./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_valuebound20.c --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_f0ef4f11-eeed-4a1c-b85a-462af0ffa522/bin/uautomizer-j4sWxH34Be/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ef4f11-eeed-4a1c-b85a-462af0ffa522/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_f0ef4f11-eeed-4a1c-b85a-462af0ffa522/bin/uautomizer-j4sWxH34Be/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ef4f11-eeed-4a1c-b85a-462af0ffa522/bin/uautomizer-j4sWxH34Be/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_valuebound20.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ef4f11-eeed-4a1c-b85a-462af0ffa522/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_f0ef4f11-eeed-4a1c-b85a-462af0ffa522/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 cb384ff5c9201b9f90543357d3375f0a0ac9cc5fac01729f538d89799a1d7226 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-e943c26 [2021-10-21 19:55:14,202 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-21 19:55:14,205 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-21 19:55:14,268 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-21 19:55:14,269 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-21 19:55:14,273 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-21 19:55:14,275 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-21 19:55:14,279 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-21 19:55:14,282 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-21 19:55:14,288 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-21 19:55:14,289 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-21 19:55:14,291 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-21 19:55:14,292 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-21 19:55:14,295 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-21 19:55:14,297 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-21 19:55:14,302 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-21 19:55:14,308 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-21 19:55:14,309 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-21 19:55:14,312 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-21 19:55:14,322 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-21 19:55:14,324 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-21 19:55:14,326 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-21 19:55:14,329 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-21 19:55:14,331 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-21 19:55:14,340 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-21 19:55:14,340 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-21 19:55:14,341 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-21 19:55:14,343 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-21 19:55:14,344 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-21 19:55:14,345 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-21 19:55:14,346 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-21 19:55:14,347 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-21 19:55:14,349 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-21 19:55:14,350 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-21 19:55:14,352 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-21 19:55:14,353 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-21 19:55:14,354 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-21 19:55:14,354 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-21 19:55:14,354 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-21 19:55:14,355 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-21 19:55:14,356 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-21 19:55:14,357 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ef4f11-eeed-4a1c-b85a-462af0ffa522/bin/uautomizer-j4sWxH34Be/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-21 19:55:14,403 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-21 19:55:14,404 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-21 19:55:14,404 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-21 19:55:14,405 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-21 19:55:14,413 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-21 19:55:14,413 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-21 19:55:14,414 INFO L138 SettingsManager]: * Use SBE=true [2021-10-21 19:55:14,414 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-21 19:55:14,414 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-21 19:55:14,414 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-21 19:55:14,416 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-21 19:55:14,416 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-21 19:55:14,416 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-21 19:55:14,416 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-21 19:55:14,417 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-21 19:55:14,417 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-21 19:55:14,417 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-21 19:55:14,417 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-21 19:55:14,418 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-21 19:55:14,418 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-21 19:55:14,418 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-21 19:55:14,418 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-21 19:55:14,419 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 19:55:14,419 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-21 19:55:14,419 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-21 19:55:14,419 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-21 19:55:14,420 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-21 19:55:14,420 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-21 19:55:14,420 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-21 19:55:14,422 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-21 19:55:14,422 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-21 19:55:14,422 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-21 19:55:14,423 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_f0ef4f11-eeed-4a1c-b85a-462af0ffa522/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ef4f11-eeed-4a1c-b85a-462af0ffa522/bin/uautomizer-j4sWxH34Be Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cb384ff5c9201b9f90543357d3375f0a0ac9cc5fac01729f538d89799a1d7226 [2021-10-21 19:55:14,715 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-21 19:55:14,736 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-21 19:55:14,738 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-21 19:55:14,739 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-21 19:55:14,740 INFO L275 PluginConnector]: CDTParser initialized [2021-10-21 19:55:14,741 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ef4f11-eeed-4a1c-b85a-462af0ffa522/bin/uautomizer-j4sWxH34Be/../../sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_valuebound20.c [2021-10-21 19:55:14,808 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ef4f11-eeed-4a1c-b85a-462af0ffa522/bin/uautomizer-j4sWxH34Be/data/1ef21fdf7/7b643685c33f46a28adcbe6305706d90/FLAG000bd25c5 [2021-10-21 19:55:15,288 INFO L306 CDTParser]: Found 1 translation units. [2021-10-21 19:55:15,289 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ef4f11-eeed-4a1c-b85a-462af0ffa522/sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_valuebound20.c [2021-10-21 19:55:15,295 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ef4f11-eeed-4a1c-b85a-462af0ffa522/bin/uautomizer-j4sWxH34Be/data/1ef21fdf7/7b643685c33f46a28adcbe6305706d90/FLAG000bd25c5 [2021-10-21 19:55:15,660 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ef4f11-eeed-4a1c-b85a-462af0ffa522/bin/uautomizer-j4sWxH34Be/data/1ef21fdf7/7b643685c33f46a28adcbe6305706d90 [2021-10-21 19:55:15,663 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-21 19:55:15,664 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-21 19:55:15,674 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-21 19:55:15,674 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-21 19:55:15,678 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-21 19:55:15,678 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:55:15" (1/1) ... [2021-10-21 19:55:15,681 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d42e7ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:55:15, skipping insertion in model container [2021-10-21 19:55:15,681 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:55:15" (1/1) ... [2021-10-21 19:55:15,689 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-21 19:55:15,707 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-21 19:55:15,915 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_f0ef4f11-eeed-4a1c-b85a-462af0ffa522/sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_valuebound20.c[597,610] [2021-10-21 19:55:15,931 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:55:15,940 INFO L203 MainTranslator]: Completed pre-run [2021-10-21 19:55:15,953 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_f0ef4f11-eeed-4a1c-b85a-462af0ffa522/sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_valuebound20.c[597,610] [2021-10-21 19:55:15,962 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:55:15,975 INFO L208 MainTranslator]: Completed translation [2021-10-21 19:55:15,976 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:55:15 WrapperNode [2021-10-21 19:55:15,976 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-21 19:55:15,977 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-21 19:55:15,977 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-21 19:55:15,978 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-21 19:55:15,983 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:55:15" (1/1) ... [2021-10-21 19:55:15,990 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:55:15" (1/1) ... [2021-10-21 19:55:16,012 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-21 19:55:16,013 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-21 19:55:16,013 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-21 19:55:16,013 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-21 19:55:16,022 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:55:15" (1/1) ... [2021-10-21 19:55:16,022 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:55:15" (1/1) ... [2021-10-21 19:55:16,024 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:55:15" (1/1) ... [2021-10-21 19:55:16,024 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:55:15" (1/1) ... [2021-10-21 19:55:16,028 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:55:15" (1/1) ... [2021-10-21 19:55:16,032 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:55:15" (1/1) ... [2021-10-21 19:55:16,034 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:55:15" (1/1) ... [2021-10-21 19:55:16,036 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-21 19:55:16,037 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-21 19:55:16,037 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-21 19:55:16,038 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-21 19:55:16,039 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:55:15" (1/1) ... [2021-10-21 19:55:16,047 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 19:55:16,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ef4f11-eeed-4a1c-b85a-462af0ffa522/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:55:16,075 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ef4f11-eeed-4a1c-b85a-462af0ffa522/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-21 19:55:16,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ef4f11-eeed-4a1c-b85a-462af0ffa522/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-21 19:55:16,124 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-21 19:55:16,125 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-21 19:55:16,125 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-21 19:55:16,125 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-21 19:55:16,339 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-21 19:55:16,339 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-10-21 19:55:16,341 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:55:16 BoogieIcfgContainer [2021-10-21 19:55:16,341 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-21 19:55:16,343 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-21 19:55:16,344 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-21 19:55:16,360 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-21 19:55:16,360 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.10 07:55:15" (1/3) ... [2021-10-21 19:55:16,361 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50bc44ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 07:55:16, skipping insertion in model container [2021-10-21 19:55:16,361 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:55:15" (2/3) ... [2021-10-21 19:55:16,362 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50bc44ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 07:55:16, skipping insertion in model container [2021-10-21 19:55:16,362 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:55:16" (3/3) ... [2021-10-21 19:55:16,364 INFO L111 eAbstractionObserver]: Analyzing ICFG bresenham-ll_valuebound20.c [2021-10-21 19:55:16,369 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-21 19:55:16,385 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-10-21 19:55:16,468 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-21 19:55:16,480 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 19:55:16,480 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-10-21 19:55:16,526 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 20 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 19:55:16,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-21 19:55:16,532 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:55:16,532 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:55:16,533 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:55:16,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:55:16,539 INFO L82 PathProgramCache]: Analyzing trace with hash -594062832, now seen corresponding path program 1 times [2021-10-21 