./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/reducercommutativity/rangesum05.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e943c265 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64a95c-d05e-413a-8395-d00d62df5a8e/bin/uautomizer-j4sWxH34Be/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64a95c-d05e-413a-8395-d00d62df5a8e/bin/uautomizer-j4sWxH34Be/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64a95c-d05e-413a-8395-d00d62df5a8e/bin/uautomizer-j4sWxH34Be/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64a95c-d05e-413a-8395-d00d62df5a8e/bin/uautomizer-j4sWxH34Be/config/AutomizerReach.xml -i ../../sv-benchmarks/c/reducercommutativity/rangesum05.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64a95c-d05e-413a-8395-d00d62df5a8e/bin/uautomizer-j4sWxH34Be/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64a95c-d05e-413a-8395-d00d62df5a8e/bin/uautomizer-j4sWxH34Be --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 aee69f990ab81a58f1fe8cd275c8a09f43ca6a442f73810f885d3d0c9a85d2b3 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-e943c26 [2021-10-21 19:11:25,151 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-21 19:11:25,154 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-21 19:11:25,207 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-21 19:11:25,207 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-21 19:11:25,209 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-21 19:11:25,211 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-21 19:11:25,214 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-21 19:11:25,216 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-21 19:11:25,218 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-21 19:11:25,219 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-21 19:11:25,221 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-21 19:11:25,222 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-21 19:11:25,223 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-21 19:11:25,225 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-21 19:11:25,227 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-21 19:11:25,229 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-21 19:11:25,230 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-21 19:11:25,233 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-21 19:11:25,237 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-21 19:11:25,239 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-21 19:11:25,241 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-21 19:11:25,243 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-21 19:11:25,244 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-21 19:11:25,249 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-21 19:11:25,249 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-21 19:11:25,250 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-21 19:11:25,251 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-21 19:11:25,252 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-21 19:11:25,253 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-21 19:11:25,254 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-21 19:11:25,255 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-21 19:11:25,256 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-21 19:11:25,261 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-21 19:11:25,263 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-21 19:11:25,264 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-21 19:11:25,265 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-21 19:11:25,265 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-21 19:11:25,265 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-21 19:11:25,267 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-21 19:11:25,273 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-21 19:11:25,275 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64a95c-d05e-413a-8395-d00d62df5a8e/bin/uautomizer-j4sWxH34Be/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-21 19:11:25,316 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-21 19:11:25,321 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-21 19:11:25,322 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-21 19:11:25,323 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-21 19:11:25,325 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-21 19:11:25,326 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-21 19:11:25,326 INFO L138 SettingsManager]: * Use SBE=true [2021-10-21 19:11:25,326 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-21 19:11:25,327 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-21 19:11:25,327 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-21 19:11:25,328 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-21 19:11:25,329 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-21 19:11:25,329 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-21 19:11:25,329 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-21 19:11:25,329 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-21 19:11:25,330 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-21 19:11:25,330 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-21 19:11:25,330 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-21 19:11:25,331 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-21 19:11:25,331 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-21 19:11:25,331 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-21 19:11:25,331 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-21 19:11:25,332 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 19:11:25,332 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-21 19:11:25,332 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-21 19:11:25,333 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-21 19:11:25,333 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-21 19:11:25,333 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-21 19:11:25,333 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-21 19:11:25,334 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-21 19:11:25,334 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-21 19:11:25,334 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-21 19:11:25,335 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64a95c-d05e-413a-8395-d00d62df5a8e/bin/uautomizer-j4sWxH34Be/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64a95c-d05e-413a-8395-d00d62df5a8e/bin/uautomizer-j4sWxH34Be Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> aee69f990ab81a58f1fe8cd275c8a09f43ca6a442f73810f885d3d0c9a85d2b3 [2021-10-21 19:11:25,680 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-21 19:11:25,707 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-21 19:11:25,710 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-21 19:11:25,711 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-21 19:11:25,712 INFO L275 PluginConnector]: CDTParser initialized [2021-10-21 19:11:25,713 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64a95c-d05e-413a-8395-d00d62df5a8e/bin/uautomizer-j4sWxH34Be/../../sv-benchmarks/c/reducercommutativity/rangesum05.i [2021-10-21 19:11:25,800 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64a95c-d05e-413a-8395-d00d62df5a8e/bin/uautomizer-j4sWxH34Be/data/96898a990/d03c675172154353ba4fcd5573de9776/FLAG242aace2d [2021-10-21 19:11:26,341 INFO L306 CDTParser]: Found 1 translation units. [2021-10-21 19:11:26,342 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64a95c-d05e-413a-8395-d00d62df5a8e/sv-benchmarks/c/reducercommutativity/rangesum05.i [2021-10-21 19:11:26,350 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64a95c-d05e-413a-8395-d00d62df5a8e/bin/uautomizer-j4sWxH34Be/data/96898a990/d03c675172154353ba4fcd5573de9776/FLAG242aace2d [2021-10-21 19:11:26,669 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64a95c-d05e-413a-8395-d00d62df5a8e/bin/uautomizer-j4sWxH34Be/data/96898a990/d03c675172154353ba4fcd5573de9776 [2021-10-21 19:11:26,672 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-21 19:11:26,674 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-21 19:11:26,676 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-21 19:11:26,676 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-21 19:11:26,689 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-21 19:11:26,690 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:11:26" (1/1) ... [2021-10-21 19:11:26,691 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66208437 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:11:26, skipping insertion in model container [2021-10-21 19:11:26,691 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:11:26" (1/1) ... [2021-10-21 19:11:26,700 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-21 19:11:26,720 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-21 19:11:26,942 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64a95c-d05e-413a-8395-d00d62df5a8e/sv-benchmarks/c/reducercommutativity/rangesum05.i[1457,1470] [2021-10-21 19:11:26,946 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:11:26,954 INFO L203 MainTranslator]: Completed pre-run [2021-10-21 19:11:26,982 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64a95c-d05e-413a-8395-d00d62df5a8e/sv-benchmarks/c/reducercommutativity/rangesum05.i[1457,1470] [2021-10-21 19:11:26,983 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:11:27,000 INFO L208 MainTranslator]: Completed translation [2021-10-21 19:11:27,000 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:11:27 WrapperNode [2021-10-21 19:11:27,001 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-21 19:11:27,002 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-21 19:11:27,002 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-21 19:11:27,002 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-21 19:11:27,011 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:11:27" (1/1) ... [2021-10-21 19:11:27,020 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:11:27" (1/1) ... [2021-10-21 19:11:27,051 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-21 19:11:27,052 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-21 19:11:27,052 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-21 19:11:27,052 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-21 19:11:27,066 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:11:27" (1/1) ... [2021-10-21 19:11:27,066 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:11:27" (1/1) ... [2021-10-21 19:11:27,071 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:11:27" (1/1) ... [2021-10-21 19:11:27,071 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:11:27" (1/1) ... [2021-10-21 19:11:27,081 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:11:27" (1/1) ... [2021-10-21 19:11:27,086 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:11:27" (1/1) ... [2021-10-21 19:11:27,089 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:11:27" (1/1) ... [2021-10-21 19:11:27,092 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-21 19:11:27,094 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-21 19:11:27,094 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-21 19:11:27,094 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-21 19:11:27,095 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:11:27" (1/1) ... [2021-10-21 19:11:27,104 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 19:11:27,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64a95c-d05e-413a-8395-d00d62df5a8e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:11:27,136 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64a95c-d05e-413a-8395-d00d62df5a8e/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-21 