868b7e02d5dc/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:17:21,801 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434d1ba5-cd78-4d89-8048-868b7e02d5dc/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:17:21,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434d1ba5-cd78-4d89-8048-868b7e02d5dc/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-25 17:17:22,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:17:22,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 767 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 17:17:22,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:17:22,186 INFO L134 CoverageAnalysis]: Checked inductivity of 3398 backedges. 549 proven. 57 refuted. 0 times theorem prover too weak. 2792 trivial. 0 not checked. [2022-11-25 17:17:22,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:17:22,339 INFO L134 CoverageAnalysis]: Checked inductivity of 3398 backedges. 93 proven. 835 refuted. 0 times theorem prover too weak. 2470 trivial. 0 not checked. [2022-11-25 17:17:22,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:17:22,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607116936] [2022-11-25 17:17:22,340 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 17:17:22,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193141003] [2022-11-25 17:17:22,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193141003] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:17:22,340 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:17:22,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-11-25 17:17:22,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827235259] [2022-11-25 17:17:22,341 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:17:22,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-25 17:17:22,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:17:22,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-25 17:17:22,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2022-11-25 17:17:22,343 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) [2022-11-25 17:17:22,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:17:22,420 INFO L93 Difference]: Finished difference Result 245 states and 274 transitions. [2022-11-25 17:17:22,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-25 17:17:22,421 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 [2022-11-25 17:17:22,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:17:22,422 INFO L225 Difference]: With dead ends: 245 [2022-11-25 17:17:22,422 INFO L226 Difference]: Without dead ends: 177 [2022-11-25 17:17:22,423 INFO L412 NwaCegarLoop]: 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 [2022-11-25 17:17:22,424 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 2 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 17:17:22,424 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 147 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 17:17:22,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-11-25 17:17:22,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2022-11-25 17:17:22,431 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) [2022-11-25 17:17:22,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 187 transitions. [2022-11-25 17:17:22,433 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 187 transitions. Word has length 228 [2022-11-25 17:17:22,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:17:22,433 INFO L495 AbstractCegarLoop]: Abstraction has 177 states and 187 transitions. [2022-11-25 17:17:22,434 INFO L496 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) [2022-11-25 17:17:22,434 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 187 transitions. [2022-11-25 17:17:22,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2022-11-25 17:17:22,438 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:17:22,439 INFO L195 NwaCegarLoop]: 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] [2022-11-25 17:17:22,451 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434d1ba5-cd78-4d89-8048-868b7e02d5dc/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-25 17:17:22,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434d1ba5-cd78-4d89-8048-868b7e02d5dc/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:17:22,645 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:17:22,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:17:22,646 INFO L85 PathProgramCache]: Analyzing trace with hash -254065276, now seen corresponding path program 8 times [2022-11-25 17:17:22,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:17:22,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024332262] [2022-11-25 17:17:22,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:17:22,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:17:22,708 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 17:17:22,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1541259168] [2022-11-25 17:17:22,709 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:17:22,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:17:22,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434d1ba5-cd78-4d89-8048-868b7e02d5dc/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:17:22,710 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434d1ba5-cd78-4d89-8048-868b7e02d5dc/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:17:22,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434d1ba5-cd78-4d89-8048-868b7e02d5dc/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-25 17:17:23,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:17:23,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:17:23,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 863 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-25 17:17:23,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:17:23,285 INFO L134 CoverageAnalysis]: Checked inductivity of 6674 backedges. 1909 proven. 301 refuted. 0 times theorem prover too weak. 4464 trivial. 0 not checked. [2022-11-25 17:17:23,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:17:23,666 INFO L134 CoverageAnalysis]: Checked inductivity of 6674 backedges. 205 proven. 2551 refuted. 0 times theorem prover too weak. 3918 trivial. 