./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-tiling/mlceu.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-tiling/mlceu.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa --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 0d3cc2e7af8cdfad5003daafcde8bd8bcf193cd0b5d066a7a9bad715ddc9d422 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 18:27:14,229 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 18:27:14,231 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 18:27:14,260 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 18:27:14,260 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 18:27:14,261 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 18:27:14,262 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 18:27:14,264 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 18:27:14,266 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 18:27:14,266 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 18:27:14,267 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 18:27:14,268 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 18:27:14,269 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 18:27:14,270 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 18:27:14,271 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 18:27:14,272 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 18:27:14,273 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 18:27:14,273 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 18:27:14,275 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 18:27:14,277 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 18:27:14,279 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 18:27:14,280 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 18:27:14,281 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 18:27:14,282 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 18:27:14,284 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 18:27:14,285 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 18:27:14,285 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 18:27:14,286 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 18:27:14,286 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 18:27:14,287 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 18:27:14,287 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 18:27:14,288 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 18:27:14,289 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 18:27:14,289 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 18:27:14,290 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 18:27:14,290 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 18:27:14,291 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 18:27:14,291 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 18:27:14,291 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 18:27:14,291 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 18:27:14,292 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 18:27:14,293 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 18:27:14,310 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 18:27:14,310 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 18:27:14,310 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 18:27:14,311 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 18:27:14,311 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 18:27:14,311 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 18:27:14,312 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 18:27:14,312 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 18:27:14,312 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 18:27:14,312 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 18:27:14,312 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 18:27:14,312 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 18:27:14,312 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 18:27:14,312 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 18:27:14,312 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 18:27:14,313 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 18:27:14,313 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 18:27:14,313 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 18:27:14,313 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 18:27:14,313 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 18:27:14,313 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 18:27:14,313 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 18:27:14,313 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 18:27:14,314 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 18:27:14,314 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 18:27:14,314 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 18:27:14,314 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 18:27:14,314 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 18:27:14,314 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 18:27:14,314 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 18:27:14,314 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 18:27:14,314 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 18:27:14,315 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 18:27:14,315 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 18:27:14,315 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_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0d3cc2e7af8cdfad5003daafcde8bd8bcf193cd0b5d066a7a9bad715ddc9d422 [2021-12-06 18:27:14,481 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 18:27:14,497 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 18:27:14,499 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 18:27:14,499 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 18:27:14,500 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 18:27:14,501 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/array-tiling/mlceu.c [2021-12-06 18:27:14,545 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/data/c054c8706/da3136c389624da78eede72de7b6b0a6/FLAG0d6e36d7d [2021-12-06 18:27:14,909 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 18:27:14,909 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/sv-benchmarks/c/array-tiling/mlceu.c [2021-12-06 18:27:14,914 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/data/c054c8706/da3136c389624da78eede72de7b6b0a6/FLAG0d6e36d7d [2021-12-06 18:27:14,924 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/data/c054c8706/da3136c389624da78eede72de7b6b0a6 [2021-12-06 18:27:14,926 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 18:27:14,927 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 18:27:14,929 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 18:27:14,929 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 18:27:14,931 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 18:27:14,932 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 06:27:14" (1/1) ... [2021-12-06 18:27:14,933 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f12bf18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:27:14, skipping insertion in model container [2021-12-06 18:27:14,933 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 06:27:14" (1/1) ... [2021-12-06 18:27:14,938 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 18:27:14,948 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 18:27:15,065 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/sv-benchmarks/c/array-tiling/mlceu.c[396,409] [2021-12-06 18:27:15,077 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 18:27:15,083 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 18:27:15,093 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/sv-benchmarks/c/array-tiling/mlceu.c[396,409] [2021-12-06 18:27:15,097 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 18:27:15,107 INFO L208 MainTranslator]: Completed translation [2021-12-06 18:27:15,107 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:27:15 WrapperNode [2021-12-06 18:27:15,107 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 18:27:15,108 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 18:27:15,108 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 18:27:15,108 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 18:27:15,114 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:27:15" (1/1) ... [2021-12-06 18:27:15,119 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:27:15" (1/1) ... [2021-12-06 18:27:15,132 INFO L137 Inliner]: procedures = 16, calls = 13, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 54 [2021-12-06 18:27:15,132 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 18:27:15,133 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 18:27:15,133 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 18:27:15,133 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 18:27:15,139 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:27:15" (1/1) ... [2021-12-06 18:27:15,139 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:27:15" (1/1) ... [2021-12-06 18:27:15,141 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:27:15" (1/1) ... [2021-12-06 18:27:15,141 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:27:15" (1/1) ... [2021-12-06 18:27:15,144 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:27:15" (1/1) ... [2021-12-06 18:27:15,148 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:27:15" (1/1) ... [2021-12-06 18:27:15,149 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:27:15" (1/1) ... [2021-12-06 18:27:15,150 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 18:27:15,151 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 18:27:15,151 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 18:27:15,151 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 18:27:15,152 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:27:15" (1/1) ... [2021-12-06 18:27:15,160 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 18:27:15,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:27:15,182 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 18:27:15,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 18:27:15,215 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 18:27:15,216 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 18:27:15,216 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-06 18:27:15,216 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-06 18:27:15,216 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 18:27:15,216 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 18:27:15,216 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-06 18:27:15,277 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 18:27:15,279 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 18:27:15,375 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 18:27:15,380 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 18:27:15,380 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-06 18:27:15,382 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 06:27:15 BoogieIcfgContainer [2021-12-06 18:27:15,382 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 18:27:15,384 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 18:27:15,384 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 18:27:15,386 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 18:27:15,387 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 06:27:14" (1/3) ... [2021-12-06 18:27:15,387 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ed83f76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 06:27:15, skipping insertion in model container [2021-12-06 18:27:15,387 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:27:15" (2/3) ... [2021-12-06 18:27:15,388 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ed83f76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 06:27:15, skipping insertion in model container [2021-12-06 18:27:15,388 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 06:27:15" (3/3) ... [2021-12-06 18:27:15,389 INFO L111 eAbstractionObserver]: Analyzing ICFG mlceu.c [2021-12-06 18:27:15,393 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 18:27:15,394 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 18:27:15,435 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 18:27:15,442 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 [2021-12-06 18:27:15,443 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 18:27:15,456 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:27:15,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-06 18:27:15,461 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:27:15,462 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:27:15,463 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:27:15,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:27:15,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1096717866, now seen corresponding path program 1 times [2021-12-06 18:27:15,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:27:15,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599600063] [2021-12-06 18:27:15,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:27:15,477 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:27:15,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:15,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:27:15,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:27:15,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599600063] [2021-12-06 18:27:15,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599600063] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:27:15,598 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:27:15,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 18:27:15,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758922563] [2021-12-06 18:27:15,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:27:15,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-06 18:27:15,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:27:15,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-06 18:27:15,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 18:27:15,630 INFO L87 Difference]: Start difference. First operand has 19 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:27:15,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:27:15,641 INFO L93 Difference]: Finished difference Result 34 states and 46 transitions. [2021-12-06 18:27:15,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 18:27:15,643 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-06 18:27:15,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:27:15,650 INFO L225 Difference]: With dead ends: 34 [2021-12-06 18:27:15,650 INFO L226 Difference]: Without dead ends: 15 [2021-12-06 18:27:15,652 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 18:27:15,656 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:27:15,657 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:27:15,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-12-06 18:27:15,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-12-06 18:27:15,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 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) [2021-12-06 18:27:15,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2021-12-06 18:27:15,682 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 10 [2021-12-06 18:27:15,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:27:15,683 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2021-12-06 18:27:15,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:27:15,683 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2021-12-06 18:27:15,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-06 18:27:15,684 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:27:15,684 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:27:15,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 18:27:15,684 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:27:15,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:27:15,685 INFO L85 PathProgramCache]: Analyzing trace with hash 678289496, now seen corresponding path program 1 times [2021-12-06 18:27:15,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:27:15,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207114567] [2021-12-06 18:27:15,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:27:15,686 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:27:15,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:15,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:27:15,745 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:27:15,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207114567] [2021-12-06 18:27:15,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207114567] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:27:15,746 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:27:15,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 18:27:15,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965785806] [2021-12-06 18:27:15,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:27:15,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 18:27:15,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:27:15,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 18:27:15,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 18:27:15,749 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:27:15,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:27:15,788 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2021-12-06 18:27:15,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 18:27:15,789 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-06 18:27:15,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:27:15,790 INFO L225 Difference]: With dead ends: 34 [2021-12-06 18:27:15,790 INFO L226 Difference]: Without dead ends: 24 [2021-12-06 18:27:15,790 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 18:27:15,792 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 27 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:27:15,793 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 15 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:27:15,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-12-06 18:27:15,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 17. [2021-12-06 18:27:15,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 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) [2021-12-06 18:27:15,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-12-06 18:27:15,797 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 10 [2021-12-06 18:27:15,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:27:15,797 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-12-06 