19:55:16,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:55:16,564 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083229637] [2021-10-21 19:55:16,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:55:16,565 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:55:16,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:55:16,783 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 19:55:16,783 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:55:16,785 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083229637] [2021-10-21 19:55:16,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083229637] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:55:16,786 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:55:16,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-21 19:55:16,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626719564] [2021-10-21 19:55:16,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-21 19:55:16,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:55:16,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-21 19:55:16,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-21 19:55:16,824 INFO L87 Difference]: Start difference. First operand has 21 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 20 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) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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 19:55:16,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:55:16,845 INFO L93 Difference]: Finished difference Result 39 states and 52 transitions. [2021-10-21 19:55:16,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-21 19:55:16,847 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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 9 [2021-10-21 19:55:16,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:55:16,857 INFO L225 Difference]: With dead ends: 39 [2021-10-21 19:55:16,857 INFO L226 Difference]: Without dead ends: 17 [2021-10-21 19:55:16,861 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-21 19:55:16,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-10-21 19:55:16,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-10-21 19:55:16,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:55:16,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2021-10-21 19:55:16,896 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 9 [2021-10-21 19:55:16,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:55:16,898 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2021-10-21 19:55:16,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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 19:55:16,899 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2021-10-21 19:55:16,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-21 19:55:16,900 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:55:16,900 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:55:16,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-21 19:55:16,901 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:55:16,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:55:16,906 INFO L82 PathProgramCache]: Analyzing trace with hash 1182791572, now seen corresponding path program 1 times [2021-10-21 19:55:16,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:55:16,906 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303815710] [2021-10-21 19:55:16,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:55:16,907 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:55:16,947 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:55:16,949 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [489264836] [2021-10-21 19:55:16,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:55:16,950 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:55:16,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ef4f11-eeed-4a1c-b85a-462af0ffa522/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:55:16,955 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ef4f11-eeed-4a1c-b85a-462af0ffa522/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:55:16,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ef4f11-eeed-4a1c-b85a-462af0ffa522/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-21 19:55:17,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:55:17,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-21 19:55:17,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:55:17,225 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 19:55:17,226 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:55:17,226 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303815710] [2021-10-21 19:55:17,226 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:55:17,227 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489264836] [2021-10-21 19:55:17,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489264836] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:55:17,227 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:55:17,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:55:17,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39905433] [2021-10-21 19:55:17,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:55:17,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:55:17,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:55:17,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:55:17,243 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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 19:55:17,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:55:17,323 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2021-10-21 19:55:17,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-21 19:55:17,324 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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 9 [2021-10-21 19:55:17,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:55:17,325 INFO L225 Difference]: With dead ends: 29 [2021-10-21 19:55:17,325 INFO L226 Difference]: Without dead ends: 23 [2021-10-21 19:55:17,327 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:55:17,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-10-21 19:55:17,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2021-10-21 19:55:17,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:55:17,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2021-10-21 19:55:17,337 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 9 [2021-10-21 19:55:17,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:55:17,337 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2021-10-21 19:55:17,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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 19:55:17,338 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2021-10-21 19:55:17,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-21 19:55:17,339 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:55:17,340 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:55:17,381 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ef4f11-eeed-4a1c-b85a-462af0ffa522/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-21 19:55:17,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ef4f11-eeed-4a1c-b85a-462af0ffa522/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:55:17,570 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:55:17,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:55:17,571 INFO L82 PathProgramCache]: Analyzing trace with hash -2039286562, now seen corresponding path program 1 times [2021-10-21 19:55:17,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:55:17,571 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141004497] [2021-10-21 19:55:17,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:55:17,572 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:55:17,586 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:55:17,587 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1919255148] [2021-10-21 19:55:17,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:55:17,587 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:55:17,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ef4f11-eeed-4a1c-b85a-462af0ffa522/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:55:17,589 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ef4f11-eeed-4a1c-b85a-462af0ffa522/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:55:17,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ef4f11-eeed-4a1c-b85a-462af0ffa522/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-21 19:55:17,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:55:17,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-21 19:55:17,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:55:17,873 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:55:17,874 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:55:17,874 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141004497] [2021-10-21 19:55:17,874 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:55:17,874 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919255148] [2021-10-21 19:55:17,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919255148] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:55:17,879 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:55:17,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-10-21 19:55:17,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490066468] [2021-10-21 19:55:17,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 19:55:17,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:55:17,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 19:55:17,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-21 19:55:17,884 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 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 19:55:17,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:55:17,988 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2021-10-21 19:55:17,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-21 19:55:17,989 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 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 14 [2021-10-21 19:55:17,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:55:17,990 INFO L225 Difference]: With dead ends: 34 [2021-10-21 19:55:17,990 INFO L226 Difference]: Without dead ends: 28 [2021-10-21 19:55:17,991 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 62.0ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-10-21 19:55:17,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-10-21 19:55:17,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2021-10-21 19:55:17,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:55:17,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2021-10-21 19:55:17,996 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 14 [2021-10-21 19:55:17,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:55:17,996 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2021-10-21 19:55:17,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 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 19:55:17,997 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2021-10-21 19:55:17,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-21 19:55:17,998 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:55:17,998 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:55:18,036 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ef4f11-eeed-4a1c-b85a-462af0ffa522/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-21 19:55:18,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ef4f11-eeed-4a1c-b85a-462af0ffa522/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:55:18,214 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:55:18,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:55:18,215 INFO L82 PathProgramCache]: Analyzing trace with hash -2037439520, now seen corresponding path program 1 times [2021-10-21 19:55:18,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:55:18,215 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930246764] [2021-10-21 19:55:18,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:55:18,216 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:55:18,229 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:55:18,230 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [343340668] [2021-10-21 19:55:18,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:55:18,230 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:55:18,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ef4f11-eeed-4a1c-b85a-462af0ffa522/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:55:18,231 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ef4f11-eeed-4a1c-b85a-462af0ffa522/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:55:18,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ef4f11-eeed-4a1c-b85a-462af0ffa522/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-21 19:55:18,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:55:18,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-21 19:55:18,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:55:18,501 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:55:18,502 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:55:18,504 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930246764] [2021-10-21 19:55:18,504 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:55:18,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343340668] [2021-10-21 19:55:18,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343340668] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:55:18,505 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:55:18,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-10-21 19:55:18,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251186424] [2021-10-21 19:55:18,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 19:55:18,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:55:18,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 19:55:18,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-21 19:55:18,510 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 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 19:55:18,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:55:18,633 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2021-10-21 19:55:18,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-21 