0 not checked. [2022-11-25 17:17:23,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:17:23,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024332262] [2022-11-25 17:17:23,667 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 17:17:23,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541259168] [2022-11-25 17:17:23,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541259168] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:17:23,667 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:17:23,668 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 23 [2022-11-25 17:17:23,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36017544] [2022-11-25 17:17:23,668 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:17:23,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-25 17:17:23,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:17:23,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-25 17:17:23,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2022-11-25 17:17:23,671 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) [2022-11-25 17:17:23,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:17:23,790 INFO L93 Difference]: Finished difference Result 290 states and 318 transitions. [2022-11-25 17:17:23,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-25 17:17:23,791 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 [2022-11-25 17:17:23,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:17:23,792 INFO L225 Difference]: With dead ends: 290 [2022-11-25 17:17:23,793 INFO L226 Difference]: Without dead ends: 198 [2022-11-25 17:17:23,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 598 GetRequests, 568 SyntacticMatches, 9 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2022-11-25 17:17:23,795 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 1 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 17:17:23,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 99 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 17:17:23,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2022-11-25 17:17:23,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2022-11-25 17:17:23,804 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) [2022-11-25 17:17:23,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 208 transitions. [2022-11-25 17:17:23,806 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 208 transitions. Word has length 300 [2022-11-25 17:17:23,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:17:23,807 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 208 transitions. [2022-11-25 17:17:23,807 INFO L496 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) [2022-11-25 17:17:23,807 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 208 transitions. [2022-11-25 17:17:23,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2022-11-25 17:17:23,815 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:17:23,815 INFO L195 NwaCegarLoop]: 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] [2022-11-25 17:17:23,833 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434d1ba5-cd78-4d89-8048-868b7e02d5dc/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-25 17:17:24,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434d1ba5-cd78-4d89-8048-868b7e02d5dc/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:17:24,023 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:17:24,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:17:24,024 INFO L85 PathProgramCache]: Analyzing trace with hash 209485073, now seen corresponding path program 9 times [2022-11-25 17:17:24,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:17:24,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210938120] [2022-11-25 17:17:24,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:17:24,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:17:24,131 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 17:17:24,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1060079834] [2022-11-25 17:17:24,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:17:24,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:17:24,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434d1ba5-cd78-4d89-8048-868b7e02d5dc/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:17:24,134 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434d1ba5-cd78-4d89-8048-868b7e02d5dc/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:17:24,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434d1ba5-cd78-4d89-8048-868b7e02d5dc/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-25 17:17:25,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-11-25 17:17:25,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:17:25,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 17:17:25,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:17:25,523 INFO L134 CoverageAnalysis]: Checked inductivity of 10958 backedges. 1253 proven. 40 refuted. 0 times theorem prover too weak. 9665 trivial. 0 not checked. [2022-11-25 17:17:25,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:17:25,692 INFO L134 CoverageAnalysis]: Checked inductivity of 10958 backedges. 1253 proven. 40 refuted. 0 times theorem prover too weak. 9665 trivial. 0 not checked. [2022-11-25 17:17:25,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:17:25,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210938120] [2022-11-25 17:17:25,693 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 17:17:25,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060079834] [2022-11-25 17:17:25,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060079834] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:17:25,693 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:17:25,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-11-25 17:17:25,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272608194] [2022-11-25 17:17:25,694 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:17:25,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-25 17:17:25,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:17:25,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-25 17:17:25,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2022-11-25 17:17:25,697 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) [2022-11-25 17:17:25,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:17:25,785 INFO L93 Difference]: Finished difference Result 335 states and 372 transitions. [2022-11-25 17:17:25,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-25 17:17:25,786 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 [2022-11-25 17:17:25,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:17:25,788 INFO L225 Difference]: With dead ends: 335 [2022-11-25 17:17:25,788 INFO L226 Difference]: Without dead ends: 222 [2022-11-25 17:17:25,790 INFO L412 NwaCegarLoop]: 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 [2022-11-25 17:17:25,791 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 7 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 17:17:25,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 98 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 17:17:25,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2022-11-25 