19:11:27,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64a95c-d05e-413a-8395-d00d62df5a8e/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-21 19:11:27,195 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-21 19:11:27,196 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-21 19:11:27,196 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-21 19:11:27,196 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-21 19:11:27,196 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-21 19:11:27,196 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-21 19:11:27,197 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-21 19:11:27,568 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-21 19:11:27,569 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2021-10-21 19:11:27,571 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:11:27 BoogieIcfgContainer [2021-10-21 19:11:27,571 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-21 19:11:27,574 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-21 19:11:27,574 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-21 19:11:27,600 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-21 19:11:27,601 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.10 07:11:26" (1/3) ... [2021-10-21 19:11:27,602 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@206b8667 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 07:11:27, skipping insertion in model container [2021-10-21 19:11:27,602 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:11:27" (2/3) ... [2021-10-21 19:11:27,603 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@206b8667 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 07:11:27, skipping insertion in model container [2021-10-21 19:11:27,603 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:11:27" (3/3) ... [2021-10-21 19:11:27,605 INFO L111 eAbstractionObserver]: Analyzing ICFG rangesum05.i [2021-10-21 19:11:27,611 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-21 19:11:27,611 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-21 19:11:27,739 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-21 19:11:27,758 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-21 19:11:27,759 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-21 19:11:27,783 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 29 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:11:27,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-21 19:11:27,789 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:11:27,790 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:11:27,791 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:11:27,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:11:27,797 INFO L82 PathProgramCache]: Analyzing trace with hash -919167012, now seen corresponding path program 1 times [2021-10-21 19:11:27,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:11:27,809 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294991258] [2021-10-21 19:11:27,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:11:27,811 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:11:27,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:28,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:11:28,017 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:11:28,017 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294991258] [2021-10-21 19:11:28,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294991258] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:11:28,018 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:11:28,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 19:11:28,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058213437] [2021-10-21 19:11:28,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-21 19:11:28,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:11:28,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-21 19:11:28,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:11:28,048 INFO L87 Difference]: Start difference. First operand has 30 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 29 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:11:28,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:11:28,082 INFO L93 Difference]: Finished difference Result 58 states and 90 transitions. [2021-10-21 19:11:28,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-21 19:11:28,084 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-21 19:11:28,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:11:28,094 INFO L225 Difference]: With dead ends: 58 [2021-10-21 19:11:28,094 INFO L226 Difference]: Without dead ends: 28 [2021-10-21 19:11:28,097 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:11:28,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-10-21 19:11:28,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2021-10-21 19:11:28,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:11:28,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2021-10-21 19:11:28,137 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 17 [2021-10-21 19:11:28,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:11:28,138 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2021-10-21 19:11:28,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:11:28,139 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2021-10-21 19:11:28,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-21 19:11:28,140 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:11:28,140 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:11:28,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-21 19:11:28,141 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:11:28,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:11:28,142 INFO L82 PathProgramCache]: Analyzing trace with hash -1403287377, now seen corresponding path program 1 times [2021-10-21 19:11:28,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:11:28,143 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885873585] [2021-10-21 19:11:28,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:11:28,143 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:11:28,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:28,265 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:11:28,266 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:11:28,266 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885873585] [2021-10-21 19:11:28,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885873585] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:11:28,267 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031808929] [2021-10-21 19:11:28,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:11:28,268 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:11:28,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64a95c-d05e-413a-8395-d00d62df5a8e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:11:28,314 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64a95c-d05e-413a-8395-d00d62df5a8e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:11:28,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64a95c-d05e-413a-8395-d00d62df5a8e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-21 19:11:28,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:28,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-21 19:11:28,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:11:28,515 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:11:28,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031808929] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:11:28,516 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:11:28,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-10-21 19:11:28,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375186839] [2021-10-21 19:11:28,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-21 19:11:28,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:11:28,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-21 19:11:28,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:11:28,521 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:11:28,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:11:28,579 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2021-10-21 19:11:28,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-21 19:11:28,580 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-10-21 19:11:28,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:11:28,582 INFO L225 Difference]: With dead ends: 57 [2021-10-21 19:11:28,582 INFO L226 Difference]: Without dead ends: 36 [2021-10-21 19:11:28,583 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 22.7ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:11:28,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-10-21 19:11:28,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2021-10-21 19:11:28,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.34375) internal successors, (43), 32 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:11:28,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2021-10-21 19:11:28,592 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 19 [2021-10-21 19:11:28,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:11:28,593 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2021-10-21 19:11:28,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:11:28,593 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2021-10-21 19:11:28,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-21 19:11:28,595 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:11:28,595 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:11:28,645 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64a95c-d05e-413a-8395-d00d62df5a8e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-21 19:11:28,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64a95c-d05e-413a-8395-d00d62df5a8e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:11:28,823 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:11:28,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:11:28,824 INFO L82 PathProgramCache]: Analyzing trace with hash -1132417868, now seen corresponding path program 1 times [2021-10-21 19:11:28,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:11:28,825 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193241245] [2021-10-21 19:11:28,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:11:28,825 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:11:28,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:28,890 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-21 19:11:28,890 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:11:28,891 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193241245] [2021-10-21 19:11:28,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193241245] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:11:28,892 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817493907] [2021-10-21 19:11:28,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:11:28,892 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:11:28,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64a95c-d05e-413a-8395-d00d62df5a8e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:11:28,894 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64a95c-d05e-413a-8395-d00d62df5a8e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:11:28,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64a95c-d05e-413a-8395-d00d62df5a8e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-21 19:11:28,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:28,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-21 19:11:28,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:11:29,077 