19:55:18,634 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 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 14 [2021-10-21 19:55:18,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:55:18,635 INFO L225 Difference]: With dead ends: 38 [2021-10-21 19:55:18,635 INFO L226 Difference]: Without dead ends: 36 [2021-10-21 19:55:18,636 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 72.8ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-10-21 19:55:18,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-10-21 19:55:18,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 28. [2021-10-21 19:55:18,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 27 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 19:55:18,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2021-10-21 19:55:18,645 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 14 [2021-10-21 19:55:18,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:55:18,646 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2021-10-21 19:55:18,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 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 19:55:18,646 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2021-10-21 19:55:18,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-21 19:55:18,648 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:55:18,648 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:55:18,686 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ef4f11-eeed-4a1c-b85a-462af0ffa522/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-21 19:55:18,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ef4f11-eeed-4a1c-b85a-462af0ffa522/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:55:18,865 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:55:18,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:55:18,866 INFO L82 PathProgramCache]: Analyzing trace with hash -878006574, now seen corresponding path program 1 times [2021-10-21 19:55:18,866 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:55:18,866 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440238830] [2021-10-21 19:55:18,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:55:18,866 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:55:18,878 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:55:18,879 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1260095900] [2021-10-21 19:55:18,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:55:18,879 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:55:18,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ef4f11-eeed-4a1c-b85a-462af0ffa522/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:55:18,880 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ef4f11-eeed-4a1c-b85a-462af0ffa522/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:55:18,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ef4f11-eeed-4a1c-b85a-462af0ffa522/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-21 19:55:18,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:55:18,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-21 19:55:18,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:55:19,323 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:55:19,324 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:55:19,324 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440238830] [2021-10-21 19:55:19,324 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:55:19,324 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260095900] [2021-10-21 19:55:19,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260095900] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:55:19,325 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:55:19,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-10-21 19:55:19,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082440620] [2021-10-21 19:55:19,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-21 19:55:19,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:55:19,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-21 19:55:19,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-10-21 19:55:19,326 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 10 states, 10 states have (on average 1.7) internal successors, (17), 10 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 19:55:19,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:55:19,502 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2021-10-21 19:55:19,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-21 19:55:19,503 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 10 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 19:55:19,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:55:19,505 INFO L225 Difference]: With dead ends: 37 [2021-10-21 19:55:19,505 INFO L226 Difference]: Without dead ends: 33 [2021-10-21 19:55:19,507 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 178.1ms TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-10-21 19:55:19,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-10-21 19:55:19,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 25. [2021-10-21 19:55:19,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:55:19,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2021-10-21 19:55:19,518 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 17 [2021-10-21 19:55:19,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:55:19,518 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2021-10-21 19:55:19,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 10 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 19:55:19,519 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2021-10-21 19:55:19,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-21 19:55:19,520 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:55:19,520 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:55:19,558 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ef4f11-eeed-4a1c-b85a-462af0ffa522/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-21 19:55:19,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ef4f11-eeed-4a1c-b85a-462af0ffa522/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:55:19,734 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:55:19,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:55:19,734 INFO L82 PathProgramCache]: Analyzing trace with hash -1508067884, now seen corresponding path program 2 times [2021-10-21 19:55:19,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:55:19,734 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14659915] [2021-10-21 19:55:19,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:55:19,735 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:55:19,746 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:55:19,747 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [472826498] [2021-10-21 19:55:19,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:55:19,747 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:55:19,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ef4f11-eeed-4a1c-b85a-462af0ffa522/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:55:19,748 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ef4f11-eeed-4a1c-b85a-462af0ffa522/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:55:19,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ef4f11-eeed-4a1c-b85a-462af0ffa522/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-21 19:55:19,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:55:19,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:55:19,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 36 conjunts are in the unsatisfiable core [2021-10-21 19:55:19,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:55:20,520 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:55:20,521 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:55:20,521 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14659915] [2021-10-21 19:55:20,521 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:55:20,522 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472826498] [2021-10-21 19:55:20,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472826498] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:55:20,522 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:55:20,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-10-21 19:55:20,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957948044] [2021-10-21 19:55:20,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-21 19:55:20,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:55:20,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-21 19:55:20,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-10-21 19:55:20,525 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 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 19:55:21,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:55:21,017 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2021-10-21 19:55:21,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-21 19:55:21,018 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 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 19:55:21,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:55:21,019 INFO L225 Difference]: With dead ends: 43 [2021-10-21 19:55:21,019 INFO L226 Difference]: Without dead ends: 37 [2021-10-21 19:55:21,019 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 505.6ms TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2021-10-21 19:55:21,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-10-21 19:55:21,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2021-10-21 19:55:21,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 29 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 19:55:21,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2021-10-21 19:55:21,025 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 19 [2021-10-21 19:55:21,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:55:21,025 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2021-10-21 19:55:21,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 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 19:55:21,026 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2021-10-21 19:55:21,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-21 19:55:21,026 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:55:21,026 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:55:21,053 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ef4f11-eeed-4a1c-b85a-462af0ffa522/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-21 19:55:21,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ef4f11-eeed-4a1c-b85a-462af0ffa522/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:55:21,238 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:55:21,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:55:21,238 INFO L82 PathProgramCache]: Analyzing trace with hash -1506220842, now seen corresponding path program 1 times [2021-10-21 19:55:21,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:55:21,239 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911943734] [2021-10-21 19:55:21,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:55:21,239 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:55:21,250 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:55:21,250 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1466000263] [2021-10-21 19:55:21,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:55:21,251 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:55:21,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ef4f11-eeed-4a1c-b85a-462af0ffa522/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:55:21,252 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ef4f11-eeed-4a1c-b85a-462af0ffa522/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:55:21,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ef4f11-eeed-4a1c-b85a-462af0ffa522/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-21 19:55:21,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:55:21,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 37 conjunts are in the unsatisfiable core [2021-10-21 19:55:21,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:55:21,815 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:55:21,816 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:55:21,817 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911943734] [2021-10-21 19:55:21,817 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:55:21,818 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466000263] [2021-10-21 19:55:21,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466000263] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:55:21,818 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:55:21,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-10-21 19:55:21,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730767439] [2021-10-21 19:55:21,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-21 19:55:21,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:55:21,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-21 19:55:21,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-10-21 19:55:21,822 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 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 19:55:22,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:55:22,053 INFO L93 Difference]: Finished difference Result 48 states and 55 transitions. [2021-10-21 19:55:22,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-21 19:55:22,053 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 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 19:55:22,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:55:22,054 INFO L225 Difference]: With dead ends: 48 [2021-10-21 19:55:22,054 INFO L226 Difference]: Without dead ends: 37 [2021-10-21 19:55:22,054 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 225.2ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-10-21 19:55:22,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-10-21 19:55:22,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2021-10-21 19:55:22,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 34 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 19:55:22,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2021-10-21 