17:17:25,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 222. [2022-11-25 17:17:25,803 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) [2022-11-25 17:17:25,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 240 transitions. [2022-11-25 17:17:25,806 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 240 transitions. Word has length 363 [2022-11-25 17:17:25,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:17:25,807 INFO L495 AbstractCegarLoop]: Abstraction has 222 states and 240 transitions. [2022-11-25 17:17:25,807 INFO L496 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) [2022-11-25 17:17:25,807 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 240 transitions. [2022-11-25 17:17:25,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 436 [2022-11-25 17:17:25,816 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:17:25,816 INFO L195 NwaCegarLoop]: 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] [2022-11-25 17:17:25,831 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434d1ba5-cd78-4d89-8048-868b7e02d5dc/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-25 17:17:26,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434d1ba5-cd78-4d89-8048-868b7e02d5dc/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-25 17:17:26,032 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:17:26,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:17:26,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1936875921, now seen corresponding path program 10 times [2022-11-25 17:17:26,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:17:26,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420989974] [2022-11-25 17:17:26,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:17:26,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:17:26,106 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 17:17:26,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1655928383] [2022-11-25 17:17:26,107 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 17:17:26,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:17:26,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434d1ba5-cd78-4d89-8048-868b7e02d5dc/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:17:26,109 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434d1ba5-cd78-4d89-8048-868b7e02d5dc/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:17:26,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434d1ba5-cd78-4d89-8048-868b7e02d5dc/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-25 17:17:26,566 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 17:17:26,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:17:26,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 1139 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-25 17:17:26,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:17:27,435 INFO L134 CoverageAnalysis]: Checked inductivity of 17474 backedges. 10619 proven. 1717 refuted. 0 times theorem prover too weak. 5138 trivial. 0 not checked. [2022-11-25 17:17:27,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:17:28,553 INFO L134 CoverageAnalysis]: Checked inductivity of 17474 backedges. 3540 proven. 5257 refuted. 0 times theorem prover too weak. 8677 trivial. 0 not checked. [2022-11-25 17:17:28,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:17:28,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420989974] [2022-11-25 17:17:28,555 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 17:17:28,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655928383] [2022-11-25 17:17:28,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655928383] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:17:28,556 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:17:28,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 42 [2022-11-25 17:17:28,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153717573] [2022-11-25 17:17:28,560 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:17:28,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-25 17:17:28,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:17:28,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-25 17:17:28,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2022-11-25 17:17:28,567 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) [2022-11-25 17:17:28,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:17:28,849 INFO L93 Difference]: Finished difference Result 377 states and 426 transitions. [2022-11-25 17:17:28,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-11-25 17:17:28,850 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 [2022-11-25 17:17:28,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:17:28,852 INFO L225 Difference]: With dead ends: 377 [2022-11-25 17:17:28,852 INFO L226 Difference]: Without dead ends: 240 [2022-11-25 17:17:28,854 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 868 GetRequests, 798 SyntacticMatches, 30 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2022-11-25 17:17:28,854 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 17 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 17:17:28,855 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 146 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 17:17:28,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-11-25 17:17:28,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 240. [2022-11-25 17:17:28,867 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) [2022-11-25 17:17:28,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 264 transitions. [2022-11-25 17:17:28,869 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 264 transitions. Word has length 435 [2022-11-25 17:17:28,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:17:28,870 INFO L495 AbstractCegarLoop]: Abstraction has 240 states and 264 transitions. [2022-11-25 17:17:28,870 INFO L496 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) [2022-11-25 17:17:28,870 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 264 transitions. [2022-11-25 17:17:28,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 490 [2022-11-25 17:17:28,874 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:17:28,875 INFO L195 NwaCegarLoop]: 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] [2022-11-25 17:17:28,884 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434d1ba5-cd78-4d89-8048-868b7e02d5dc/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-25 17:17:29,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434d1ba5-cd78-4d89-8048-868b7e02d5dc/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-25 17:17:29,084 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:17:29,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:17:29,085 INFO L85 