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-21 19:11:29,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817493907] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:11:29,078 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:11:29,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-10-21 19:11:29,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337431651] [2021-10-21 19:11:29,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-21 19:11:29,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:11:29,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-21 19:11:29,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:11:29,081 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:11:29,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:11:29,096 INFO L93 Difference]: Finished difference Result 46 states and 59 transitions. [2021-10-21 19:11:29,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-21 19:11:29,097 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-10-21 19:11:29,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:11:29,099 INFO L225 Difference]: With dead ends: 46 [2021-10-21 19:11:29,099 INFO L226 Difference]: Without dead ends: 35 [2021-10-21 19:11:29,099 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 11.3ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:11:29,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-10-21 19:11:29,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2021-10-21 19:11:29,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.3333333333333333) internal successors, (44), 33 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:11:29,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 44 transitions. [2021-10-21 19:11:29,106 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 44 transitions. Word has length 28 [2021-10-21 19:11:29,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:11:29,107 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 44 transitions. [2021-10-21 19:11:29,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:11:29,107 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 44 transitions. [2021-10-21 19:11:29,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-21 19:11:29,109 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:11:29,109 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:11:29,156 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64a95c-d05e-413a-8395-d00d62df5a8e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-21 19:11:29,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64a95c-d05e-413a-8395-d00d62df5a8e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:11:29,331 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:11:29,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:11:29,331 INFO L82 PathProgramCache]: Analyzing trace with hash 513768630, now seen corresponding path program 1 times [2021-10-21 19:11:29,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:11:29,332 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117229971] [2021-10-21 19:11:29,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:11:29,332 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:11:29,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:29,434 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-21 19:11:29,435 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:11:29,435 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117229971] [2021-10-21 19:11:29,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117229971] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:11:29,436 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622724422] [2021-10-21 19:11:29,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:11:29,436 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:11:29,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64a95c-d05e-413a-8395-d00d62df5a8e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:11:29,439 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64a95c-d05e-413a-8395-d00d62df5a8e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:11:29,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64a95c-d05e-413a-8395-d00d62df5a8e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-21 19:11:29,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:29,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-21 19:11:29,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:11:29,641 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-21 19:11:29,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622724422] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:11:29,642 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:11:29,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-10-21 19:11:29,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997628597] [2021-10-21 19:11:29,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-21 19:11:29,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:11:29,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-21 19:11:29,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:11:29,646 INFO L87 Difference]: Start difference. First operand 34 states and 44 transitions. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:11:29,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:11:29,717 INFO L93 Difference]: Finished difference Result 78 states and 103 transitions. [2021-10-21 19:11:29,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-21 19:11:29,718 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-10-21 19:11:29,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:11:29,722 INFO L225 Difference]: With dead ends: 78 [2021-10-21 19:11:29,722 INFO L226 Difference]: Without dead ends: 56 [2021-10-21 19:11:29,723 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 11.0ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:11:29,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-10-21 19:11:29,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 46. [2021-10-21 19:11:29,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.3777777777777778) internal successors, (62), 45 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:11:29,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 62 transitions. [2021-10-21 19:11:29,743 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 62 transitions. Word has length 30 [2021-10-21 19:11:29,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:11:29,744 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 62 transitions. [2021-10-21 19:11:29,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:11:29,745 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 62 transitions. [2021-10-21 19:11:29,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-21 19:11:29,747 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:11:29,747 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:11:29,789 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64a95c-d05e-413a-8395-d00d62df5a8e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-21 19:11:29,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64a95c-d05e-413a-8395-d00d62df5a8e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:11:29,971 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:11:29,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:11:29,971 INFO L82 PathProgramCache]: Analyzing trace with hash -303820238, now seen corresponding path program 1 times [2021-10-21 19:11:29,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:11:29,972 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107119868] [2021-10-21 19:11:29,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:11:29,972 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:11:29,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:30,066 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-21 19:11:30,066 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:11:30,067 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107119868] [2021-10-21 19:11:30,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107119868] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:11:30,067 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158905539] [2021-10-21 19:11:30,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:11:30,068 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:11:30,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64a95c-d05e-413a-8395-d00d62df5a8e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:11:30,069 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64a95c-d05e-413a-8395-d00d62df5a8e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:11:30,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64a95c-d05e-413a-8395-d00d62df5a8e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-21 19:11:30,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:30,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-21 19:11:30,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:11:30,346 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-21 19:11:30,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158905539] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:11:30,353 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:11:30,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-10-21 19:11:30,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42020768] [2021-10-21 19:11:30,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-21 19:11:30,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:11:30,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-21 19:11:30,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:11:30,364 INFO L87 Difference]: Start difference. First operand 46 states and 62 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:11:30,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:11:30,395 INFO L93 Difference]: Finished difference Result 90 states and 122 transitions. [2021-10-21 19:11:30,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:11:30,396 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-10-21 19:11:30,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:11:30,397 INFO L225 Difference]: With dead ends: 90 [2021-10-21 19:11:30,400 INFO L226 Difference]: Without dead ends: 49 [2021-10-21 19:11:30,401 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.7ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:11:30,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-10-21 19:11:30,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2021-10-21 19:11:30,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.3617021276595744) internal successors, (64), 47 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:11:30,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 64 transitions. [2021-10-21 19:11:30,415 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 64 transitions. Word has length 30 [2021-10-21 19:11:30,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:11:30,416 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 64 transitions. [2021-10-21 19:11:30,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:11:30,417 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 64 transitions. [2021-10-21 19:11:30,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-21 19:11:30,418 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:11:30,419 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:11:30,448 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64a95c-d05e-413a-8395-d00d62df5a8e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-21 19:11:30,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64a95c-d05e-413a-8395-d00d62df5a8e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:11:30,630 