18:27:15,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:27:15,798 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-12-06 18:27:15,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-06 18:27:15,798 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:27:15,798 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:27:15,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 18:27:15,799 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:27:15,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:27:15,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1190752748, now seen corresponding path program 1 times [2021-12-06 18:27:15,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:27:15,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675172610] [2021-12-06 18:27:15,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:27:15,800 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:27:15,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:15,927 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:27:15,927 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:27:15,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675172610] [2021-12-06 18:27:15,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675172610] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:27:15,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241332273] [2021-12-06 18:27:15,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:27:15,928 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:27:15,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:27:15,929 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:27:15,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 18:27:15,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:15,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-06 18:27:15,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:27:16,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-12-06 18:27:16,117 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:27:16,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:27:16,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2021-12-06 18:27:16,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2021-12-06 18:27:16,182 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:27:16,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241332273] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:27:16,183 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:27:16,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2021-12-06 18:27:16,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326462602] [2021-12-06 18:27:16,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:27:16,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 18:27:16,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:27:16,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 18:27:16,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-12-06 18:27:16,185 INFO L87 Difference]: Start difference. First operand 17 states and 19 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) [2021-12-06 18:27:16,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:27:16,262 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2021-12-06 18:27:16,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 18:27:16,263 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 13 [2021-12-06 18:27:16,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:27:16,263 INFO L225 Difference]: With dead ends: 26 [2021-12-06 18:27:16,264 INFO L226 Difference]: Without dead ends: 24 [2021-12-06 18:27:16,264 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-12-06 18:27:16,266 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 32 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:27:16,266 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 46 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:27:16,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-12-06 18:27:16,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 19. [2021-12-06 18:27:16,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 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) [2021-12-06 18:27:16,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-12-06 18:27:16,272 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 13 [2021-12-06 18:27:16,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:27:16,272 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-12-06 18:27:16,272 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) [2021-12-06 18:27:16,272 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-12-06 18:27:16,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-06 18:27:16,273 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:27:16,273 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:27:16,294 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 18:27:16,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:27:16,475 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:27:16,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:27:16,478 INFO L85 PathProgramCache]: Analyzing trace with hash 1891500962, now seen corresponding path program 1 times [2021-12-06 18:27:16,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:27:16,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224692083] [2021-12-06 18:27:16,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:27:16,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:27:16,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:16,642 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:27:16,642 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:27:16,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224692083] [2021-12-06 18:27:16,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224692083] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:27:16,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503238672] [2021-12-06 18:27:16,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:27:16,643 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:27:16,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:27:16,644 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:27:16,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 18:27:16,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:16,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 18:27:16,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:27:16,738 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:27:16,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:27:16,771 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:27:16,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503238672] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:27:16,771 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:27:16,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2021-12-06 18:27:16,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873236827] [2021-12-06 18:27:16,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:27:16,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-06 18:27:16,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:27:16,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-06 18:27:16,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-12-06 18:27:16,774 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:27:16,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:27:16,830 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2021-12-06 18:27:16,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 18:27:16,830 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 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 [2021-12-06 18:27:16,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:27:16,831 INFO L225 Difference]: With dead ends: 49 [2021-12-06 18:27:16,831 INFO L226 Difference]: Without dead ends: 31 [2021-12-06 18:27:16,831 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-12-06 18:27:16,833 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 20 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:27:16,833 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 45 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:27:16,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-12-06 18:27:16,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 22. [2021-12-06 18:27:16,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 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) [2021-12-06 18:27:16,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2021-12-06 18:27:16,838 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 17 [2021-12-06 18:27:16,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:27:16,838 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2021-12-06 18:27:16,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:27:16,839 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2021-12-06 18:27:16,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-06 18:27:16,839 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:27:16,839 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:27:16,859 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 18:27:17,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:27:17,041 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:27:17,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:27:17,043 INFO L85 PathProgramCache]: Analyzing trace with hash -2006236274, now seen corresponding path program 2 times [2021-12-06 18:27:17,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:27:17,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645566862] [2021-12-06 18:27:17,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:27:17,046 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:27:17,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:17,158 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:27:17,159 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:27:17,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645566862] [2021-12-06 18:27:17,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645566862] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:27:17,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391703467] [2021-12-06 18:27:17,159 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:27:17,159 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:27:17,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:27:17,160 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:27:17,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 18:27:17,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 18:27:17,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:27:17,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-06 18:27:17,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:27:17,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 18:27:17,280 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:27:17,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:27:17,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-12-06 18:27:17,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-12-06 18:27:17,331 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:27:17,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391703467] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:27:17,331 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:27:17,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 11 [2021-12-06 18:27:17,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584353479] [2021-12-06 18:27:17,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:27:17,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-06 18:27:17,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:27:17,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-06 18:27:17,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-12-06 18:27:17,333 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:27:17,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:27:17,416 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2021-12-06 18:27:17,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 18:27:17,416 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-12-06 18:27:17,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:27:17,417 INFO L225 Difference]: With dead ends: 33 [2021-12-06 18:27:17,417 INFO L226 Difference]: Without dead ends: 31 [2021-12-06 18:27:17,418 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 6 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-12-06 18:27:17,419 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 29 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:27:17,419 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 54 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:27:17,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-12-06 18:27:17,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2021-12-06 18:27:17,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.12) internal successors, (28), 25 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) [2021-12-06 18:27:17,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2021-12-06 18:27:17,425 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 20 [2021-12-06 18:27:17,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:27:17,425 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2021-12-06 18:27:17,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:27:17,425 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2021-12-06 18:27:17,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-06 18:27:17,426 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:27:17,426 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:27:17,446 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 18:27:17,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:27:17,628 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:27:17,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:27:17,629 INFO L85 PathProgramCache]: Analyzing trace with hash 466236484, now seen corresponding path program 3 times [2021-12-06 18:27:17,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:27:17,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705954217] [2021-12-06 18:27:17,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:27:17,631 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:27:17,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:17,745 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:27:17,746 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:27:17,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705954217] [2021-12-06 18:27:17,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705954217] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:27:17,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732223418] [2021-12-06 18:27:17,746 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 18:27:17,746 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:27:17,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:27:17,747 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:27:17,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 18:27:17,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-06 18:27:17,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:27:17,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-06 18:27:17,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:27:17,844 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:27:17,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:27:17,875 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:27:17,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732223418] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:27:17,876 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:27:17,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2021-12-06 18:27:17,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567804508] [2021-12-06 18:27:17,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:27:17,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-06 18:27:17,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:27:17,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-06 18:27:17,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-12-06 18:27:17,877 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:27:17,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:27:17,928 INFO L93 Difference]: Finished difference Result 64 states and 70 transitions. [2021-12-06 18:27:17,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 18:27:17,928 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-12-06 18:27:17,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:27:17,929 INFO L225 Difference]: With dead ends: 64 [2021-12-06 18:27:17,929 INFO L226 Difference]: Without dead ends: 38 [2021-12-06 18:27:17,930 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-12-06 18:27:17,930 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 43 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:27:17,930 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 57 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:27:17,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-12-06 18:27:17,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 29. [2021-12-06 18:27:17,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:27:17,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2021-12-06 18:27:17,934 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 24 [2021-12-06 18:27:17,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:27:17,934 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2021-12-06 18:27:17,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:27:17,935 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2021-12-06 18:27:17,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-06 18:27:17,935 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:27:17,935 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:27:17,967 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 18:27:18,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:27:18,137 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:27:18,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:27:18,139 INFO L85 PathProgramCache]: Analyzing trace with hash -1524796712, now seen corresponding path program 4 times [2021-12-06 18:27:18,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:27:18,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277400464] [2021-12-06 18:27:18,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:27:18,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:27:18,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:18,352 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:27:18,352 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:27:18,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277400464] [2021-12-06 