19:55:22,060 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 19 [2021-10-21 19:55:22,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:55:22,060 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2021-10-21 19:55:22,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 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 19:55:22,061 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2021-10-21 19:55:22,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-21 19:55:22,061 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:55:22,062 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:55:22,108 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ef4f11-eeed-4a1c-b85a-462af0ffa522/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-21 19:55:22,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ef4f11-eeed-4a1c-b85a-462af0ffa522/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-10-21 19:55:22,262 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:55:22,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:55:22,263 INFO L82 PathProgramCache]: Analyzing trace with hash -1901094894, now seen corresponding path program 2 times [2021-10-21 19:55:22,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:55:22,263 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730139234] [2021-10-21 19:55:22,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:55:22,263 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:55:22,273 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:55:22,273 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1451968871] [2021-10-21 19:55:22,273 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:55:22,273 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:55:22,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ef4f11-eeed-4a1c-b85a-462af0ffa522/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:55:22,274 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ef4f11-eeed-4a1c-b85a-462af0ffa522/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:55:22,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ef4f11-eeed-4a1c-b85a-462af0ffa522/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-21 19:55:22,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:55:22,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:55:22,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 32 conjunts are in the unsatisfiable core [2021-10-21 19:55:22,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:55:22,667 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:55:22,667 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:55:22,667 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730139234] [2021-10-21 19:55:22,668 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:55:22,668 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451968871] [2021-10-21 19:55:22,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451968871] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:55:22,668 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:55:22,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-10-21 19:55:22,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608846108] [2021-10-21 19:55:22,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-21 19:55:22,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:55:22,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-21 19:55:22,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-10-21 19:55:22,670 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 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 19:55:22,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:55:22,936 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2021-10-21 19:55:22,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-21 19:55:22,936 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 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 19:55:22,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:55:22,937 INFO L225 Difference]: With dead ends: 53 [2021-10-21 19:55:22,937 INFO L226 Difference]: Without dead ends: 51 [2021-10-21 19:55:22,938 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 118.6ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-10-21 19:55:22,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-10-21 19:55:22,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 43. [2021-10-21 19:55:22,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 41 states have (on average 1.146341463414634) internal successors, (47), 42 states have internal predecessors, (47), 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 19:55:22,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2021-10-21 19:55:22,946 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 19 [2021-10-21 19:55:22,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:55:22,946 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2021-10-21 19:55:22,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 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 19:55:22,947 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2021-10-21 19:55:22,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-21 19:55:22,947 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:55:22,948 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:55:22,970 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ef4f11-eeed-4a1c-b85a-462af0ffa522/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-10-21 19:55:23,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ef4f11-eeed-4a1c-b85a-462af0ffa522/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:55:23,154 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:55:23,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:55:23,154 INFO L82 PathProgramCache]: Analyzing trace with hash -1899247852, now seen corresponding path program 2 times [2021-10-21 19:55:23,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:55:23,155 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835876778] [2021-10-21 19:55:23,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:55:23,155 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:55:23,167 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:55:23,167 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [161445555] [2021-10-21 19:55:23,167 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:55:23,167 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:55:23,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ef4f11-eeed-4a1c-b85a-462af0ffa522/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:55:23,168 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ef4f11-eeed-4a1c-b85a-462af0ffa522/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:55:23,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ef4f11-eeed-4a1c-b85a-462af0ffa522/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-21 19:55:23,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:55:23,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:55:23,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 38 conjunts are in the unsatisfiable core [2021-10-21 19:55:23,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:55:23,586 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:55:23,587 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:55:23,587 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835876778] [2021-10-21 19:55:23,587 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:55:23,587 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161445555] [2021-10-21 19:55:23,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161445555] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:55:23,588 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:55:23,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-10-21 19:55:23,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382372059] [2021-10-21 19:55:23,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-21 19:55:23,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:55:23,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-21 19:55:23,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-10-21 19:55:23,590 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 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 19:55:23,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:55:23,806 INFO L93 Difference]: Finished difference Result 56 states and 61 transitions. [2021-10-21 19:55:23,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-21 19:55:23,806 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 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 19:55:23,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:55:23,807 INFO L225 Difference]: With dead ends: 56 [2021-10-21 19:55:23,807 INFO L226 Difference]: Without dead ends: 54 [2021-10-21 19:55:23,807 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 150.7ms TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-10-21 19:55:23,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-10-21 19:55:23,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 43. [2021-10-21 19:55:23,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 41 states have (on average 1.146341463414634) internal successors, (47), 42 states have internal predecessors, (47), 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 19:55:23,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2021-10-21 19:55:23,814 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 19 [2021-10-21 19:55:23,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:55:23,814 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2021-10-21 19:55:23,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 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 19:55:23,814 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2021-10-21 19:55:23,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-21 19:55:23,815 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:55:23,815 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:55:23,854 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ef4f11-eeed-4a1c-b85a-462af0ffa522/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-21 19:55:24,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ef4f11-eeed-4a1c-b85a-462af0ffa522/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:55:24,016 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:55:24,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:55:24,017 INFO L82 PathProgramCache]: Analyzing trace with hash -2074315424, now seen corresponding path program 1 times [2021-10-21 19:55:24,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:55:24,017 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520231543] [2021-10-21 19:55:24,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:55:24,017 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:55:24,028 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:55:24,028 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [107835210] [2021-10-21 19:55:24,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:55:24,029 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:55:24,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ef4f11-eeed-4a1c-b85a-462af0ffa522/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:55:24,030 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ef4f11-eeed-4a1c-b85a-462af0ffa522/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:55:24,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ef4f11-eeed-4a1c-b85a-462af0ffa522/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-21 19:55:24,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:55:24,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-21 19:55:24,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:55:24,405 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:55:24,407 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:55:24,407 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520231543] [2021-10-21 19:55:24,408 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:55:24,408 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107835210] [2021-10-21 19:55:24,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107835210] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:55:24,408 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:55:24,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-10-21 19:55:24,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171774414] [2021-10-21 19:55:24,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-21 19:55:24,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:55:24,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-21 19:55:24,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-21 19:55:24,410 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 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 19:55:24,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:55:24,524 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2021-10-21 19:55:24,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-21 19:55:24,525 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-21 19:55:24,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:55:24,525 INFO L225 Difference]: With dead ends: 53 [2021-10-21 19:55:24,526 INFO L226 Difference]: Without dead ends: 49 [2021-10-21 19:55:24,526 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 37.4ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-21 19:55:24,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-10-21 19:55:24,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2021-10-21 19:55:24,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 41 states have (on average 1.146341463414634) internal successors, (47), 42 states have internal predecessors, (47), 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 19:55:24,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2021-10-21 19:55:24,538 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 22 [2021-10-21 19:55:24,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:55:24,538 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2021-10-21 19:55:24,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 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 19:55:24,538 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2021-10-21 19:55:24,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-21 19:55:24,542 