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:11:30,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:11:30,631 INFO L82 PathProgramCache]: Analyzing trace with hash 612513716, now seen corresponding path program 2 times [2021-10-21 19:11:30,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:11:30,631 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865509921] [2021-10-21 19:11:30,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:11:30,632 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:11:30,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:30,738 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-21 19:11:30,739 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:11:30,739 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865509921] [2021-10-21 19:11:30,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865509921] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:11:30,739 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507650883] [2021-10-21 19:11:30,740 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:11:30,740 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:11:30,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64a95c-d05e-413a-8395-d00d62df5a8e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:11:30,747 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64a95c-d05e-413a-8395-d00d62df5a8e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:11:30,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64a95c-d05e-413a-8395-d00d62df5a8e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-21 19:11:30,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-21 19:11:30,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:11:30,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-21 19:11:30,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:11:31,106 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-21 19:11:31,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507650883] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:11:31,107 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:11:31,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [4] total 10 [2021-10-21 19:11:31,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054384987] [2021-10-21 19:11:31,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-21 19:11:31,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:11:31,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-21 19:11:31,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-10-21 19:11:31,111 INFO L87 Difference]: Start difference. First operand 48 states and 64 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:11:31,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:11:31,197 INFO L93 Difference]: Finished difference Result 114 states and 143 transitions. [2021-10-21 19:11:31,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-21 19:11:31,198 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-10-21 19:11:31,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:11:31,200 INFO L225 Difference]: With dead ends: 114 [2021-10-21 19:11:31,200 INFO L226 Difference]: Without dead ends: 109 [2021-10-21 19:11:31,202 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 64.6ms TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-10-21 19:11:31,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-10-21 19:11:31,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 73. [2021-10-21 19:11:31,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.3611111111111112) internal successors, (98), 72 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:11:31,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 98 transitions. [2021-10-21 19:11:31,227 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 98 transitions. Word has length 32 [2021-10-21 19:11:31,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:11:31,227 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 98 transitions. [2021-10-21 19:11:31,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:11:31,230 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 98 transitions. [2021-10-21 19:11:31,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-21 19:11:31,237 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:11:31,237 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:11:31,277 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64a95c-d05e-413a-8395-d00d62df5a8e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-21 19:11:31,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64a95c-d05e-413a-8395-d00d62df5a8e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-10-21 19:11:31,451 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:11:31,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:11:31,451 INFO L82 PathProgramCache]: Analyzing trace with hash -582685651, now seen corresponding path program 1 times [2021-10-21 19:11:31,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:11:31,452 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850373073] [2021-10-21 19:11:31,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:11:31,452 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:11:31,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:31,506 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-21 19:11:31,506 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:11:31,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850373073] [2021-10-21 19:11:31,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850373073] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:11:31,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369279612] [2021-10-21 19:11:31,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:11:31,508 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:11:31,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64a95c-d05e-413a-8395-d00d62df5a8e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:11:31,513 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64a95c-d05e-413a-8395-d00d62df5a8e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:11:31,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64a95c-d05e-413a-8395-d00d62df5a8e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-21 19:11:31,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:31,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-21 19:11:31,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:11:31,769 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-21 19:11:31,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369279612] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:11:31,769 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:11:31,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2021-10-21 19:11:31,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57422295] [2021-10-21 19:11:31,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-21 19:11:31,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:11:31,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-21 19:11:31,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-21 19:11:31,772 INFO L87 Difference]: Start difference. First operand 73 states and 98 transitions. Second operand has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:11:31,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:11:31,871 INFO L93 Difference]: Finished difference Result 162 states and 221 transitions. [2021-10-21 19:11:31,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-21 19:11:31,872 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-10-21 19:11:31,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:11:31,875 INFO L225 Difference]: With dead ends: 162 [2021-10-21 19:11:31,875 INFO L226 Difference]: Without dead ends: 96 [2021-10-21 19:11:31,876 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 20.5ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-21 19:11:31,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-10-21 19:11:31,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 90. [2021-10-21 19:11:31,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.2921348314606742) internal successors, (115), 89 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:11:31,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 115 transitions. [2021-10-21 19:11:31,909 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 115 transitions. Word has length 35 [2021-10-21 19:11:31,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:11:31,909 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 115 transitions. [2021-10-21 19:11:31,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:11:31,910 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 115 transitions. [2021-10-21 19:11:31,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-10-21 19:11:31,912 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:11:31,912 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:11:31,955 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64a95c-d05e-413a-8395-d00d62df5a8e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-21 19:11:32,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64a95c-d05e-413a-8395-d00d62df5a8e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:11:32,131 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:11:32,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:11:32,131 INFO L82 PathProgramCache]: Analyzing trace with hash 2109979210, now seen corresponding path program 2 times [2021-10-21 19:11:32,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:11:32,131 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107692295] [2021-10-21 19:11:32,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:11:32,132 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:11:32,152 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:11:32,153 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [667517015] [2021-10-21 19:11:32,153 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:11:32,153 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:11:32,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64a95c-d05e-413a-8395-d00d62df5a8e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:11:32,167 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64a95c-d05e-413a-8395-d00d62df5a8e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:11:32,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64a95c-d05e-413a-8395-d00d62df5a8e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-21 19:11:32,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:11:32,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:11:32,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-21 19:11:32,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:11:32,466 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-10-21 19:11:32,466 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:11:32,466 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107692295] [2021-10-21 19:11:32,467 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:11:32,467 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667517015] [2021-10-21 19:11:32,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667517015] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:11:32,467 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:11:32,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-10-21 19:11:32,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673981408] [2021-10-21 19:11:32,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 19:11:32,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:11:32,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 19:11:32,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-10-21 19:11:32,470 INFO L87 Difference]: Start difference. First operand 90 states and 115 