18:27:18,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277400464] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:27:18,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711637375] [2021-12-06 18:27:18,353 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 18:27:18,353 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:27:18,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:27:18,354 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:27:18,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 18:27:18,390 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 18:27:18,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:27:18,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-06 18:27:18,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:27:18,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 18:27:18,517 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:27:18,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:27:18,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-12-06 18:27:18,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-12-06 18:27:18,608 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:27:18,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711637375] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:27:18,608 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:27:18,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2021-12-06 18:27:18,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690115440] [2021-12-06 18:27:18,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:27:18,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-06 18:27:18,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:27:18,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-06 18:27:18,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-12-06 18:27:18,610 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 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) [2021-12-06 18:27:18,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:27:18,791 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2021-12-06 18:27:18,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-06 18:27:18,792 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 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) Word has length 27 [2021-12-06 18:27:18,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:27:18,792 INFO L225 Difference]: With dead ends: 40 [2021-12-06 18:27:18,793 INFO L226 Difference]: Without dead ends: 38 [2021-12-06 18:27:18,793 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=148, Invalid=722, Unknown=0, NotChecked=0, Total=870 [2021-12-06 18:27:18,794 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 40 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:27:18,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 101 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 18:27:18,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-12-06 18:27:18,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 33. [2021-12-06 18:27:18,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.09375) internal successors, (35), 32 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:27:18,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2021-12-06 18:27:18,800 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 27 [2021-12-06 18:27:18,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:27:18,801 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2021-12-06 18:27:18,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 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) [2021-12-06 18:27:18,801 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2021-12-06 18:27:18,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-06 18:27:18,802 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:27:18,802 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:27:18,825 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 18:27:19,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:27:19,003 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:27:19,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:27:19,005 INFO L85 PathProgramCache]: Analyzing trace with hash 702525070, now seen corresponding path program 5 times [2021-12-06 18:27:19,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:27:19,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764155253] [2021-12-06 18:27:19,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:27:19,006 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:27:19,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:19,179 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:27:19,180 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:27:19,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764155253] [2021-12-06 18:27:19,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764155253] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:27:19,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826796766] [2021-12-06 18:27:19,180 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 18:27:19,180 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:27:19,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:27:19,181 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:27:19,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 18:27:19,228 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-12-06 18:27:19,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:27:19,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-06 18:27:19,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:27:19,327 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:27:19,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:27:19,378 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:27:19,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826796766] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:27:19,379 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:27:19,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2021-12-06 18:27:19,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065781909] [2021-12-06 18:27:19,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:27:19,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-06 18:27:19,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:27:19,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-06 18:27:19,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-12-06 18:27:19,380 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:27:19,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:27:19,464 INFO L93 Difference]: Finished difference Result 79 states and 85 transitions. [2021-12-06 18:27:19,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-06 18:27:19,465 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 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 31 [2021-12-06 18:27:19,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:27:19,465 INFO L225 Difference]: With dead ends: 79 [2021-12-06 18:27:19,465 INFO L226 Difference]: Without dead ends: 45 [2021-12-06 18:27:19,466 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2021-12-06 18:27:19,467 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 54 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:27:19,467 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 63 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:27:19,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-12-06 18:27:19,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 36. [2021-12-06 18:27:19,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 35 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) [2021-12-06 18:27:19,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2021-12-06 18:27:19,473 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 31 [2021-12-06 18:27:19,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:27:19,473 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2021-12-06 18:27:19,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:27:19,474 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2021-12-06 18:27:19,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-06 18:27:19,475 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:27:19,475 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:27:19,498 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-06 18:27:19,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-12-06 18:27:19,678 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:27:19,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:27:19,678 INFO L85 PathProgramCache]: Analyzing trace with hash -1539792518, now seen corresponding path program 6 times [2021-12-06 18:27:19,679 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:27:19,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125935907] [2021-12-06 18:27:19,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:27:19,679 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:27:19,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:19,953 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:27:19,953 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:27:19,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125935907] [2021-12-06 18:27:19,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125935907] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:27:19,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590594573] [2021-12-06 18:27:19,954 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 18:27:19,954 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:27:19,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:27:19,955 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:27:19,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 18:27:20,000 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-12-06 18:27:20,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:27:20,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-06 18:27:20,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:27:20,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 18:27:20,311 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-12-06 18:27:20,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 23 [2021-12-06 18:27:20,325 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 15 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:27:20,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:27:20,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-12-06 18:27:20,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2021-12-06 18:27:20,643 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 12 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:27:20,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590594573] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:27:20,644 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:27:20,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 14] total 31 [2021-12-06 18:27:20,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235514506] [2021-12-06 18:27:20,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:27:20,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-06 18:27:20,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:27:20,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-06 18:27:20,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=773, Unknown=0, NotChecked=0, Total=930 [2021-12-06 18:27:20,646 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand has 31 states, 31 states have (on average 2.5806451612903225) internal successors, (80), 31 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:27:20,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:27:20,948 INFO L93 Difference]: Finished difference Result 59 states and 62 transitions. [2021-12-06 18:27:20,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-06 18:27:20,948 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.5806451612903225) internal successors, (80), 31 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-12-06 18:27:20,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:27:20,949 INFO L225 Difference]: With dead ends: 59 [2021-12-06 18:27:20,949 INFO L226 Difference]: Without dead ends: 39 [2021-12-06 18:27:20,951 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 523 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=401, Invalid=1855, Unknown=0, NotChecked=0, Total=2256 [2021-12-06 18:27:20,951 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 55 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:27:20,952 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 102 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 58 Invalid, 0 Unknown, 71 Unchecked, 0.0s Time] [2021-12-06 18:27:20,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-12-06 18:27:20,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2021-12-06 18:27:20,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 37 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:27:20,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2021-12-06 18:27:20,957 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 34 [2021-12-06 18:27:20,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:27:20,957 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2021-12-06 18:27:20,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.5806451612903225) internal successors, (80), 31 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:27:20,958 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2021-12-06 18:27:20,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-06 18:27:20,959 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:27:20,959 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:27:20,979 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-06 18:27:21,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:27:21,160 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:27:21,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:27:21,162 INFO L85 PathProgramCache]: Analyzing trace with hash -1107758196, now seen corresponding path program 1 times [2021-12-06 18:27:21,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:27:21,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878954697] [2021-12-06 18:27:21,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:27:21,163 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:27:21,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:21,281 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-06 18:27:21,282 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:27:21,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878954697] [2021-12-06 18:27:21,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878954697] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:27:21,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327306174] [2021-12-06 18:27:21,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:27:21,283 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:27:21,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:27:21,284 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:27:21,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-06 18:27:21,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:21,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 18:27:21,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:27:21,397 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-06 18:27:21,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:27:21,486 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-06 18:27:21,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327306174] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:27:21,486 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:27:21,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2021-12-06 18:27:21,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914285152] [2021-12-06 18:27:21,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:27:21,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-06 18:27:21,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:27:21,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-06 18:27:21,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-12-06 18:27:21,488 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 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) [2021-12-06 18:27:21,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:27:21,567 INFO L93 Difference]: Finished difference Result 124 states and 139 transitions. [2021-12-06 18:27:21,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-06 18:27:21,567 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 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) Word has length 37 [2021-12-06 18:27:21,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:27:21,569 INFO L225 Difference]: With dead ends: 124 [2021-12-06 18:27:21,569 INFO L226 Difference]: Without dead ends: 104 [2021-12-06 18:27:21,570 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-12-06 18:27:21,571 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 133 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:27:21,571 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 57 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 18:27:21,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-12-06 18:27:21,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 54. [2021-12-06 18:27:21,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.150943396226415) 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) [2021-12-06 18:27:21,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2021-12-06 18:27:21,580 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 37 [2021-12-06 18:27:21,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:27:21,580 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2021-12-06 18:27:21,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 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) [2021-12-06 18:27:21,580 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2021-12-06 18:27:21,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-06 18:27:21,581 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:27:21,582 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:27:21,615 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-06 18:27:21,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-06 18:27:21,782 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:27:21,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:27:21,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1498265358, now seen corresponding path program 7 times [2021-12-06 18:27:21,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:27:21,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195227882] [2021-12-06 