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:55:24,542 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:55:24,577 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ef4f11-eeed-4a1c-b85a-462af0ffa522/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-21 19:55:24,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ef4f11-eeed-4a1c-b85a-462af0ffa522/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-10-21 19:55:24,743 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:55:24,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:55:24,743 INFO L82 PathProgramCache]: Analyzing trace with hash 1411305246, now seen corresponding path program 2 times [2021-10-21 19:55:24,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:55:24,744 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107178166] [2021-10-21 19:55:24,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:55:24,744 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:55:24,755 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:55:24,755 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [169490569] [2021-10-21 19:55:24,755 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:55:24,755 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:55:24,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ef4f11-eeed-4a1c-b85a-462af0ffa522/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:55:24,756 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ef4f11-eeed-4a1c-b85a-462af0ffa522/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:55:24,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ef4f11-eeed-4a1c-b85a-462af0ffa522/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-21 19:55:24,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:55:24,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:55:24,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 30 conjunts are in the unsatisfiable core [2021-10-21 19:55:24,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:55:25,326 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:55:25,327 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:55:25,327 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107178166] [2021-10-21 19:55:25,327 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:55:25,327 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169490569] [2021-10-21 19:55:25,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169490569] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:55:25,328 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:55:25,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-10-21 19:55:25,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573118894] [2021-10-21 19:55:25,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-21 19:55:25,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:55:25,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-21 19:55:25,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-10-21 19:55:25,330 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 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 19:55:25,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:55:25,578 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2021-10-21 19:55:25,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-21 19:55:25,579 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-21 19:55:25,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:55:25,580 INFO L225 Difference]: With dead ends: 53 [2021-10-21 19:55:25,580 INFO L226 Difference]: Without dead ends: 49 [2021-10-21 19:55:25,580 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 238.1ms TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-10-21 19:55:25,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-10-21 19:55:25,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 40. [2021-10-21 19:55:25,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 39 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 19:55:25,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2021-10-21 19:55:25,587 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 22 [2021-10-21 19:55:25,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:55:25,587 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2021-10-21 19:55:25,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 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 19:55:25,588 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2021-10-21 19:55:25,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-21 19:55:25,588 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:55:25,588 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:55:25,629 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ef4f11-eeed-4a1c-b85a-462af0ffa522/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-21 19:55:25,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ef4f11-eeed-4a1c-b85a-462af0ffa522/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:55:25,789 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:55:25,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:55:25,789 INFO L82 PathProgramCache]: Analyzing trace with hash 777199262, now seen corresponding path program 3 times [2021-10-21 19:55:25,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:55:25,790 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063782742] [2021-10-21 19:55:25,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:55:25,790 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:55:25,799 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:55:25,800 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1606230974] [2021-10-21 19:55:25,800 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 19:55:25,800 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:55:25,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ef4f11-eeed-4a1c-b85a-462af0ffa522/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:55:25,804 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ef4f11-eeed-4a1c-b85a-462af0ffa522/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:55:25,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ef4f11-eeed-4a1c-b85a-462af0ffa522/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-21 19:55:25,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-21 19:55:25,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:55:25,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-21 19:55:25,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:55:26,166 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-21 19:55:26,167 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:55:26,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063782742] [2021-10-21 19:55:26,167 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:55:26,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606230974] [2021-10-21 19:55:26,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606230974] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:55:26,167 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:55:26,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-10-21 19:55:26,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877328656] [2021-10-21 19:55:26,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-21 19:55:26,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:55:26,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-21 19:55:26,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-10-21 19:55:26,169 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 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 19:55:26,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:55:26,294 INFO L93 Difference]: Finished difference Result 57 states and 62 transitions. [2021-10-21 19:55:26,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-21 19:55:26,295 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 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 24 [2021-10-21 19:55:26,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:55:26,296 INFO L225 Difference]: With dead ends: 57 [2021-10-21 19:55:26,296 INFO L226 Difference]: Without dead ends: 51 [2021-10-21 19:55:26,296 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 82.3ms TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-10-21 19:55:26,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-10-21 19:55:26,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 45. [2021-10-21 19:55:26,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 43 states have (on average 1.1627906976744187) internal successors, (50), 44 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:55:26,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50 transitions. [2021-10-21 19:55:26,311 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 50 transitions. Word has length 24 [2021-10-21 19:55:26,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:55:26,312 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 50 transitions. [2021-10-21 19:55:26,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 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 19:55:26,312 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 50 transitions. [2021-10-21 19:55:26,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-21 19:55:26,313 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:55:26,313 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:55:26,348 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ef4f11-eeed-4a1c-b85a-462af0ffa522/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-21 19:55:26,513 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ef4f11-eeed-4a1c-b85a-462af0ffa522/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:55:26,513 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:55:26,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:55:26,514 INFO L82 PathProgramCache]: Analyzing trace with hash 779046304, now seen corresponding path program 3 times [2021-10-21 19:55:26,514 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:55:26,514 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4760417] [2021-10-21 19:55:26,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:55:26,514 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:55:26,525 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:55:26,525 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [317385035] [2021-10-21 19:55:26,525 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 19:55:26,526 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:55:26,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ef4f11-eeed-4a1c-b85a-462af0ffa522/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:55:26,527 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ef4f11-eeed-4a1c-b85a-462af0ffa522/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:55:26,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ef4f11-eeed-4a1c-b85a-462af0ffa522/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-21 19:55:26,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-21 19:55:26,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:55:26,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2021-10-21 19:55:26,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:55:26,992 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-21 19:55:26,993 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:55:26,993 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4760417] [2021-10-21 19:55:26,993 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:55:26,993 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317385035] [2021-10-21 19:55:26,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317385035] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:55:26,993 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:55:26,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-10-21 19:55:26,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929318883] [2021-10-21 19:55:26,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-21 19:55:26,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:55:26,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-21 19:55:26,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-10-21 19:55:26,995 INFO L87 Difference]: Start difference. First operand 45 states and 50 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:55:27,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:55:27,112 INFO L93 Difference]: Finished difference Result 62 states and 68 transitions. [2021-10-21 19:55:27,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-21 19:55:27,112 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-21 19:55:27,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:55:27,115 INFO L225 Difference]: With dead ends: 62 [2021-10-21 19:55:27,115 INFO L226 Difference]: Without dead ends: 60 [2021-10-21 19:55:27,115 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 125.8ms TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-10-21 19:55:27,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-10-21 19:55:27,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2021-10-21 19:55:27,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 52 states have (on average 1.1730769230769231) internal successors, (61), 53 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:55:27,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2021-10-21 19:55:27,128 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 24 [2021-10-21 19:55:27,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:55:27,128 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2021-10-21 19:55:27,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:55:27,129 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2021-10-21 19:55:27,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-21 19:55:27,132 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:55:27,133 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:55:27,167 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ef4f11-eeed-4a1c-b85a-462af0ffa522/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-21 19:55:27,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ef4f11-eeed-4a1c-b85a-462af0ffa522/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:55:27,351 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:55:27,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:55:27,351 INFO L82 PathProgramCache]: Analyzing trace