PathProgramCache]: Analyzing trace with hash -1806165775, now seen corresponding path program 11 times [2022-11-25 17:17:29,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:17:29,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429392682] [2022-11-25 17:17:29,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:17:29,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:17:29,159 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 17:17:29,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [310612172] [2022-11-25 17:17:29,160 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 17:17:29,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:17:29,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434d1ba5-cd78-4d89-8048-868b7e02d5dc/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:17:29,162 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434d1ba5-cd78-4d89-8048-868b7e02d5dc/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:17:29,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434d1ba5-cd78-4d89-8048-868b7e02d5dc/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-25 17:30:48,593 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 81 check-sat command(s) [2022-11-25 17:30:48,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:30:48,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 1211 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-25 17:30:48,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:30:49,045 INFO L134 CoverageAnalysis]: Checked inductivity of 23495 backedges. 9770 proven. 100 refuted. 0 times theorem prover too weak. 13625 trivial. 0 not checked. [2022-11-25 17:30:49,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:30:49,300 INFO L134 CoverageAnalysis]: Checked inductivity of 23495 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 23395 trivial. 0 not checked. [2022-11-25 17:30:49,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:30:49,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429392682] [2022-11-25 17:30:49,301 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 17:30:49,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310612172] [2022-11-25 17:30:49,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310612172] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:30:49,302 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:30:49,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2022-11-25 17:30:49,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875871936] [2022-11-25 17:30:49,302 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:30:49,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-25 17:30:49,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:30:49,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-25 17:30:49,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2022-11-25 17:30:49,309 INFO L87 Difference]: Start difference. First operand 240 states and 264 transitions. Second operand has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 24 states have internal predecessors, (71), 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) [2022-11-25 17:30:49,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:30:49,383 INFO L93 Difference]: Finished difference Result 395 states and 451 transitions. [2022-11-25 17:30:49,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-25 17:30:49,384 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), 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 489 [2022-11-25 17:30:49,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:30:49,388 INFO L225 Difference]: With dead ends: 395 [2022-11-25 17:30:49,388 INFO L226 Difference]: Without dead ends: 264 [2022-11-25 17:30:49,389 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 976 GetRequests, 954 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2022-11-25 17:30:49,390 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 2 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 17:30:49,391 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 203 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 17:30:49,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2022-11-25 17:30:49,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 264. [2022-11-25 17:30:49,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 259 states have (on average 1.0888030888030888) internal successors, (282), 259 states have internal predecessors, (282), 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) [2022-11-25 17:30:49,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 288 transitions. [2022-11-25 17:30:49,401 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 288 transitions. Word has length 489 [2022-11-25 17:30:49,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:30:49,401 INFO L495 AbstractCegarLoop]: Abstraction has 264 states and 288 transitions. [2022-11-25 17:30:49,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 24 states have internal predecessors, (71), 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) [2022-11-25 17:30:49,402 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 288 transitions. [2022-11-25 17:30:49,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 514 [2022-11-25 17:30:49,405 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:30:49,406 INFO L195 NwaCegarLoop]: trace histogram [120, 120, 63, 57, 40, 40, 22, 22, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:30:49,624 WARN L435 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434d1ba5-cd78-4d89-8048-868b7e02d5dc/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forcibly destroying the process [2022-11-25 17:30:49,682 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434d1ba5-cd78-4d89-8048-868b7e02d5dc/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 137 [2022-11-25 17:30:49,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434d1ba5-cd78-4d89-8048-868b7e02d5dc/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-25 17:30:49,682 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:30:49,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:30:49,683 INFO L85 PathProgramCache]: Analyzing trace with hash -121582631, now seen corresponding path program 12 times [2022-11-25 17:30:49,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:30:49,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528004847] [2022-11-25 17:30:49,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:30:49,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:30:49,744 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 17:30:49,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [773126731] [2022-11-25 17:30:49,744 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 17:30:49,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:30:49,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434d1ba5-cd78-4d89-8048-868b7e02d5dc/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:30:49,746 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434d1ba5-cd78-4d89-8048-868b7e02d5dc/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:30:49,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434d1ba5-cd78-4d89-8048-868b7e02d5dc/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-25 17:31:22,530 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 47 check-sat command(s) [2022-11-25 17:31:22,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:31:22,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 974 conjuncts, 109 conjunts are in the unsatisfiable core [2022-11-25 17:31:22,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:31:23,119 INFO L134 CoverageAnalysis]: Checked inductivity of 23879 backedges. 