18:27:21,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:27:21,783 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:27:21,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:21,990 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:27:21,990 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:27:21,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195227882] [2021-12-06 18:27:21,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195227882] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:27:21,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463869898] [2021-12-06 18:27:21,990 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 18:27:21,990 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:27:21,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:27:21,991 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:27:21,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-06 18:27:22,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:22,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-06 18:27:22,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:27:22,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 18:27:22,108 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 18:27:22,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-06 18:27:22,209 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:27:22,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:27:24,330 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_108| Int)) (or (forall ((v_ArrVal_155 Int)) (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_108| 4)) v_ArrVal_155) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 12)) 0)) (< |v_ULTIMATE.start_main_~i~0#1_108| (+ |c_ULTIMATE.start_main_~i~0#1| 1)))) is different from false [2021-12-06 18:27:24,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2021-12-06 18:27:24,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 178 treesize of output 170 [2021-12-06 18:27:24,399 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2021-12-06 18:27:24,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463869898] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:27:24,399 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:27:24,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 14] total 31 [2021-12-06 18:27:24,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800476089] [2021-12-06 18:27:24,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:27:24,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-06 18:27:24,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:27:24,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-06 18:27:24,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=755, Unknown=1, NotChecked=56, Total=930 [2021-12-06 18:27:24,401 INFO L87 Difference]: Start difference. First operand 54 states and 61 transitions. Second operand has 31 states, 31 states have (on average 2.806451612903226) internal successors, (87), 31 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:27:26,484 WARN L838 $PredicateComparison]: unable to prove that (and (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (<= |c_ULTIMATE.start_main_~i~0#1| 3) (forall ((|v_ULTIMATE.start_main_~i~0#1_108| Int)) (or (forall ((v_ArrVal_155 Int)) (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_108| 4)) v_ArrVal_155) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 12)) 0)) (< |v_ULTIMATE.start_main_~i~0#1_108| (+ |c_ULTIMATE.start_main_~i~0#1| 1)))) (<= 3 |c_ULTIMATE.start_main_~i~0#1|) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4))) 0)) is different from false [2021-12-06 18:27:26,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:27:26,662 INFO L93 Difference]: Finished difference Result 64 states and 71 transitions. [2021-12-06 18:27:26,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-06 18:27:26,662 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.806451612903226) internal successors, (87), 31 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-12-06 18:27:26,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:27:26,663 INFO L225 Difference]: With dead ends: 64 [2021-12-06 18:27:26,663 INFO L226 Difference]: Without dead ends: 62 [2021-12-06 18:27:26,663 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=235, Invalid=1493, Unknown=2, NotChecked=162, Total=1892 [2021-12-06 18:27:26,664 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 79 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:27:26,664 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 171 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 384 Invalid, 0 Unknown, 52 Unchecked, 0.1s Time] [2021-12-06 18:27:26,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-12-06 18:27:26,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 58. [2021-12-06 18:27:26,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.1403508771929824) 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) [2021-12-06 18:27:26,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 65 transitions. [2021-12-06 18:27:26,669 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 65 transitions. Word has length 37 [2021-12-06 18:27:26,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:27:26,669 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 65 transitions. [2021-12-06 18:27:26,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.806451612903226) internal successors, (87), 31 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:27:26,669 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 65 transitions. [2021-12-06 18:27:26,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-06 18:27:26,670 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:27:26,670 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:27:26,691 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-06 18:27:26,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-06 18:27:26,871 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:27:26,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:27:26,872 INFO L85 PathProgramCache]: Analyzing trace with hash 122087364, now seen corresponding path program 8 times [2021-12-06 18:27:26,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:27:26,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880724910] [2021-12-06 18:27:26,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:27:26,874 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:27:26,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:27,006 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:27:27,006 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:27:27,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880724910] [2021-12-06 18:27:27,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880724910] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:27:27,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345511065] [2021-12-06 18:27:27,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:27:27,007 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:27:27,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:27:27,007 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:27:27,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-06 18:27:27,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 18:27:27,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:27:27,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-06 18:27:27,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:27:27,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 18:27:27,201 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:27:27,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:27:27,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-12-06 18:27:27,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-12-06 18:27:27,309 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:27:27,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345511065] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:27:27,310 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:27:27,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 20 [2021-12-06 18:27:27,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281506816] [2021-12-06 18:27:27,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:27:27,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-06 18:27:27,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:27:27,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-06 18:27:27,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-12-06 18:27:27,312 INFO L87 Difference]: Start difference. First operand 58 states and 65 transitions. Second operand has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:27:27,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:27:27,539 INFO L93 Difference]: Finished difference Result 68 states and 75 transitions. [2021-12-06 18:27:27,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-06 18:27:27,539 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-12-06 18:27:27,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:27:27,540 INFO L225 Difference]: With dead ends: 68 [2021-12-06 18:27:27,540 INFO L226 Difference]: Without dead ends: 66 [2021-12-06 18:27:27,541 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 71 SyntacticMatches, 6 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=137, Invalid=919, Unknown=0, NotChecked=0, Total=1056 [2021-12-06 18:27:27,541 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 42 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:27:27,541 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 169 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 18:27:27,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-12-06 18:27:27,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 62. [2021-12-06 18:27:27,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.1311475409836065) internal successors, (69), 61 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:27:27,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 69 transitions. [2021-12-06 18:27:27,548 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 69 transitions. Word has length 41 [2021-12-06 18:27:27,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:27:27,549 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 69 transitions. [2021-12-06 18:27:27,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:27:27,549 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 69 transitions. [2021-12-06 18:27:27,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-06 18:27:27,550 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:27:27,550 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:27:27,582 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-06 18:27:27,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:27:27,752 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:27:27,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:27:27,753 INFO L85 PathProgramCache]: Analyzing trace with hash -1087582854, now seen corresponding path program 9 times [2021-12-06 18:27:27,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:27:27,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957611349] [2021-12-06 18:27:27,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:27:27,754 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:27:27,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:27,875 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 33 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:27:27,875 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:27:27,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957611349] [2021-12-06 18:27:27,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957611349] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:27:27,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840640889] [2021-12-06 18:27:27,875 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 18:27:27,876 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:27:27,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:27:27,876 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:27:27,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-06 18:27:27,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-12-06 18:27:27,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:27:27,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-06 18:27:27,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:27:28,059 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 50 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:27:28,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:27:28,113 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 50 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:27:28,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840640889] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:27:28,113 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:27:28,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2021-12-06 18:27:28,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539347615] [2021-12-06 18:27:28,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:27:28,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-06 18:27:28,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:27:28,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-06 18:27:28,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2021-12-06 18:27:28,114 INFO L87 Difference]: Start difference. First operand 62 states and 69 transitions. Second operand has 23 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 23 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:27:28,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:27:28,199 INFO L93 Difference]: Finished difference Result 98 states and 105 transitions. [2021-12-06 18:27:28,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-06 18:27:28,200 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 23 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-12-06 18:27:28,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:27:28,200 INFO L225 Difference]: With dead ends: 98 [2021-12-06 18:27:28,200 INFO L226 Difference]: Without dead ends: 70 [2021-12-06 18:27:28,201 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=212, Invalid=600, Unknown=0, NotChecked=0, Total=812 [2021-12-06 18:27:28,201 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 82 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:27:28,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 106 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:27:28,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-12-06 18:27:28,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 62. [2021-12-06 18:27:28,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.1147540983606556) internal successors, (68), 61 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:27:28,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 68 transitions. [2021-12-06 18:27:28,213 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 68 transitions. Word has length 45 [2021-12-06 18:27:28,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:27:28,214 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 68 transitions. [2021-12-06 18:27:28,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 23 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:27:28,214 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 68 transitions. [2021-12-06 18:27:28,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-06 18:27:28,215 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:27:28,215 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:27:28,234 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-06 18:27:28,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-06 18:27:28,416 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:27:28,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:27:28,417 INFO L85 PathProgramCache]: Analyzing trace with hash -2143538330, now seen corresponding path program 10 times [2021-12-06 18:27:28,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:27:28,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682481050] [2021-12-06 18:27:28,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:27:28,418 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:27:28,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:28,599 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:27:28,599 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:27:28,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682481050] [2021-12-06 18:27:28,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682481050] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:27:28,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983974607] [2021-12-06 18:27:28,599 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 18:27:28,600 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:27:28,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:27:28,600 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:27:28,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-06 18:27:28,641 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 18:27:28,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:27:28,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-06 18:27:28,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:27:28,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 18:27:28,817 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:27:28,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:27:28,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-12-06 18:27:28,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-12-06 18:27:28,909 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:27:28,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983974607] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:27:28,910 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:27:28,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 23 [2021-12-06 18:27:28,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343997744] [2021-12-06 18:27:28,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:27:28,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-06 18:27:28,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:27:28,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-06 18:27:28,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-12-06 18:27:28,911 INFO L87 Difference]: Start difference. First operand 62 states and 68 transitions. Second operand has 23 states, 23 states have (on average 3.260869565217391) internal successors, (75), 23 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:27:29,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:27:29,185 INFO L93 Difference]: Finished difference Result 