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:11:32,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:11:32,494 INFO L93 Difference]: Finished difference Result 174 states and 224 transitions. [2021-10-21 19:11:32,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 19:11:32,495 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-10-21 19:11:32,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:11:32,496 INFO L225 Difference]: With dead ends: 174 [2021-10-21 19:11:32,496 INFO L226 Difference]: Without dead ends: 93 [2021-10-21 19:11:32,497 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.3ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-10-21 19:11:32,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-10-21 19:11:32,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2021-10-21 19:11:32,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.2857142857142858) internal successors, (117), 91 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:11:32,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 117 transitions. [2021-10-21 19:11:32,507 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 117 transitions. Word has length 46 [2021-10-21 19:11:32,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:11:32,507 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 117 transitions. [2021-10-21 19:11:32,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:11:32,508 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 117 transitions. [2021-10-21 19:11:32,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-10-21 19:11:32,510 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:11:32,510 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:11:32,566 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64a95c-d05e-413a-8395-d00d62df5a8e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-21 19:11:32,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64a95c-d05e-413a-8395-d00d62df5a8e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:11:32,718 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:11:32,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:11:32,719 INFO L82 PathProgramCache]: Analyzing trace with hash 1002085324, now seen corresponding path program 3 times [2021-10-21 19:11:32,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:11:32,719 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274192538] [2021-10-21 19:11:32,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:11:32,719 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:11:32,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:32,773 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-10-21 19:11:32,773 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:11:32,774 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274192538] [2021-10-21 19:11:32,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274192538] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:11:32,774 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:11:32,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:11:32,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258976072] [2021-10-21 19:11:32,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:11:32,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:11:32,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:11:32,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:11:32,776 INFO L87 Difference]: Start difference. First operand 92 states and 117 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:11:32,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:11:32,830 INFO L93 Difference]: Finished difference Result 177 states and 232 transitions. [2021-10-21 19:11:32,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:11:32,831 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-10-21 19:11:32,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:11:32,833 INFO L225 Difference]: With dead ends: 177 [2021-10-21 19:11:32,833 INFO L226 Difference]: Without dead ends: 108 [2021-10-21 19:11:32,833 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.4ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:11:32,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-10-21 19:11:32,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 83. [2021-10-21 19:11:32,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.2073170731707317) internal successors, (99), 82 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:11:32,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 99 transitions. [2021-10-21 19:11:32,847 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 99 transitions. Word has length 48 [2021-10-21 19:11:32,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:11:32,849 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 99 transitions. [2021-10-21 19:11:32,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:11:32,850 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 99 transitions. [2021-10-21 19:11:32,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-10-21 19:11:32,850 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:11:32,851 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:11:32,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-21 19:11:32,851 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:11:32,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:11:32,852 INFO L82 PathProgramCache]: Analyzing trace with hash 238121238, now seen corresponding path program 1 times [2021-10-21 19:11:32,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:11:32,852 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754507787] [2021-10-21 19:11:32,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:11:32,853 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:11:32,890 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:11:32,893 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [765902947] [2021-10-21 19:11:32,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:11:32,893 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:11:32,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64a95c-d05e-413a-8395-d00d62df5a8e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:11:32,899 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64a95c-d05e-413a-8395-d00d62df5a8e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:11:32,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64a95c-d05e-413a-8395-d00d62df5a8e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-21 19:11:33,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:33,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-21 19:11:33,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:11:33,247 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-10-21 19:11:33,248 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:11:33,248 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754507787] [2021-10-21 19:11:33,248 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:11:33,248 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765902947] [2021-10-21 19:11:33,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765902947] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:11:33,249 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:11:33,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-10-21 19:11:33,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455901918] [2021-10-21 19:11:33,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-21 19:11:33,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:11:33,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-21 19:11:33,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-10-21 19:11:33,256 INFO L87 Difference]: Start difference. First operand 83 states and 99 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:11:33,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:11:33,291 INFO L93 Difference]: Finished difference Result 157 states and 189 transitions. [2021-10-21 19:11:33,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-21 19:11:33,292 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-10-21 19:11:33,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:11:33,293 INFO L225 Difference]: With dead ends: 157 [2021-10-21 19:11:33,294 INFO L226 Difference]: Without dead ends: 85 [2021-10-21 19:11:33,297 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.7ms TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-10-21 19:11:33,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-10-21 19:11:33,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2021-10-21 19:11:33,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.2023809523809523) internal successors, (101), 84 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:11:33,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 101 transitions. [2021-10-21 19:11:33,335 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 101 transitions. Word has length 54 [2021-10-21 19:11:33,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:11:33,335 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 101 transitions. [2021-10-21 19:11:33,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:11:33,336 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 101 transitions. [2021-10-21 19:11:33,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-10-21 19:11:33,337 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:11:33,337 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:11:33,370 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64a95c-d05e-413a-8395-d00d62df5a8e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-21 19:11:33,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64a95c-d05e-413a-8395-d00d62df5a8e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-10-21 19:11:33,538 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:11:33,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:11:33,539 INFO L82 PathProgramCache]: Analyzing trace with hash -428363624, now seen corresponding path program 2 times [2021-10-21 19:11:33,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:11:33,539 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588659338] [2021-10-21 19:11:33,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:11:33,539 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:11:33,556 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:11:33,557 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1882229405] [2021-10-21 19:11:33,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:11:33,557 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:11:33,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64a95c-d05e-413a-8395-d00d62df5a8e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:11:33,559 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64a95c-d05e-413a-8395-d00d62df5a8e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:11:33,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64a95c-d05e-413a-8395-d00d62df5a8e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-21 19:11:33,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:11:33,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:11:33,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-21 19:11:33,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:11:33,913 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-10-21 19:11:33,913 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:11:33,913 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588659338] [2021-10-21 19:11:33,913 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:11:33,914 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882229405] [2021-10-21 19:11:33,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882229405] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:11:33,914 