10088 proven. 484 refuted. 0 times theorem prover too weak. 13307 trivial. 0 not checked. [2022-11-25 17:31:23,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:31:24,016 INFO L134 CoverageAnalysis]: Checked inductivity of 23879 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 23395 trivial. 0 not checked. [2022-11-25 17:31:24,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:31:24,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528004847] [2022-11-25 17:31:24,016 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 17:31:24,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773126731] [2022-11-25 17:31:24,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773126731] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:31:24,017 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:31:24,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 25] total 45 [2022-11-25 17:31:24,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944919560] [2022-11-25 17:31:24,018 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:31:24,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-25 17:31:24,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:31:24,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-25 17:31:24,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=830, Invalid=1150, Unknown=0, NotChecked=0, Total=1980 [2022-11-25 17:31:24,022 INFO L87 Difference]: Start difference. First operand 264 states and 288 transitions. Second operand has 45 states, 45 states have (on average 2.533333333333333) internal successors, (114), 45 states have internal predecessors, (114), 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) [2022-11-25 17:31:25,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:31:25,172 INFO L93 Difference]: Finished difference Result 429 states and 490 transitions. [2022-11-25 17:31:25,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-25 17:31:25,173 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.533333333333333) internal successors, (114), 45 states have internal predecessors, (114), 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 513 [2022-11-25 17:31:25,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:31:25,175 INFO L225 Difference]: With dead ends: 429 [2022-11-25 17:31:25,175 INFO L226 Difference]: Without dead ends: 298 [2022-11-25 17:31:25,177 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1063 GetRequests, 974 SyntacticMatches, 7 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1073 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2468, Invalid=4504, Unknown=0, NotChecked=0, Total=6972 [2022-11-25 17:31:25,177 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 94 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 17:31:25,178 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 215 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 17:31:25,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2022-11-25 17:31:25,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 298. [2022-11-25 17:31:25,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 293 states have (on average 1.0784982935153584) internal successors, (316), 293 states have internal predecessors, (316), 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) [2022-11-25 17:31:25,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 322 transitions. [2022-11-25 17:31:25,191 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 322 transitions. Word has length 513 [2022-11-25 17:31:25,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:31:25,192 INFO L495 AbstractCegarLoop]: Abstraction has 298 states and 322 transitions. [2022-11-25 17:31:25,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.533333333333333) internal successors, (114), 45 states have internal predecessors, (114), 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) [2022-11-25 17:31:25,192 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 322 transitions. [2022-11-25 17:31:25,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 548 [2022-11-25 17:31:25,196 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:31:25,196 INFO L195 NwaCegarLoop]: trace histogram [120, 120, 63, 57, 40, 40, 39, 39, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:31:25,249 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434d1ba5-cd78-4d89-8048-868b7e02d5dc/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-25 17:31:25,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434d1ba5-cd78-4d89-8048-868b7e02d5dc/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:31:25,408 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:31:25,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:31:25,408 INFO L85 PathProgramCache]: Analyzing trace with hash -880104649, now seen corresponding path program 13 times [2022-11-25 17:31:25,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:31:25,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774272639] [2022-11-25 17:31:25,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:31:25,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:31:25,472 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 17:31:25,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1884736796] [2022-11-25 17:31:25,473 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 17:31:25,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:31:25,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434d1ba5-cd78-4d89-8048-868b7e02d5dc/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:31:25,474 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434d1ba5-cd78-4d89-8048-868b7e02d5dc/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:31:25,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434d1ba5-cd78-4d89-8048-868b7e02d5dc/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process