72 states and 78 transitions. [2021-12-06 18:27:29,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-06 18:27:29,186 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.260869565217391) internal successors, (75), 23 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-12-06 18:27:29,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:27:29,186 INFO L225 Difference]: With dead ends: 72 [2021-12-06 18:27:29,186 INFO L226 Difference]: Without dead ends: 70 [2021-12-06 18:27:29,187 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 84 SyntacticMatches, 6 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=158, Invalid=1248, Unknown=0, NotChecked=0, Total=1406 [2021-12-06 18:27:29,187 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 45 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 591 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 18:27:29,187 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 227 Invalid, 637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 591 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 18:27:29,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-12-06 18:27:29,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 66. [2021-12-06 18:27:29,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.1076923076923078) internal successors, (72), 65 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:27:29,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 72 transitions. [2021-12-06 18:27:29,192 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 72 transitions. Word has length 48 [2021-12-06 18:27:29,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:27:29,192 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 72 transitions. [2021-12-06 18:27:29,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.260869565217391) internal successors, (75), 23 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:27:29,193 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 72 transitions. [2021-12-06 18:27:29,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-06 18:27:29,193 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:27:29,193 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:27:29,213 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-06 18:27:29,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:27:29,394 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:27:29,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:27:29,395 INFO L85 PathProgramCache]: Analyzing trace with hash -546342884, now seen corresponding path program 11 times [2021-12-06 18:27:29,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:27:29,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708585848] [2021-12-06 18:27:29,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:27:29,397 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:27:29,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:29,514 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 51 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:27:29,514 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:27:29,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708585848] [2021-12-06 18:27:29,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708585848] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:27:29,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295232733] [2021-12-06 18:27:29,515 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 18:27:29,515 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:27:29,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:27:29,515 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:27:29,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-06 18:27:29,570 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-12-06 18:27:29,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:27:29,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-06 18:27:29,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:27:29,703 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 72 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:27:29,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:27:29,764 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 72 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:27:29,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295232733] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:27:29,764 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:27:29,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2021-12-06 18:27:29,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229358244] [2021-12-06 18:27:29,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:27:29,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-06 18:27:29,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:27:29,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-06 18:27:29,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2021-12-06 18:27:29,766 INFO L87 Difference]: Start difference. First operand 66 states and 72 transitions. Second operand has 26 states, 26 states have (on average 3.3461538461538463) internal successors, (87), 26 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:27:29,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:27:29,878 INFO L93 Difference]: Finished difference Result 106 states and 112 transitions. [2021-12-06 18:27:29,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-06 18:27:29,878 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.3461538461538463) internal successors, (87), 26 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-12-06 18:27:29,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:27:29,879 INFO L225 Difference]: With dead ends: 106 [2021-12-06 18:27:29,879 INFO L226 Difference]: Without dead ends: 74 [2021-12-06 18:27:29,879 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=270, Invalid=786, Unknown=0, NotChecked=0, Total=1056 [2021-12-06 18:27:29,880 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 147 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:27:29,880 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 115 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 18:27:29,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-12-06 18:27:29,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 66. [2021-12-06 18:27:29,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.0923076923076922) internal successors, (71), 65 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:27:29,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 71 transitions. [2021-12-06 18:27:29,884 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 71 transitions. Word has length 52 [2021-12-06 18:27:29,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:27:29,884 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 71 transitions. [2021-12-06 18:27:29,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.3461538461538463) internal successors, (87), 26 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:27:29,885 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 71 transitions. [2021-12-06 18:27:29,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-06 18:27:29,885 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:27:29,885 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:27:29,908 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-12-06 18:27:30,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-06 18:27:30,086 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:27:30,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:27:30,086 INFO L85 PathProgramCache]: Analyzing trace with hash 969527472, now seen corresponding path program 12 times [2021-12-06 18:27:30,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:27:30,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187511869] [2021-12-06 18:27:30,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:27:30,087 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:27:30,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:30,237 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:27:30,237 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:27:30,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187511869] [2021-12-06 18:27:30,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187511869] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:27:30,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828277505] [2021-12-06 18:27:30,237 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 18:27:30,237 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:27:30,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:27:30,238 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:27:30,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-06 18:27:30,459 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-12-06 18:27:30,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:27:30,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-06 18:27:30,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:27:30,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 18:27:30,940 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-12-06 18:27:30,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 23 [2021-12-06 18:27:30,955 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 66 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:27:30,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:27:31,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-12-06 18:27:31,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2021-12-06 18:27:31,468 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 60 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:27:31,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828277505] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:27:31,469 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:27:31,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20, 20] total 47 [2021-12-06 18:27:31,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458353631] [2021-12-06 18:27:31,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:27:31,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-12-06 18:27:31,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:27:31,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-12-06 18:27:31,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=1886, Unknown=0, NotChecked=0, Total=2162 [2021-12-06 18:27:31,471 INFO L87 Difference]: Start difference. First operand 66 states and 71 transitions. Second operand has 47 states, 47 states have (on average 2.851063829787234) internal successors, (134), 47 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:27:31,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:27:31,940 INFO L93 Difference]: Finished difference Result 98 states and 103 transitions. [2021-12-06 18:27:31,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-06 18:27:31,941 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.851063829787234) internal successors, (134), 47 states have internal predecessors, (134), 0 states have call successors, (0), 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 55 [2021-12-06 18:27:31,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:27:31,941 INFO L225 Difference]: With dead ends: 98 [2021-12-06 18:27:31,941 INFO L226 Difference]: Without dead ends: 66 [2021-12-06 18:27:31,943 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 912 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=554, Invalid=4138, Unknown=0, NotChecked=0, Total=4692 [2021-12-06 18:27:31,944 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 35 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:27:31,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 272 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 239 Invalid, 0 Unknown, 86 Unchecked, 0.1s Time] [2021-12-06 18:27:31,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-12-06 18:27:31,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2021-12-06 18:27:31,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.0769230769230769) internal successors, (70), 65 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:27:31,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2021-12-06 18:27:31,950 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 55 [2021-12-06 18:27:31,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:27:31,950 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2021-12-06 18:27:31,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.851063829787234) internal successors, (134), 47 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:27:31,951 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2021-12-06 18:27:31,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-06 18:27:31,951 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:27:31,952 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:27:31,973 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-12-06 18:27:32,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-06 18:27:32,153 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:27:32,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:27:32,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1317814372, now seen corresponding path program 13 times [2021-12-06 18:27:32,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:27:32,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760389400] [2021-12-06 18:27:32,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:27:32,156 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:27:32,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:32,372 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:27:32,372 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:27:32,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760389400] [2021-12-06 18:27:32,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760389400] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:27:32,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139841408] [2021-12-06 18:27:32,373 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 18:27:32,373 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:27:32,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:27:32,374 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:27:32,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-06 18:27:32,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:32,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-06 18:27:32,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:27:32,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 18:27:32,504 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-06 18:27:32,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2021-12-06 18:27:32,653 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:27:32,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:27:32,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-12-06 18:27:32,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-12-06 18:27:32,786 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:27:32,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139841408] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:27:32,786 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:27:32,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 20] total 29 [2021-12-06 18:27:32,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932945770] [2021-12-06 18:27:32,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:27:32,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-06 18:27:32,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:27:32,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-06 18:27:32,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=723, Unknown=0, NotChecked=0, Total=812 [2021-12-06 18:27:32,788 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand has 29 states, 29 states have (on average 3.1724137931034484) internal successors, (92), 29 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:27:33,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:27:33,197 INFO L93 Difference]: Finished difference Result 118 states and 122 transitions. [2021-12-06 18:27:33,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-12-06 18:27:33,198 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.1724137931034484) internal successors, (92), 29 states have internal predecessors, (92), 0 states have call successors, (0), 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 58 [2021-12-06 18:27:33,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:27:33,198 INFO L225 Difference]: With dead ends: 118 [2021-12-06 18:27:33,198 INFO L226 Difference]: Without dead ends: 116 [2021-12-06 18:27:33,199 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 100 SyntacticMatches, 7 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 619 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=247, Invalid=2509, Unknown=0, NotChecked=0, Total=2756 [2021-12-06 18:27:33,200 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 81 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 757 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 18:27:33,200 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 386 Invalid, 859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 757 Invalid, 0 Unknown, 16 Unchecked, 0.2s Time] [2021-12-06 18:27:33,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-12-06 18:27:33,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 71. [2021-12-06 18:27:33,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.0714285714285714) internal successors, (75), 70 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:27:33,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2021-12-06 18:27:33,205 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 58 [2021-12-06 18:27:33,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:27:33,205 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2021-12-06 18:27:33,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.1724137931034484) internal successors, (92), 29 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:27:33,205 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2021-12-06 18:27:33,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-06 18:27:33,205 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:27:33,206 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:27:33,225 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-12-06 18:27:33,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-06 18:27:33,407 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:27:33,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:27:33,408 INFO L85 PathProgramCache]: Analyzing trace with hash 432429360, now seen corresponding path program 14 times [2021-12-06 