with hash -500817374, now seen corresponding path program 4 times [2021-10-21 19:55:27,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:55:27,352 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596412674] [2021-10-21 19:55:27,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:55:27,352 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:55:27,362 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:55:27,362 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1854917155] [2021-10-21 19:55:27,362 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-21 19:55:27,362 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:55:27,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ef4f11-eeed-4a1c-b85a-462af0ffa522/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:55:27,370 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ef4f11-eeed-4a1c-b85a-462af0ffa522/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:55:27,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ef4f11-eeed-4a1c-b85a-462af0ffa522/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-21 19:55:27,569 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-21 19:55:27,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:55:27,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 32 conjunts are in the unsatisfiable core [2021-10-21 19:55:27,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:55:27,980 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:55:27,980 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:55:27,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596412674] [2021-10-21 19:55:27,980 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:55:27,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854917155] [2021-10-21 19:55:27,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854917155] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:55:27,981 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:55:27,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-10-21 19:55:27,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841117820] [2021-10-21 19:55:27,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-21 19:55:27,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:55:27,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-21 19:55:27,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-10-21 19:55:27,982 INFO L87 Difference]: Start difference. First operand 54 states and 61 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:55:28,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:55:28,298 INFO L93 Difference]: Finished difference Result 82 states and 95 transitions. [2021-10-21 19:55:28,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-21 19:55:28,298 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-21 19:55:28,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:55:28,299 INFO L225 Difference]: With dead ends: 82 [2021-10-21 19:55:28,299 INFO L226 Difference]: Without dead ends: 66 [2021-10-21 19:55:28,299 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 233.8ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-10-21 19:55:28,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-10-21 19:55:28,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 58. [2021-10-21 19:55:28,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 56 states have (on average 1.1607142857142858) internal successors, (65), 57 states have internal predecessors, (65), 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 19:55:28,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 65 transitions. [2021-10-21 19:55:28,309 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 65 transitions. Word has length 24 [2021-10-21 19:55:28,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:55:28,310 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 65 transitions. [2021-10-21 19:55:28,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:55:28,310 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 65 transitions. [2021-10-21 19:55:28,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-21 19:55:28,311 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:55:28,311 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:55:28,348 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ef4f11-eeed-4a1c-b85a-462af0ffa522/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-21 19:55:28,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ef4f11-eeed-4a1c-b85a-462af0ffa522/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:55:28,526 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:55:28,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:55:28,526 INFO L82 PathProgramCache]: Analyzing trace with hash -895691426, now seen corresponding path program 5 times [2021-10-21 19:55:28,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:55:28,526 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571024311] [2021-10-21 19:55:28,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:55:28,526 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:55:28,536 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:55:28,536 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1607797525] [2021-10-21 19:55:28,536 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-21 19:55:28,536 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:55:28,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ef4f11-eeed-4a1c-b85a-462af0ffa522/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:55:28,537 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ef4f11-eeed-4a1c-b85a-462af0ffa522/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:55:28,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ef4f11-eeed-4a1c-b85a-462af0ffa522/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-21 19:55:28,828 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-21 19:55:28,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:55:28,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 46 conjunts are in the unsatisfiable core [2021-10-21 19:55:28,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:55:35,049 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:55:35,049 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:55:35,049 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571024311] [2021-10-21 19:55:35,049 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:55:35,050 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607797525] [2021-10-21 19:55:35,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607797525] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:55:35,050 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:55:35,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-10-21 19:55:35,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913136913] [2021-10-21 19:55:35,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-21 19:55:35,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:55:35,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-21 19:55:35,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-10-21 19:55:35,052 INFO L87 Difference]: Start difference. First operand 58 states and 65 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:55:41,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:55:41,754 INFO L93 Difference]: Finished difference Result 72 states and 81 transitions. [2021-10-21 19:55:41,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-21 19:55:41,755 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-21 19:55:41,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:55:41,758 INFO L225 Difference]: With dead ends: 72 [2021-10-21 19:55:41,758 INFO L226 Difference]: Without dead ends: 70 [2021-10-21 19:55:41,762 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 7448.2ms TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-10-21 19:55:41,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-10-21 19:55:41,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 59. [2021-10-21 19:55:41,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 57 states have (on average 1.1754385964912282) internal successors, (67), 58 states have internal predecessors, (67), 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 19:55:41,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 67 transitions. [2021-10-21 19:55:41,781 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 67 transitions. Word has length 24 [2021-10-21 19:55:41,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:55:41,781 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 67 transitions. [2021-10-21 19:55:41,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:55:41,782 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 67 transitions. [2021-10-21 19:55:41,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-21 19:55:41,783 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:55:41,783 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:55:41,788 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ef4f11-eeed-4a1c-b85a-462af0ffa522/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-10-21 19:55:41,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ef4f11-eeed-4a1c-b85a-462af0ffa522/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-10-21 19:55:41,988 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:55:41,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:55:41,989 INFO L82 PathProgramCache]: Analyzing trace with hash -893844384, now seen corresponding path program 3 times [2021-10-21 19:55:41,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:55:41,989 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85162493] [2021-10-21 19:55:41,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:55:41,989 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:55:42,003 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:55:42,006 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [203947853] [2021-10-21 19:55:42,006 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 19:55:42,006 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:55:42,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ef4f11-eeed-4a1c-b85a-462af0ffa522/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:55:42,007 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ef4f11-eeed-4a1c-b85a-462af0ffa522/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:55:42,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ef4f11-eeed-4a1c-b85a-462af0ffa522/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-21 19:55:42,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-21 19:55:42,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:55:42,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-21 19:55:42,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:55:42,459 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-21 19:55:42,460 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:55:42,460 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85162493] [2021-10-21 19:55:42,460 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:55:42,460 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203947853] [2021-10-21 19:55:42,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203947853] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:55:42,460 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:55:42,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-10-21 19:55:42,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574214963] [2021-10-21 19:55:42,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 19:55:42,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:55:42,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 19:55:42,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-21 19:55:42,461 INFO L87 Difference]: Start difference. First operand 59 states and 67 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 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 19:55:42,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:55:42,556 INFO L93 Difference]: Finished difference Result 59 states and 67 transitions. [2021-10-21 19:55:42,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 19:55:42,557 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 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 24 [2021-10-21 19:55:42,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:55:42,559 INFO L225 Difference]: With dead ends: 59 [2021-10-21 19:55:42,559 INFO L226 Difference]: Without dead ends: 57 [2021-10-21 19:55:42,559 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 62.0ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-10-21 19:55:42,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-10-21 19:55:42,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 48. [2021-10-21 19:55:42,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.127659574468085) internal successors, (53), 47 states have internal predecessors, (53), 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 19:55:42,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2021-10-21 19:55:42,571 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 24 [2021-10-21 19:55:42,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:55:42,571 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2021-10-21 19:55:42,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 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 19:55:42,572 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2021-10-21 19:55:42,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-21 19:55:42,572 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:55:42,572 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:55:42,610 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ef4f11-eeed-4a1c-b85a-462af0ffa522/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-21 19:55:42,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ef4f11-eeed-4a1c-b85a-462af0ffa522/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-10-21 19:55:42,794 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:55:42,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:55:42,794 INFO L82 PathProgramCache]: Analyzing trace with hash -1429918446, now seen corresponding path program 2 times [2021-10-21 19:55:42,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:55:42,794 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287712054] [2021-10-21 