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:11:33,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-10-21 19:11:33,915 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201033159] [2021-10-21 19:11:33,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-21 19:11:33,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:11:33,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-21 19:11:33,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:11:33,916 INFO L87 Difference]: Start difference. First operand 85 states and 101 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:11:33,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:11:33,978 INFO L93 Difference]: Finished difference Result 166 states and 202 transitions. [2021-10-21 19:11:33,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-21 19:11:33,979 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-10-21 19:11:33,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:11:33,980 INFO L225 Difference]: With dead ends: 166 [2021-10-21 19:11:33,981 INFO L226 Difference]: Without dead ends: 100 [2021-10-21 19:11:33,982 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.2ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:11:33,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-10-21 19:11:33,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2021-10-21 19:11:33,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.1717171717171717) internal successors, (116), 99 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:11:33,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 116 transitions. [2021-10-21 19:11:33,989 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 116 transitions. Word has length 56 [2021-10-21 19:11:33,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:11:33,990 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 116 transitions. [2021-10-21 19:11:33,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:11:33,991 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 116 transitions. [2021-10-21 19:11:33,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-10-21 19:11:33,992 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:11:33,993 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:11:34,037 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64a95c-d05e-413a-8395-d00d62df5a8e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-21 19:11:34,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64a95c-d05e-413a-8395-d00d62df5a8e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:11:34,206 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:11:34,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:11:34,207 INFO L82 PathProgramCache]: Analyzing trace with hash 35998627, now seen corresponding path program 3 times [2021-10-21 19:11:34,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:11:34,207 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469243149] [2021-10-21 19:11:34,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:11:34,207 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:11:34,238 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:11:34,239 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [757831177] [2021-10-21 19:11:34,239 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 19:11:34,239 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:11:34,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64a95c-d05e-413a-8395-d00d62df5a8e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:11:34,255 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64a95c-d05e-413a-8395-d00d62df5a8e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:11:34,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64a95c-d05e-413a-8395-d00d62df5a8e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-21 19:11:34,449 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-21 19:11:34,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:11:34,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-21 19:11:34,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:11:34,636 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-10-21 19:11:34,639 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:11:34,639 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469243149] [2021-10-21 19:11:34,639 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:11:34,640 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757831177] [2021-10-21 19:11:34,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757831177] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:11:34,640 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:11:34,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:11:34,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835095964] [2021-10-21 19:11:34,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:11:34,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:11:34,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:11:34,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:11:34,642 INFO L87 Difference]: Start difference. First operand 100 states and 116 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:11:34,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:11:34,671 INFO L93 Difference]: Finished difference Result 132 states and 154 transitions. [2021-10-21 19:11:34,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:11:34,672 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-10-21 19:11:34,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:11:34,673 INFO L225 Difference]: With dead ends: 132 [2021-10-21 19:11:34,673 INFO L226 Difference]: Without dead ends: 75 [2021-10-21 19:11:34,674 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.4ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:11:34,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-10-21 19:11:34,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 66. [2021-10-21 19:11:34,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.123076923076923) internal successors, (73), 65 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:11:34,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 73 transitions. [2021-10-21 19:11:34,679 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 73 transitions. Word has length 65 [2021-10-21 19:11:34,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:11:34,679 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 73 transitions. [2021-10-21 19:11:34,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:11:34,680 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 73 transitions. [2021-10-21 19:11:34,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-10-21 19:11:34,681 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:11:34,681 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:11:34,724 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64a95c-d05e-413a-8395-d00d62df5a8e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-21 19:11:34,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64a95c-d05e-413a-8395-d00d62df5a8e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-10-21 19:11:34,894 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:11:34,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:11:34,895 INFO L82 PathProgramCache]: Analyzing trace with hash 1841436961, now seen corresponding path program 1 times [2021-10-21 19:11:34,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:11:34,895 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414806570] [2021-10-21 19:11:34,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:11:34,896 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:11:34,912 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:11:34,912 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1103795975] [2021-10-21 19:11:34,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:11:34,912 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:11:34,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64a95c-d05e-413a-8395-d00d62df5a8e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:11:34,914 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64a95c-d05e-413a-8395-d00d62df5a8e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:11:34,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64a95c-d05e-413a-8395-d00d62df5a8e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-21 19:11:35,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:11:35,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-21 19:11:35,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:11:35,317 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-10-21 19:11:35,317 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:11:35,318 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414806570] [2021-10-21 19:11:35,318 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:11:35,318 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103795975] [2021-10-21 19:11:35,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103795975] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:11:35,318 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:11:35,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-10-21 19:11:35,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689757133] [2021-10-21 19:11:35,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-21 19:11:35,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:11:35,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-21 19:11:35,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-10-21 19:11:35,321 INFO L87 Difference]: Start difference. First operand 66 states and 73 transitions. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:11:35,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:11:35,434 INFO L93 Difference]: Finished difference Result 114 states and 131 transitions. [2021-10-21 19:11:35,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-21 19:11:35,435 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-10-21 19:11:35,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:11:35,436 INFO L225 Difference]: With dead ends: 114 [2021-10-21 19:11:35,436 INFO L226 Difference]: Without dead ends: 75 [2021-10-21 19:11:35,436 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.3ms TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-10-21 19:11:35,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-10-21 19:11:35,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2021-10-21 19:11:35,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.1486486486486487) internal successors, (85), 74 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:11:35,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 85 transitions. [2021-10-21 19:11:35,441 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 85 transitions. Word has length 65 [2021-10-21 19:11:35,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:11:35,442 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 85 transitions. [2021-10-21 19:11:35,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:11:35,442 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 85 transitions. [2021-10-21 19:11:35,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-10-21 19:11:35,443 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:11:35,443 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:11:35,486 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64a95c-d05e-413a-8395-d00d62df5a8e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-21 19:11:35,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64a95c-d05e-413a-8395-d00d62df5a8e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-10-21 19:11:35,658 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:11:35,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:11:35,659 INFO L82 PathProgramCache]: Analyzing trace with