18:27:33,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:27:33,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304159974] [2021-12-06 18:27:33,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:27:33,409 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:27:33,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:33,623 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:27:33,624 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:27:33,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304159974] [2021-12-06 18:27:33,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304159974] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:27:33,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370532683] [2021-12-06 18:27:33,624 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:27:33,624 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:27:33,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:27:33,625 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:27:33,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-06 18:27:33,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 18:27:33,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:27:33,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 43 conjunts are in the unsatisfiable core [2021-12-06 18:27:33,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:27:33,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 18:27:33,769 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 18:27:33,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-06 18:27:33,801 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 18:27:33,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-06 18:27:33,939 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 2 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:27:33,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:27:34,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-12-06 18:27:34,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-12-06 18:27:34,121 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 188 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:27:34,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370532683] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:27:34,121 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:27:34,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 21] total 30 [2021-12-06 18:27:34,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887060837] [2021-12-06 18:27:34,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:27:34,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-06 18:27:34,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:27:34,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-06 18:27:34,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2021-12-06 18:27:34,123 INFO L87 Difference]: Start difference. First operand 71 states and 75 transitions. Second operand has 30 states, 30 states have (on average 3.2333333333333334) internal successors, (97), 30 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:27:34,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:27:34,527 INFO L93 Difference]: Finished difference Result 108 states and 112 transitions. [2021-12-06 18:27:34,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-06 18:27:34,527 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.2333333333333334) internal successors, (97), 30 states have internal predecessors, (97), 0 states have call successors, (0), 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 61 [2021-12-06 18:27:34,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:27:34,528 INFO L225 Difference]: With dead ends: 108 [2021-12-06 18:27:34,528 INFO L226 Difference]: Without dead ends: 106 [2021-12-06 18:27:34,529 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 105 SyntacticMatches, 9 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=226, Invalid=2126, Unknown=0, NotChecked=0, Total=2352 [2021-12-06 18:27:34,529 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 74 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 938 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 1018 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 938 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 18:27:34,530 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 410 Invalid, 1018 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 938 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 18:27:34,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-12-06 18:27:34,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 70. [2021-12-06 18:27:34,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.0724637681159421) internal successors, (74), 69 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:27:34,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2021-12-06 18:27:34,537 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 61 [2021-12-06 18:27:34,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:27:34,537 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2021-12-06 18:27:34,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.2333333333333334) internal successors, (97), 30 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:27:34,538 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2021-12-06 18:27:34,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-06 18:27:34,538 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:27:34,538 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:27:34,558 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-12-06 18:27:34,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-06 18:27:34,739 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:27:34,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:27:34,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1425668434, now seen corresponding path program 15 times [2021-12-06 18:27:34,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:27:34,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950063037] [2021-12-06 18:27:34,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:27:34,742 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:27:34,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:34,951 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:27:34,951 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:27:34,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950063037] [2021-12-06 18:27:34,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950063037] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:27:34,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150875089] [2021-12-06 18:27:34,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 18:27:34,951 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:27:34,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:27:34,952 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:27:34,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-06 18:27:35,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-12-06 18:27:35,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:27:35,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-06 18:27:35,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:27:35,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 18:27:35,693 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-12-06 18:27:35,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 23 [2021-12-06 18:27:35,711 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 91 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:27:35,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:27:36,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-12-06 18:27:36,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2021-12-06 18:27:36,557 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 84 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:27:36,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150875089] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:27:36,557 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:27:36,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22, 22] total 52 [2021-12-06 18:27:36,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231217277] [2021-12-06 18:27:36,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:27:36,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-12-06 18:27:36,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:27:36,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-12-06 18:27:36,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=2322, Unknown=1, NotChecked=0, Total=2652 [2021-12-06 18:27:36,559 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand has 52 states, 52 states have (on average 2.923076923076923) internal successors, (152), 52 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:27:37,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:27:37,273 INFO L93 Difference]: Finished difference Result 107 states and 111 transitions. [2021-12-06 18:27:37,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-12-06 18:27:37,274 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.923076923076923) internal successors, (152), 52 states have internal predecessors, (152), 0 states have call successors, (0), 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 62 [2021-12-06 18:27:37,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:27:37,274 INFO L225 Difference]: With dead ends: 107 [2021-12-06 18:27:37,274 INFO L226 Difference]: Without dead ends: 71 [2021-12-06 18:27:37,277 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1356 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=781, Invalid=6190, Unknown=1, NotChecked=0, Total=6972 [2021-12-06 18:27:37,278 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 48 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 337 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:27:37,278 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 394 Invalid, 695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 332 Invalid, 0 Unknown, 337 Unchecked, 0.1s Time] [2021-12-06 18:27:37,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-12-06 18:27:37,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2021-12-06 18:27:37,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.0579710144927537) internal successors, (73), 69 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:27:37,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 73 transitions. [2021-12-06 18:27:37,285 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 73 transitions. Word has length 62 [2021-12-06 18:27:37,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:27:37,285 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 73 transitions. [2021-12-06 18:27:37,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.923076923076923) internal successors, (152), 52 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:27:37,286 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 73 transitions. [2021-12-06 18:27:37,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-06 18:27:37,286 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:27:37,286 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:27:37,306 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-12-06 18:27:37,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:27:37,488 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:27:37,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:27:37,489 INFO L85 PathProgramCache]: Analyzing trace with hash -1199724314, now seen corresponding path program 16 times [2021-12-06 18:27:37,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:27:37,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260497713] [2021-12-06 18:27:37,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:27:37,490 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:27:37,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:37,714 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 0 proven. 215 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:27:37,715 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:27:37,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260497713] [2021-12-06 18:27:37,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260497713] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:27:37,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344908676] [2021-12-06 18:27:37,715 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 18:27:37,715 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:27:37,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:27:37,716 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:27:37,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-06 18:27:37,762 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 18:27:37,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:27:37,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 44 conjunts are in the unsatisfiable core [2021-12-06 18:27:37,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:27:37,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 18:27:37,855 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-06 18:27:37,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2021-12-06 18:27:38,029 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 0 proven. 215 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:27:38,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:27:38,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-12-06 18:27:38,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-12-06 18:27:38,181 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 0 proven. 215 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:27:38,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344908676] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:27:38,181 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:27:38,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 22] total 32 [2021-12-06 18:27:38,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091418815] [2021-12-06 18:27:38,181 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:27:38,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-06 18:27:38,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:27:38,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-06 18:27:38,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=893, Unknown=0, NotChecked=0, Total=992 [2021-12-06 18:27:38,182 INFO L87 Difference]: Start difference. First operand 70 states and 73 transitions. Second operand has 32 states, 32 states have (on average 3.21875) internal successors, (103), 32 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:27:38,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:27:38,613 INFO L93 Difference]: Finished difference Result 118 states and 121 transitions. [2021-12-06 18:27:38,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-12-06 18:27:38,613 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.21875) internal successors, (103), 32 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-12-06 18:27:38,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:27:38,614 INFO L225 Difference]: With dead ends: 118 [2021-12-06 18:27:38,614 INFO L226 Difference]: Without dead ends: 116 [2021-12-06 18:27:38,615 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 116 SyntacticMatches, 7 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=235, Invalid=2315, Unknown=0, NotChecked=0, Total=2550 [2021-12-06 18:27:38,615 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 52 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 930 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 515 SdHoareTripleChecker+Invalid, 1020 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 930 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 18:27:38,615 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 515 Invalid, 1020 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 930 Invalid, 0 Unknown, 41 Unchecked, 0.2s Time] [2021-12-06 18:27:38,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-12-06 18:27:38,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 75. [2021-12-06 18:27:38,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.054054054054054) internal successors, (78), 74 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:27:38,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 78 transitions. [2021-12-06 18:27:38,621 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 78 transitions. Word has length 65 [2021-12-06 18:27:38,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:27:38,621 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 78 transitions. [2021-12-06 18:27:38,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.21875) internal successors, (103), 32 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:27:38,621 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 78 transitions. [2021-12-06 18:27:38,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-06 18:27:38,622 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:27:38,622 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:27:38,641 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-12-06 18:27:38,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:27:38,823 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:27:38,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:27:38,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1374347474, now seen corresponding path program 17 times [2021-12-06 18:27:38,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:27:38,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157036204] [2021-12-06 18:27:38,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:27:38,825 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:27:38,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:39,094 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 0 proven. 243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:27:39,095 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:27:39,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157036204] [2021-12-06 18:27:39,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157036204] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:27:39,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681211378] [2021-12-06 18:27:39,095 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 18:27:39,095 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:27:39,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:27:39,096 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:27:39,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-06 18:27:39,203 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-12-06 18:27:39,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:27:39,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 47 conjunts are in the unsatisfiable core [2021-12-06 18:27:39,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:27:39,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 18:27:39,296 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 18:27:39,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-06 18:27:39,328 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 18:27:39,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-06 18:27:39,525 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 2 proven. 