19:55:42,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:55:42,794 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:55:42,803 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:55:42,816 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [888846816] [2021-10-21 19:55:42,816 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:55:42,816 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:55:42,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ef4f11-eeed-4a1c-b85a-462af0ffa522/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:55:42,817 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ef4f11-eeed-4a1c-b85a-462af0ffa522/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:55:42,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ef4f11-eeed-4a1c-b85a-462af0ffa522/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-21 19:55:43,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:55:43,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:55:43,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-21 19:55:43,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:55:43,379 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:55:43,379 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:55:43,379 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287712054] [2021-10-21 19:55:43,380 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:55:43,380 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888846816] [2021-10-21 19:55:43,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888846816] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:55:43,380 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:55:43,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-10-21 19:55:43,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876082185] [2021-10-21 19:55:43,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-21 19:55:43,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:55:43,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-21 19:55:43,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-10-21 19:55:43,382 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:55:43,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:55:43,551 INFO L93 Difference]: Finished difference Result 63 states and 70 transitions. [2021-10-21 19:55:43,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-21 19:55:43,551 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-10-21 19:55:43,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:55:43,552 INFO L225 Difference]: With dead ends: 63 [2021-10-21 19:55:43,552 INFO L226 Difference]: Without dead ends: 59 [2021-10-21 19:55:43,552 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 52.1ms TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-10-21 19:55:43,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-10-21 19:55:43,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 53. [2021-10-21 19:55:43,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.1346153846153846) internal successors, (59), 52 states have internal predecessors, (59), 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 19:55:43,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2021-10-21 19:55:43,564 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 27 [2021-10-21 19:55:43,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:55:43,565 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2021-10-21 19:55:43,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:55:43,565 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2021-10-21 19:55:43,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-21 19:55:43,565 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:55:43,566 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:55:43,621 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ef4f11-eeed-4a1c-b85a-462af0ffa522/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-10-21 19:55:43,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ef4f11-eeed-4a1c-b85a-462af0ffa522/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-10-21 19:55:43,782 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:55:43,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:55:43,782 INFO L82 PathProgramCache]: Analyzing trace with hash -1207377834, now seen corresponding path program 3 times [2021-10-21 19:55:43,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:55:43,783 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001759333] [2021-10-21 19:55:43,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:55:43,783 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:55:43,792 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:55:43,793 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [736400227] [2021-10-21 19:55:43,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 19:55:43,793 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:55:43,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ef4f11-eeed-4a1c-b85a-462af0ffa522/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:55:43,794 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ef4f11-eeed-4a1c-b85a-462af0ffa522/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:55:43,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ef4f11-eeed-4a1c-b85a-462af0ffa522/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-10-21 19:55:44,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-21 19:55:44,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:55:44,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 34 conjunts are in the unsatisfiable core [2021-10-21 19:55:44,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:55:46,567 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-21 19:55:46,567 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:55:46,567 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001759333] [2021-10-21 19:55:46,567 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:55:46,567 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736400227] [2021-10-21 19:55:46,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736400227] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:55:46,567 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:55:46,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-10-21 19:55:46,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391487966] [2021-10-21 19:55:46,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-21 19:55:46,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:55:46,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-21 19:55:46,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-10-21 19:55:46,569 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:55:49,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:55:49,364 INFO L93 Difference]: Finished difference Result 68 states and 75 transitions. [2021-10-21 19:55:49,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-21 19:55:49,365 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-10-21 19:55:49,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:55:49,365 INFO L225 Difference]: With dead ends: 68 [2021-10-21 19:55:49,365 INFO L226 Difference]: Without dead ends: 64 [2021-10-21 19:55:49,366 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 3219.1ms TimeCoverageRelationStatistics Valid=204, Invalid=446, Unknown=0, NotChecked=0, Total=650 [2021-10-21 19:55:49,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-10-21 19:55:49,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 48. [2021-10-21 19:55:49,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.127659574468085) internal successors, (53), 47 states have internal predecessors, (53), 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 19:55:49,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2021-10-21 19:55:49,377 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 27 [2021-10-21 19:55:49,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:55:49,377 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2021-10-21 19:55:49,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:55:49,378 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2021-10-21 19:55:49,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-21 19:55:49,378 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:55:49,378 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:55:49,388 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ef4f11-eeed-4a1c-b85a-462af0ffa522/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-10-21 19:55:49,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ef4f11-eeed-4a1c-b85a-462af0ffa522/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-10-21 19:55:49,584 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:55:49,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:55:49,585 INFO L82 PathProgramCache]: Analyzing trace with hash 870904144, now seen corresponding path program 4 times [2021-10-21 19:55:49,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:55:49,585 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741976938] [2021-10-21 19:55:49,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:55:49,585 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:55:49,593 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:55:49,593 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1653579853] [2021-10-21 19:55:49,593 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-21 19:55:49,593 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:55:49,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ef4f11-eeed-4a1c-b85a-462af0ffa522/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:55:49,610 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ef4f11-eeed-4a1c-b85a-462af0ffa522/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:55:49,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ef4f11-eeed-4a1c-b85a-462af0ffa522/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-21 19:55:49,927 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-21 19:55:49,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:55:49,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-21 19:55:49,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:55:50,464 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:55:50,465 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:55:50,465 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741976938] [2021-10-21 19:55:50,465 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:55:50,465 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653579853] [2021-10-21 19:55:50,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653579853] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:55:50,466 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:55:50,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-10-21 19:55:50,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507798337] [2021-10-21 19:55:50,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-21 19:55:50,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:55:50,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-21 19:55:50,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-10-21 19:55:50,469 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:55:50,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:55:50,833 INFO L93 Difference]: Finished difference Result 61 states and 67 transitions. [2021-10-21 19:55:50,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-21 19:55:50,833 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-10-21 19:55:50,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:55:50,834 INFO L225 Difference]: With dead ends: 61 [2021-10-21 19:55:50,834 INFO L226 Difference]: Without dead ends: 57 [2021-10-21 19:55:50,835 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 263.9ms TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-10-21 19:55:50,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-10-21 19:55:50,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 48. [2021-10-21 19:55:50,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.127659574468085) internal successors, (53), 47 states have internal predecessors, (53), 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 19:55:50,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2021-10-21 19:55:50,850 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 27 [2021-10-21 19:55:50,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:55:50,850 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2021-10-21 19:55:50,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:55:50,851 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2021-10-21 19:55:50,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-21 19:55:50,852 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:55:50,852 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:55:50,889 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ef4f11-eeed-4a1c-b85a-462af0ffa522/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-10-21 19:55:51,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ef4f11-eeed-4a1c-b85a-462af0ffa522/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:55:51,074 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:55:51,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:55:51,074 INFO L82 PathProgramCache]: Analyzing trace with hash 284098130, now seen corresponding path program 3 times [2021-10-21 19:55:51,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:55:51,074 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342781334] [2021-10-21 19:55:51,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:55:51,075 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:55:51,084 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:55:51,084 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1150732236] [2021-10-21 19:55:51,084 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 19:55:51,084 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:55:51,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ef4f11-eeed-4a1c-b85a-462af0ffa522/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:55:51,111 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ef4f11-eeed-4a1c-b85a-462af0ffa522/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:55:51,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ef4f11-eeed-4a1c-b85a-462af0ffa522/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-21 