hash -484525568, now seen corresponding path program 2 times [2021-10-21 19:11:35,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:11:35,659 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514527932] [2021-10-21 19:11:35,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:11:35,659 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:11:35,675 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:11:35,675 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1663098276] [2021-10-21 19:11:35,675 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:11:35,676 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:11:35,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64a95c-d05e-413a-8395-d00d62df5a8e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:11:35,685 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64a95c-d05e-413a-8395-d00d62df5a8e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:11:35,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64a95c-d05e-413a-8395-d00d62df5a8e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-21 19:11:35,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:11:35,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:11:35,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-21 19:11:35,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:11:36,127 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2021-10-21 19:11:36,127 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:11:36,128 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514527932] [2021-10-21 19:11:36,128 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:11:36,128 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663098276] [2021-10-21 19:11:36,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663098276] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:11:36,128 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:11:36,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2021-10-21 19:11:36,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35050747] [2021-10-21 19:11:36,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:11:36,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:11:36,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:11:36,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:11:36,131 INFO L87 Difference]: Start difference. First operand 75 states and 85 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:11:36,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:11:36,151 INFO L93 Difference]: Finished difference Result 100 states and 113 transitions. [2021-10-21 19:11:36,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:11:36,154 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-10-21 19:11:36,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:11:36,155 INFO L225 Difference]: With dead ends: 100 [2021-10-21 19:11:36,155 INFO L226 Difference]: Without dead ends: 78 [2021-10-21 19:11:36,156 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.9ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:11:36,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-10-21 19:11:36,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2021-10-21 19:11:36,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.144736842105263) internal successors, (87), 76 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:11:36,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 87 transitions. [2021-10-21 19:11:36,162 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 87 transitions. Word has length 74 [2021-10-21 19:11:36,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:11:36,162 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 87 transitions. [2021-10-21 19:11:36,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:11:36,163 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 87 transitions. [2021-10-21 19:11:36,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-10-21 19:11:36,164 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:11:36,164 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:11:36,208 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64a95c-d05e-413a-8395-d00d62df5a8e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-21 19:11:36,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64a95c-d05e-413a-8395-d00d62df5a8e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-10-21 19:11:36,391 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:11:36,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:11:36,391 INFO L82 PathProgramCache]: Analyzing trace with hash 1416102914, now seen corresponding path program 3 times [2021-10-21 19:11:36,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:11:36,391 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340227787] [2021-10-21 19:11:36,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:11:36,392 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:11:36,407 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:11:36,407 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1237368530] [2021-10-21 19:11:36,408 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 19:11:36,408 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:11:36,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64a95c-d05e-413a-8395-d00d62df5a8e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:11:36,410 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64a95c-d05e-413a-8395-d00d62df5a8e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:11:36,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64a95c-d05e-413a-8395-d00d62df5a8e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-21 19:11:36,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-21 19:11:36,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:11:36,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-21 19:11:36,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:11:37,232 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2021-10-21 19:11:37,232 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:11:37,232 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340227787] [2021-10-21 19:11:37,232 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:11:37,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237368530] [2021-10-21 19:11:37,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237368530] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:11:37,233 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:11:37,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-10-21 19:11:37,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567853820] [2021-10-21 19:11:37,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-21 19:11:37,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:11:37,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-21 19:11:37,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:11:37,235 INFO L87 Difference]: Start difference. First operand 77 states and 87 transitions. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:11:37,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:11:37,257 INFO L93 Difference]: Finished difference Result 102 states and 115 transitions. [2021-10-21 19:11:37,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-21 19:11:37,258 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-10-21 19:11:37,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:11:37,259 INFO L225 Difference]: With dead ends: 102 [2021-10-21 19:11:37,259 INFO L226 Difference]: Without dead ends: 80 [2021-10-21 19:11:37,259 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.2ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:11:37,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-10-21 19:11:37,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2021-10-21 19:11:37,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.141025641025641) internal successors, (89), 78 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:11:37,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 89 transitions. [2021-10-21 19:11:37,265 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 89 transitions. Word has length 76 [2021-10-21 19:11:37,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:11:37,265 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 89 transitions. [2021-10-21 19:11:37,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:11:37,266 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 89 transitions. [2021-10-21 19:11:37,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-10-21 19:11:37,267 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:11:37,267 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:11:37,311 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64a95c-d05e-413a-8395-d00d62df5a8e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-21 19:11:37,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64a95c-d05e-413a-8395-d00d62df5a8e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:11:37,494 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:11:37,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:11:37,495 INFO L82 PathProgramCache]: Analyzing trace with hash -1735993980, now seen corresponding path program 4 times [2021-10-21 19:11:37,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:11:37,495 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250885314] [2021-10-21 19:11:37,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:11:37,495 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:11:37,510 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:11:37,510 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [258822245] [2021-10-21 19:11:37,511 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-21 19:11:37,511 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:11:37,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64a95c-d05e-413a-8395-d00d62df5a8e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:11:37,530 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64a95c-d05e-413a-8395-d00d62df5a8e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:11:37,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64a95c-d05e-413a-8395-d00d62df5a8e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-21 19:11:37,814 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-21 19:11:37,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:11:37,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-21 19:11:37,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:11:38,047 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2021-10-21 19:11:38,048 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:11:38,048 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250885314] [2021-10-21 19:11:38,048 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:11:38,048 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258822245] [2021-10-21 19:11:38,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258822245] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:11:38,048 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:11:38,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-10-21 19:11:38,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87569993] [2021-10-21 19:11:38,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 19:11:38,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:11:38,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 19:11:38,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-10-21 19:11:38,050 INFO L87 Difference]: Start difference. First operand 79 states and 89 transitions. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:11:38,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:11:38,093 INFO L93 Difference]: Finished difference Result 103 states and 116 transitions. [2021-10-21 19:11:38,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 19:11:38,094 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-10-21 19:11:38,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:11:38,095 INFO L225 Difference]: With dead ends: 103 [2021-10-21 19:11:38,095 INFO L226 Difference]: Without dead ends: 81 [2021-10-21 19:11:38,096 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.4ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-10-21 19:11:38,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-10-21 19:11:38,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2021-10-21 19:11:38,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.1375) internal successors, (91), 80 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:11:38,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 91 transitions. [2021-10-21 19:11:38,101 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 91 transitions. Word has length 78 [2021-10-21 19:11:38,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:11:38,102 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 91 transitions. [2021-10-21 19:11:38,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:11:38,102 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 91 transitions. [2021-10-21 19:11:38,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-10-21 19:11:38,103 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:11:38,103 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:11:38,143 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64a95c-d05e-413a-8395-d00d62df5a8e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-21 19:11:38,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64a95c-d05e-413a-8395-d00d62df5a8e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:11:38,322 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:11:38,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:11:38,323 INFO L82 PathProgramCache]: Analyzing trace with hash 1345801862, now seen corresponding path program 5 times [2021-10-21 19:11:38,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:11:38,323 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657630455] [2021-10-21 19:11:38,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:11:38,323 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:11:38,347 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:11:38,347 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1202375502] [2021-10-21 19:11:38,348 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-21 19:11:38,348 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:11:38,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64a95c-d05e-413a-8395-d00d62df5a8e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:11:38,360 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64a95c-d05e-413a-8395-d00d62df5a8e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:11:38,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64a95c-d05e-413a-8395-d00d62df5a8e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-21 19:11:39,000 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-10-21 19:11:39,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-10-21 19:11:39,000 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 19:11:39,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:11:39,269 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 19:11:39,269 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-21 19:11:39,271 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-21 19:11:39,320 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64a95c-d05e-413a-8395-d00d62df5a8e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-21 19:11:39,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64a95c-d05e-413a-8395-d00d62df5a8e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-10-21 19:11:39,506 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-21 19:11:39,624 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.10 07:11:39 BoogieIcfgContainer [2021-10-21 19:11:39,624 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-21 19:11:39,625 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-21 19:11:39,625 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-21 19:11:39,626 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-21 19:11:39,626 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:11:27" (3/4) ... [2021-10-21 19:11:39,628 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-21 19:11:39,718 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64a95c-d05e-413a-8395-d00d62df5a8e/bin/uautomizer-j4sWxH34Be/witness.graphml [2021-10-21 19:11:39,718 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-21 19:11:39,720 INFO L168 Benchmark]: Toolchain (without parser) took 13045.13 ms. Allocated memory was 96.5 MB in the beginning and 146.8 MB in the end (delta: 50.3 MB). Free memory was 55.7 MB in the beginning and 87.2 MB in the end (delta: -31.5 MB). Peak memory consumption was 17.9 MB. Max. memory is 16.1 GB. [2021-10-21 19:11:39,721 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 96.5 MB. Free memory is still 71.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 19:11:39,721 INFO L168 Benchmark]: CACSL2BoogieTranslator took 325.01 ms. Allocated memory is still 96.5 MB. Free memory was 55.4 MB in the beginning and 71.3 MB in the end (delta: -15.9 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-21 19:11:39,722 INFO L168 Benchmark]: Boogie Procedure Inliner took 49.02 ms. Allocated memory is still 96.5 MB. Free memory was 71.3 MB in the beginning and 69.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-21 19:11:39,722 INFO L168 Benchmark]: Boogie Preprocessor took 41.08 ms. Allocated memory is still 96.5 MB. Free memory was 69.2 MB in the beginning and 68.1 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 19:11:39,723 INFO L168 Benchmark]: RCFGBuilder took 477.73 ms. Allocated memory is still 96.5 MB. Free memory was 68.1 MB in the beginning and 55.1 MB in the end (delta: 13.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-21 19:11:39,723 INFO L168 Benchmark]: TraceAbstraction took 12050.78 ms. Allocated memory was 96.5 MB in the beginning and 146.8 MB in the end (delta: 50.3 MB). Free memory was 54.9 MB in the beginning and 94.6 MB in the end (delta: -39.6 MB). Peak memory consumption was 13.9 MB. Max. memory is 16.1 GB. [2021-10-21 19:11:39,724 INFO L168 Benchmark]: Witness Printer took 93.48 ms. Allocated memory is still 146.8 MB. Free memory was 94.6 MB in the beginning and 87.2 MB in the end (delta: 7.3 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-21 19:11:39,727 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 96.5 MB. Free memory is still 71.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 325.01 ms. Allocated memory is still 96.5 MB. Free memory was 55.4 MB in the beginning and 71.3 MB in the end (delta: -15.9 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 49.02 ms. Allocated memory is still 96.5 MB. Free memory was 71.3 MB in the beginning and 69.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 41.08 ms. Allocated memory is still 96.5 MB. Free memory was 69.2 MB in the beginning and 68.1 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 477.73 ms. Allocated memory is still 96.5 MB. Free memory was 68.1 MB in the beginning and 55.1 MB in the end (delta: 13.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 12050.78 ms. Allocated memory was 96.5 MB in the beginning and 146.8 MB in the end (delta: 50.3 MB). Free memory was 54.9 MB in the beginning and 94.6 MB in the end (delta: -39.6 MB). Peak memory consumption was 13.9 MB. Max. memory is 16.1 GB. * Witness Printer took 93.48 ms. Allocated memory is still 146.8 MB. Free memory was 94.6 MB in the beginning and 87.2 MB in the end (delta: 7.3 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 61]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L42] int x[5]; [L16] int i; [L17] i = 0 [L17] COND TRUE i < 5 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 5 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 5 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 5 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 5 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND FALSE !(i < 5) [L44] int temp; [L45] int ret; [L46] int ret2; [L47] int ret5; [L24] int i; [L25] long long ret; [L26] ret = 0 [L27] int cnt = 0; [L28] i = 0 [L28] COND TRUE i < 5 [L29] COND FALSE !(i > 5/2) [L28] i++ [L28] COND TRUE i < 5 [L29] COND FALSE !(i > 5/2) [L28] i++ [L28] COND TRUE i < 5 [L29] COND FALSE !(i > 5/2) [L28] i++ [L28] COND TRUE i < 5 [L29] COND TRUE i > 5/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 5 [L29] COND TRUE i > 5/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND FALSE !(i < 5) [L34] COND TRUE cnt !=0 [L35] return ret / cnt; [L49] ret = rangesum(x) [L51] EXPR x[0] [L51] temp=x[0] [L51] EXPR x[1] [L51] x[0] = x[1] [L51] x[1] = temp [L24] int i; [L25] long long ret; [L26] ret = 0 [L27] int cnt = 0; [L28] i = 0 [L28] COND TRUE i < 5 [L29] COND FALSE !(i > 5/2) [L28] i++ [L28] COND TRUE i < 5 [L29] COND FALSE !(i > 5/2) [L28] i++ [L28] COND TRUE i < 5 [L29] COND FALSE !(i > 5/2) [L28] i++ [L28] COND TRUE i < 5 [L29] COND TRUE i > 5/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 5 [L29] COND TRUE i > 5/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND FALSE !(i < 5) [L34] COND TRUE cnt !=0 [L35] return ret / cnt; [L52] ret2 = rangesum(x) [L53] EXPR x[0] [L53] temp=x[0] [L54] int i =0 ; [L54] COND TRUE i<5 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<5 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<5 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<5 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND FALSE !(i<5 -1) [L57] x[5 -1] = temp [L24] int i; [L25] long long ret; [L26] ret = 0 [L27] int cnt = 0; [L28] i = 0 [L28] COND TRUE i < 5 [L29] COND FALSE !(i > 5/2) [L28] i++ [L28] COND TRUE i < 5 [L29] COND FALSE !(i > 5/2) [L28] i++ [L28] COND TRUE i < 5 [L29] COND FALSE !(i > 5/2) [L28] i++ [L28] COND TRUE i < 5 [L29] COND TRUE i > 5/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 5 [L29] COND TRUE i > 5/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND FALSE !(i < 5) [L34] COND TRUE cnt !=0 [L35] return ret / cnt; [L58] ret5 = rangesum(x) [L60] COND TRUE ret != ret2 || ret !=ret5 [L61] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 11766.9ms, OverallIterations: 17, TraceHistogramMax: 5, EmptinessCheckTime: 36.0ms, AutomataDifference: 912.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 19.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 490 SDtfs, 244 SDslu, 688 SDs, 0 SdLazy, 364 SolverSat, 115 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 424.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 706 GetRequests, 649 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 258.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=100occurred in iteration=11, InterpolantAutomatonStates: 79, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 220.9ms AutomataMinimizationTime, 16 MinimizatonAttempts, 95 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 242.2ms SsaConstructionTime, 1239.1ms SatisfiabilityAnalysisTime, 2840.5ms InterpolantComputationTime, 1007 NumberOfCodeBlocks, 924 NumberOfCodeBlocksAsserted, 35 NumberOfCheckSat, 905 ConstructedInterpolants, 0 QuantifiedInterpolants, 1203 SizeOfPredicates, 5 NumberOfNonLiveVariables, 2454 ConjunctsInSsa, 63 ConjunctsInUnsatCore, 22 InterpolantComputations, 7 PerfectInterpolantSequences, 765/844 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-10-21 19:11:39,785 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc64a95c-d05e-413a-8395-d00d62df5a8e/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...