241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:27:39,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:27:39,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-12-06 18:27:39,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-12-06 18:27:39,748 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:27:39,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681211378] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:27:39,748 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:27:39,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 23] total 33 [2021-12-06 18:27:39,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808190569] [2021-12-06 18:27:39,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:27:39,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-06 18:27:39,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:27:39,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-06 18:27:39,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=951, Unknown=0, NotChecked=0, Total=1056 [2021-12-06 18:27:39,750 INFO L87 Difference]: Start difference. First operand 75 states and 78 transitions. Second operand has 33 states, 33 states have (on average 3.272727272727273) internal successors, (108), 33 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:27:40,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:27:40,257 INFO L93 Difference]: Finished difference Result 116 states and 119 transitions. [2021-12-06 18:27:40,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-06 18:27:40,257 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.272727272727273) internal successors, (108), 33 states have internal predecessors, (108), 0 states have call successors, (0), 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 68 [2021-12-06 18:27:40,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:27:40,258 INFO L225 Difference]: With dead ends: 116 [2021-12-06 18:27:40,258 INFO L226 Difference]: Without dead ends: 114 [2021-12-06 18:27:40,259 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 118 SyntacticMatches, 9 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=248, Invalid=2614, Unknown=0, NotChecked=0, Total=2862 [2021-12-06 18:27:40,260 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 54 mSDsluCounter, 492 mSDsCounter, 0 mSdLazyCounter, 1245 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 521 SdHoareTripleChecker+Invalid, 1314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 18:27:40,260 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 521 Invalid, 1314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1245 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 18:27:40,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-12-06 18:27:40,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 74. [2021-12-06 18:27:40,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.0547945205479452) internal successors, (77), 73 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:27:40,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 77 transitions. [2021-12-06 18:27:40,268 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 77 transitions. Word has length 68 [2021-12-06 18:27:40,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:27:40,268 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 77 transitions. [2021-12-06 18:27:40,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.272727272727273) internal successors, (108), 33 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:27:40,268 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 77 transitions. [2021-12-06 18:27:40,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-06 18:27:40,269 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:27:40,269 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:27:40,289 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-12-06 18:27:40,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:27:40,470 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:27:40,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:27:40,471 INFO L85 PathProgramCache]: Analyzing trace with hash -2030424676, now seen corresponding path program 18 times [2021-12-06 18:27:40,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:27:40,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740205240] [2021-12-06 18:27:40,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:27:40,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:27:40,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:40,753 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:27:40,753 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:27:40,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740205240] [2021-12-06 18:27:40,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740205240] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:27:40,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522045301] [2021-12-06 18:27:40,754 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 18:27:40,754 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:27:40,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:27:40,754 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:27:40,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-06 18:27:41,005 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-12-06 18:27:41,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:27:41,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-06 18:27:41,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:27:41,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 18:27:41,661 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-12-06 18:27:41,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 23 [2021-12-06 18:27:41,682 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 120 proven. 125 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:27:41,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:27:42,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-12-06 18:27:42,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2021-12-06 18:27:42,359 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 112 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:27:42,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522045301] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:27:42,360 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:27:42,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24, 24] total 57 [2021-12-06 18:27:42,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110935866] [2021-12-06 18:27:42,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:27:42,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-12-06 18:27:42,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:27:42,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-12-06 18:27:42,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=387, Invalid=2805, Unknown=0, NotChecked=0, Total=3192 [2021-12-06 18:27:42,362 INFO L87 Difference]: Start difference. First operand 74 states and 77 transitions. Second operand has 57 states, 57 states have (on average 2.982456140350877) internal successors, (170), 57 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:27:43,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:27:43,054 INFO L93 Difference]: Finished difference Result 115 states and 118 transitions. [2021-12-06 18:27:43,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-12-06 18:27:43,054 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.982456140350877) internal successors, (170), 57 states have internal predecessors, (170), 0 states have call successors, (0), 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 69 [2021-12-06 18:27:43,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:27:43,055 INFO L225 Difference]: With dead ends: 115 [2021-12-06 18:27:43,055 INFO L226 Difference]: Without dead ends: 75 [2021-12-06 18:27:43,057 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 119 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1347 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=779, Invalid=6361, Unknown=0, NotChecked=0, Total=7140 [2021-12-06 18:27:43,057 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 36 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 113 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:27:43,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 429 Invalid, 596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 458 Invalid, 0 Unknown, 113 Unchecked, 0.1s Time] [2021-12-06 18:27:43,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-12-06 18:27:43,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2021-12-06 18:27:43,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.0410958904109588) internal successors, (76), 73 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:27:43,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2021-12-06 18:27:43,064 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 69 [2021-12-06 18:27:43,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:27:43,064 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2021-12-06 18:27:43,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.982456140350877) internal successors, (170), 57 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:27:43,064 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2021-12-06 18:27:43,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-06 18:27:43,065 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:27:43,065 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:27:43,068 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-12-06 18:27:43,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:27:43,266 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:27:43,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:27:43,267 INFO L85 PathProgramCache]: Analyzing trace with hash -1242460280, now seen corresponding path program 19 times [2021-12-06 18:27:43,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:27:43,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198927924] [2021-12-06 18:27:43,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:27:43,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:27:43,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:43,539 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:27:43,539 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:27:43,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198927924] [2021-12-06 18:27:43,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198927924] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:27:43,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551188542] [2021-12-06 18:27:43,540 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 18:27:43,540 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:27:43,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:27:43,540 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:27:43,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-06 18:27:43,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:43,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 48 conjunts are in the unsatisfiable core [2021-12-06 18:27:43,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:27:43,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 18:27:43,719 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-06 18:27:43,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2021-12-06 18:27:43,941 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:27:43,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:27:44,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-12-06 18:27:44,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-12-06 18:27:44,100 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:27:44,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551188542] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:27:44,101 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:27:44,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 24] total 35 [2021-12-06 18:27:44,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455258995] [2021-12-06 18:27:44,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:27:44,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-06 18:27:44,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:27:44,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-06 18:27:44,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1081, Unknown=0, NotChecked=0, Total=1190 [2021-12-06 18:27:44,102 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand has 35 states, 35 states have (on average 3.257142857142857) internal successors, (114), 35 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:27:44,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:27:44,743 INFO L93 Difference]: Finished difference Result 131 states and 134 transitions. [2021-12-06 18:27:44,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-12-06 18:27:44,743 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.257142857142857) internal successors, (114), 35 states have internal predecessors, (114), 0 states have call successors, (0), 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 72 [2021-12-06 18:27:44,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:27:44,744 INFO L225 Difference]: With dead ends: 131 [2021-12-06 18:27:44,744 INFO L226 Difference]: Without dead ends: 129 [2021-12-06 18:27:44,745 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 126 SyntacticMatches, 7 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 930 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=294, Invalid=3866, Unknown=0, NotChecked=0, Total=4160 [2021-12-06 18:27:44,745 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 96 mSDsluCounter, 649 mSDsCounter, 0 mSdLazyCounter, 1375 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 680 SdHoareTripleChecker+Invalid, 1485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 1375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 18:27:44,746 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 680 Invalid, 1485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 1375 Invalid, 0 Unknown, 5 Unchecked, 0.4s Time] [2021-12-06 18:27:44,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-12-06 18:27:44,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 81. [2021-12-06 18:27:44,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.05) internal successors, (84), 80 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:27:44,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 84 transitions. [2021-12-06 18:27:44,752 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 84 transitions. Word has length 72 [2021-12-06 18:27:44,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:27:44,753 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 84 transitions. [2021-12-06 18:27:44,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.257142857142857) internal successors, (114), 35 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:27:44,753 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 84 transitions. [2021-12-06 18:27:44,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-06 18:27:44,753 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:27:44,753 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:27:44,772 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-12-06 18:27:44,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-12-06 18:27:44,955 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:27:44,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:27:44,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1441011814, now seen corresponding path program 2 times [2021-12-06 18:27:44,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:27:44,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847664431] [2021-12-06 18:27:44,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:27:44,957 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:27:44,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:45,049 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 21 proven. 155 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-12-06 18:27:45,050 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:27:45,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847664431] [2021-12-06 18:27:45,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847664431] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:27:45,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139866398] [2021-12-06 18:27:45,050 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:27:45,050 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:27:45,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:27:45,051 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:27:45,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-06 18:27:45,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 18:27:45,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:27:45,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-06 18:27:45,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:27:45,157 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 21 proven. 155 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-12-06 18:27:45,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:27:45,360 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 21 proven. 