19:55:51,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-21 19:55:51,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:55:51,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-21 19:55:51,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:55:52,517 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-21 19:55:52,518 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:55:52,518 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342781334] [2021-10-21 19:55:52,518 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:55:52,518 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150732236] [2021-10-21 19:55:52,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150732236] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:55:52,519 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:55:52,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-21 19:55:52,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027838388] [2021-10-21 19:55:52,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-21 19:55:52,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:55:52,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-21 19:55:52,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-10-21 19:55:52,520 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 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 19:55:52,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:55:52,987 INFO L93 Difference]: Finished difference Result 48 states and 53 transitions. [2021-10-21 19:55:52,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-21 19:55:52,987 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-10-21 19:55:52,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:55:52,988 INFO L225 Difference]: With dead ends: 48 [2021-10-21 19:55:52,988 INFO L226 Difference]: Without dead ends: 0 [2021-10-21 19:55:52,988 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 578.2ms TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-10-21 19:55:52,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-21 19:55:52,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-21 19:55:52,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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 19:55:52,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-21 19:55:52,989 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 27 [2021-10-21 19:55:52,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:55:52,989 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-21 19:55:52,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 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 19:55:52,989 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-21 19:55:52,989 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-21 19:55:52,991 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-21 19:55:52,992 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-21 19:55:53,014 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ef4f11-eeed-4a1c-b85a-462af0ffa522/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-10-21 19:55:53,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ef4f11-eeed-4a1c-b85a-462af0ffa522/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:55:53,215 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-21 19:55:53,218 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-21 19:55:53,418 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-21 19:55:53,418 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-21 19:55:53,419 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-21 19:55:58,520 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2021-10-21 19:55:58,520 INFO L860 garLoopResultBuilder]: At program point L52(lines 21 53) the Hoare annotation is: true [2021-10-21 19:55:58,520 INFO L857 garLoopResultBuilder]: For program point L15(lines 15 16) no Hoare annotation was computed. [2021-10-21 19:55:58,520 INFO L857 garLoopResultBuilder]: For program point L15-1(lines 15 16) no Hoare annotation was computed. [2021-10-21 19:55:58,520 INFO L857 garLoopResultBuilder]: For program point L11(line 11) no Hoare annotation was computed. [2021-10-21 19:55:58,520 INFO L857 garLoopResultBuilder]: For program point L11-2(line 11) no Hoare annotation was computed. [2021-10-21 19:55:58,520 INFO L857 garLoopResultBuilder]: For program point L40(lines 40 45) no Hoare annotation was computed. [2021-10-21 19:55:58,521 INFO L857 garLoopResultBuilder]: For program point L40-2(lines 40 45) no Hoare annotation was computed. [2021-10-21 19:55:58,521 INFO L857 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-10-21 19:55:58,521 INFO L853 garLoopResultBuilder]: At program point L32-2(lines 32 47) the Hoare annotation is: (let ((.cse0 (= ULTIMATE.start_assume_abort_if_not_~cond 1)) (.cse1 (* 2 ULTIMATE.start_main_~Y~0)) (.cse2 (<= 0 ULTIMATE.start_main_~Y~0)) (.cse3 (<= ULTIMATE.start_main_~Y~0 20)) (.cse4 (<= ULTIMATE.start_main_~X~0 20))) (or (and (= ULTIMATE.start_main_~y~0 0) (= ULTIMATE.start_main_~x~0 0) .cse0 (= .cse1 (+ ULTIMATE.start_main_~X~0 ULTIMATE.start_main_~v~0)) .cse2 .cse3 (<= ULTIMATE.start_main_~x~0 ULTIMATE.start_main_~X~0) .cse4) (and (<= 0 ULTIMATE.start_main_~X~0) .cse0 (= (+ (* 2 (* ULTIMATE.start_main_~x~0 ULTIMATE.start_main_~Y~0)) .cse1) (+ ULTIMATE.start_main_~X~0 ULTIMATE.start_main_~v~0 (* 2 (* ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~X~0)))) (<= 1 ULTIMATE.start___VERIFIER_assert_~cond) .cse2 .cse3 .cse4 (<= ULTIMATE.start_main_~x~0 (+ ULTIMATE.start_main_~X~0 1))))) [2021-10-21 19:55:58,521 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-21 19:55:58,521 INFO L857 garLoopResultBuilder]: For program point L32-3(lines 32 47) no Hoare annotation was computed. [2021-10-21 19:55:58,521 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-10-21 19:55:58,521 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2021-10-21 19:55:58,521 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-21 19:55:58,522 INFO L857 garLoopResultBuilder]: For program point L14(lines 14 17) no Hoare annotation was computed. [2021-10-21 19:55:58,522 INFO L853 garLoopResultBuilder]: At program point L14-2(lines 36 37) the Hoare annotation is: (and (<= 0 ULTIMATE.start_main_~X~0) (= ULTIMATE.start_assume_abort_if_not_~cond 1) (= (+ (* 2 (* ULTIMATE.start_main_~x~0 ULTIMATE.start_main_~Y~0)) (* 2 ULTIMATE.start_main_~Y~0)) (+ ULTIMATE.start_main_~X~0 ULTIMATE.start_main_~v~0 (* 2 (* ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~X~0)))) (= 1 ULTIMATE.start___VERIFIER_assert_~cond) (<= 0 ULTIMATE.start_main_~Y~0) (<= ULTIMATE.start_main_~Y~0 20) (<= ULTIMATE.start_main_~X~0 20) (<= ULTIMATE.start_main_~x~0 (+ ULTIMATE.start_main_~X~0 1))) [2021-10-21 19:55:58,522 INFO L857 garLoopResultBuilder]: For program point L14-3(lines 14 17) no Hoare annotation was computed. [2021-10-21 19:55:58,522 INFO L857 garLoopResultBuilder]: For program point L10(lines 10 12) no Hoare annotation was computed. [2021-10-21 19:55:58,522 INFO L857 garLoopResultBuilder]: For program point L10-1(lines 10 12) no Hoare annotation was computed. [2021-10-21 19:55:58,522 INFO L860 garLoopResultBuilder]: At program point L14-5(lines 13 19) the Hoare annotation is: true [2021-10-21 19:55:58,527 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-21 19:55:58,542 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.10 07:55:58 BoogieIcfgContainer [2021-10-21 19:55:58,543 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-21 19:55:58,543 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-21 19:55:58,543 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-21 19:55:58,544 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-21 19:55:58,544 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:55:16" (3/4) ... [2021-10-21 19:55:58,547 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-21 19:55:58,557 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2021-10-21 19:55:58,558 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-21 19:55:58,558 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-21 19:55:58,558 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-21 19:55:58,592 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ef4f11-eeed-4a1c-b85a-462af0ffa522/bin/uautomizer-j4sWxH34Be/witness.graphml [2021-10-21 19:55:58,592 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-21 19:55:58,594 INFO L168 Benchmark]: Toolchain (without parser) took 42928.41 ms. Allocated memory was 100.7 MB in the beginning and 180.4 MB in the end (delta: 79.7 MB). Free memory was 69.1 MB in the beginning and 100.5 MB in the end (delta: -31.4 MB). Peak memory consumption was 48.3 MB. Max. memory is 16.1 GB. [2021-10-21 19:55:58,594 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 100.7 MB. Free memory is still 53.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 19:55:58,595 INFO L168 Benchmark]: CACSL2BoogieTranslator took 302.59 ms. Allocated memory was 100.7 MB in the beginning and 123.7 MB in the end (delta: 23.1 MB). Free memory was 68.8 MB in the beginning and 98.4 MB in the end (delta: -29.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-21 19:55:58,595 INFO L168 Benchmark]: Boogie Procedure Inliner took 34.73 ms. Allocated memory is still 123.7 MB. Free memory was 98.4 MB in the beginning and 96.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-21 19:55:58,595 INFO L168 Benchmark]: Boogie Preprocessor took 23.71 ms. Allocated memory is still 123.7 MB. Free memory was 96.9 MB in the beginning and 95.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-21 19:55:58,596 INFO L168 Benchmark]: RCFGBuilder took 304.47 ms. Allocated memory is still 123.7 MB. Free memory was 95.5 MB in the beginning and 85.0 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-21 19:55:58,596 INFO L168 Benchmark]: TraceAbstraction took 42199.30 ms. Allocated memory was 123.7 MB in the beginning and 180.4 MB in the end (delta: 56.6 MB). Free memory was 85.0 MB in the beginning and 103.7 MB in the end (delta: -18.7 MB). Peak memory consumption was 93.2 MB. Max. memory is 16.1 GB. [2021-10-21 19:55:58,597 INFO L168 Benchmark]: Witness Printer took 49.02 ms. Allocated memory is still 180.4 MB. Free memory was 103.7 MB in the beginning and 100.5 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-21 19:55:58,599 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 100.7 MB. Free memory is still 53.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 302.59 ms. Allocated memory was 100.7 MB in the beginning and 123.7 MB in the end (delta: 23.1 MB). Free memory was 68.8 MB in the beginning and 98.4 MB in the end (delta: -29.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 34.73 ms. Allocated memory is still 123.7 MB. Free memory was 98.4 MB in the beginning and 96.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 23.71 ms. Allocated memory is still 123.7 MB. Free memory was 96.9 MB in the beginning and 95.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 304.47 ms. Allocated memory is still 123.7 MB. Free memory was 95.5 MB in the beginning and 85.0 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 42199.30 ms. Allocated memory was 123.7 MB in the beginning and 180.4 MB in the end (delta: 56.6 MB). Free memory was 85.0 MB in the beginning and 103.7 MB in the end (delta: -18.7 MB). Peak memory consumption was 93.2 MB. Max. memory is 16.1 GB. * Witness Printer took 49.02 ms. Allocated memory is still 180.4 MB. Free memory was 103.7 MB in the beginning and 100.5 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 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 - PositiveResult [Line: 16]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 16]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 21 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 42060.0ms, OverallIterations: 20, TraceHistogramMax: 4, EmptinessCheckTime: 42.4ms, AutomataDifference: 13336.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 5305.4ms, InitialAbstractionConstructionTime: 30.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 249 SDtfs, 313 SDslu, 835 SDs, 0 SdLazy, 2146 SolverSat, 201 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 5212.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 476 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 224 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 13684.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=59occurred in iteration=15, InterpolantAutomatonStates: 196, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 202.5ms AutomataMinimizationTime, 20 MinimizatonAttempts, 136 StatesRemovedByMinimization, 18 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 4 LocationsWithAnnotation, 4 PreInvPairs, 22 NumberOfFragments, 116 HoareAnnotationTreeSize, 4 FomulaSimplifications, 203818 FormulaSimplificationTreeSizeReduction, 256.0ms HoareSimplificationTime, 4 FomulaSimplificationsInter, 1627 FormulaSimplificationTreeSizeReductionInter, 5043.4ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 123.6ms SsaConstructionTime, 1322.2ms SatisfiabilityAnalysisTime, 14037.5ms InterpolantComputationTime, 411 NumberOfCodeBlocks, 370 NumberOfCodeBlocksAsserted, 36 NumberOfCheckSat, 391 ConstructedInterpolants, 0 QuantifiedInterpolants, 5152 SizeOfPredicates, 206 NumberOfNonLiveVariables, 1799 ConjunctsInSsa, 518 ConjunctsInUnsatCore, 20 InterpolantComputations, 4 PerfectInterpolantSequences, 99/266 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 - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold - InvariantResult [Line: 32]: Loop Invariant Derived loop invariant: (((((((y == 0 && x == 0) && cond == 1) && 2 * Y == X + v) && 0 <= Y) && Y <= 20) && x <= X) && X <= 20) || (((((((0 <= X && cond == 1) && 2 * (x * Y) + 2 * Y == X + v + 2 * (y * X)) && 1 <= cond) && 0 <= Y) && Y <= 20) && X <= 20) && x <= X + 1) - InvariantResult [Line: 13]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 21]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 36]: Loop Invariant Derived loop invariant: ((((((0 <= X && cond == 1) && 2 * (x * Y) + 2 * Y == X + v + 2 * (y * X)) && 1 == cond) && 0 <= Y) && Y <= 20) && X <= 20) && x <= X + 1 RESULT: Ultimate proved your program to be correct! [2021-10-21 19:55:58,630 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ef4f11-eeed-4a1c-b85a-462af0ffa522/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...