155 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-12-06 18:27:45,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139866398] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:27:45,360 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:27:45,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2021-12-06 18:27:45,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110748232] [2021-12-06 18:27:45,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:27:45,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-06 18:27:45,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:27:45,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-06 18:27:45,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-12-06 18:27:45,362 INFO L87 Difference]: Start difference. First operand 81 states and 84 transitions. Second operand has 25 states, 25 states have (on average 3.32) internal successors, (83), 25 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:27:45,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:27:45,501 INFO L93 Difference]: Finished difference Result 283 states and 311 transitions. [2021-12-06 18:27:45,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-06 18:27:45,501 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.32) internal successors, (83), 25 states have internal predecessors, (83), 0 states have call successors, (0), 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 75 [2021-12-06 18:27:45,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:27:45,502 INFO L225 Difference]: With dead ends: 283 [2021-12-06 18:27:45,502 INFO L226 Difference]: Without dead ends: 243 [2021-12-06 18:27:45,503 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-12-06 18:27:45,503 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 278 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:27:45,503 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 102 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 18:27:45,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-12-06 18:27:45,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 115. [2021-12-06 18:27:45,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.131578947368421) internal successors, (129), 114 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:27:45,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 129 transitions. [2021-12-06 18:27:45,512 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 129 transitions. Word has length 75 [2021-12-06 18:27:45,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:27:45,512 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 129 transitions. [2021-12-06 18:27:45,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.32) internal successors, (83), 25 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:27:45,513 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 129 transitions. [2021-12-06 18:27:45,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-06 18:27:45,513 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:27:45,513 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:27:45,533 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-12-06 18:27:45,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:27:45,714 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:27:45,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:27:45,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1008588316, now seen corresponding path program 20 times [2021-12-06 18:27:45,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:27:45,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358369086] [2021-12-06 18:27:45,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:27:45,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:27:45,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:45,977 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 0 proven. 304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:27:45,977 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:27:45,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358369086] [2021-12-06 18:27:45,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358369086] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:27:45,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518561626] [2021-12-06 18:27:45,978 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:27:45,978 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:27:45,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:27:45,979 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:27:45,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-06 18:27:46,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 18:27:46,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:27:46,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 51 conjunts are in the unsatisfiable core [2021-12-06 18:27:46,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:27:46,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 18:27:46,120 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 18:27:46,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-06 18:27:46,146 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 18:27:46,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-06 18:27:46,350 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 2 proven. 302 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:27:46,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:27:46,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-12-06 18:27:46,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-12-06 18:27:46,563 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 0 proven. 303 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:27:46,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518561626] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:27:46,563 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:27:46,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 25] total 36 [2021-12-06 18:27:46,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608510124] [2021-12-06 18:27:46,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:27:46,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-06 18:27:46,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:27:46,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-06 18:27:46,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1145, Unknown=0, NotChecked=0, Total=1260 [2021-12-06 18:27:46,564 INFO L87 Difference]: Start difference. First operand 115 states and 129 transitions. Second operand has 36 states, 36 states have (on average 3.3055555555555554) internal successors, (119), 36 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:27:47,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:27:47,165 INFO L93 Difference]: Finished difference Result 160 states and 174 transitions. [2021-12-06 18:27:47,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-12-06 18:27:47,165 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.3055555555555554) internal successors, (119), 36 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-12-06 18:27:47,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:27:47,166 INFO L225 Difference]: With dead ends: 160 [2021-12-06 18:27:47,166 INFO L226 Difference]: Without dead ends: 158 [2021-12-06 18:27:47,167 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 131 SyntacticMatches, 9 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 737 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=270, Invalid=3152, Unknown=0, NotChecked=0, Total=3422 [2021-12-06 18:27:47,167 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 65 mSDsluCounter, 569 mSDsCounter, 0 mSdLazyCounter, 1369 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 600 SdHoareTripleChecker+Invalid, 1448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 18:27:47,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 600 Invalid, 1448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1369 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 18:27:47,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-12-06 18:27:47,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 114. [2021-12-06 18:27:47,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.1327433628318584) internal successors, (128), 113 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:27:47,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 128 transitions. [2021-12-06 18:27:47,176 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 128 transitions. Word has length 75 [2021-12-06 18:27:47,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:27:47,177 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 128 transitions. [2021-12-06 18:27:47,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.3055555555555554) internal successors, (119), 36 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:27:47,177 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 128 transitions. [2021-12-06 18:27:47,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-12-06 18:27:47,177 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:27:47,177 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:27:47,199 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-12-06 18:27:47,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-12-06 18:27:47,378 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:27:47,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:27:47,379 INFO L85 PathProgramCache]: Analyzing trace with hash 1156969278, now seen corresponding path program 21 times [2021-12-06 18:27:47,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:27:47,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738005247] [2021-12-06 18:27:47,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:27:47,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:27:47,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:47,648 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 0 proven. 307 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:27:47,648 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:27:47,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738005247] [2021-12-06 18:27:47,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738005247] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:27:47,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802334720] [2021-12-06 18:27:47,648 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 18:27:47,648 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:27:47,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:27:47,649 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:27:47,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-06 18:27:47,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-12-06 18:27:47,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:27:47,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-06 18:27:47,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:27:48,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 18:27:48,603 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-12-06 18:27:48,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 23 [2021-12-06 18:27:48,621 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 153 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:27:48,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:27:49,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-12-06 18:27:49,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2021-12-06 18:27:49,410 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 144 proven. 163 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:27:49,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802334720] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:27:49,410 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:27:49,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26, 26] total 62 [2021-12-06 18:27:49,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172144631] [2021-12-06 18:27:49,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:27:49,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2021-12-06 18:27:49,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:27:49,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-12-06 18:27:49,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=450, Invalid=3332, Unknown=0, NotChecked=0, Total=3782 [2021-12-06 18:27:49,412 INFO L87 Difference]: Start difference. First operand 114 states and 128 transitions. Second operand has 62 states, 62 states have (on average 3.032258064516129) internal successors, (188), 62 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:27:50,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:27:50,189 INFO L93 Difference]: Finished difference Result 159 states and 173 transitions. [2021-12-06 18:27:50,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-12-06 18:27:50,189 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 3.032258064516129) internal successors, (188), 62 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-12-06 18:27:50,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:27:50,191 INFO L225 Difference]: With dead ends: 159 [2021-12-06 18:27:50,191 INFO L226 Difference]: Without dead ends: 115 [2021-12-06 18:27:50,192 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 133 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1596 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=905, Invalid=7651, Unknown=0, NotChecked=0, Total=8556 [2021-12-06 18:27:50,193 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 69 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 130 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:27:50,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 553 Invalid, 647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 501 Invalid, 0 Unknown, 130 Unchecked, 0.1s Time] [2021-12-06 18:27:50,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-12-06 18:27:50,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2021-12-06 18:27:50,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.1238938053097345) internal successors, (127), 113 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:27:50,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 127 transitions. [2021-12-06 18:27:50,203 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 127 transitions. Word has length 76 [2021-12-06 18:27:50,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:27:50,203 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 127 transitions. [2021-12-06 18:27:50,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 3.032258064516129) internal successors, (188), 62 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:27:50,203 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 127 transitions. [2021-12-06 18:27:50,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-06 18:27:50,204 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:27:50,204 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:27:50,223 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-12-06 18:27:50,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-12-06 18:27:50,405 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:27:50,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:27:50,406 INFO L85 PathProgramCache]: Analyzing trace with hash -1212887086, now seen corresponding path program 22 times [2021-12-06 18:27:50,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:27:50,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989013707] [2021-12-06 18:27:50,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:27:50,407 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:27:50,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:50,706 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:27:50,706 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:27:50,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989013707] [2021-12-06 18:27:50,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989013707] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:27:50,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942214503] [2021-12-06 18:27:50,707 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 18:27:50,707 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:27:50,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:27:50,708 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:27:50,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-12-06 18:27:50,768 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 18:27:50,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:27:50,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 52 conjunts are in the unsatisfiable core [2021-12-06 18:27:50,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:27:50,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 18:27:50,882 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-06 18:27:50,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2021-12-06 18:27:51,116 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:27:51,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:27:51,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-12-06 18:27:51,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-12-06 18:27:51,312 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:27:51,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942214503] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:27:51,312 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:27:51,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 26] total 38 [2021-12-06 18:27:51,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580687636] [2021-12-06 18:27:51,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:27:51,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-12-06 18:27:51,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:27:51,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-12-06 18:27:51,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1287, Unknown=0, NotChecked=0, Total=1406 [2021-12-06 18:27:51,313 INFO L87 Difference]: Start difference. First operand 114 states and 127 transitions. Second operand has 38 states, 38 states have (on average 3.289473684210526) internal successors, (125), 38 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:27:52,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:27:52,062 INFO L93 Difference]: Finished difference Result 173 states and 186 transitions. [2021-12-06 18:27:52,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-12-06 18:27:52,062 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.289473684210526) internal successors, (125), 38 states have internal predecessors, (125), 0 states have call successors, (0), 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 79 [2021-12-06 18:27:52,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:27:52,063 INFO L225 Difference]: With dead ends: 173 [2021-12-06 18:27:52,063 INFO L226 Difference]: Without dead ends: 171 [2021-12-06 18:27:52,064 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 139 SyntacticMatches, 7 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1110 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=321, Invalid=4649, Unknown=0, NotChecked=0, Total=4970 [2021-12-06 18:27:52,064 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 126 mSDsluCounter, 698 mSDsCounter, 0 mSdLazyCounter, 1473 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 731 SdHoareTripleChecker+Invalid, 1612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 1473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 18:27:52,064 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 731 Invalid, 1612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 1473 Invalid, 0 Unknown, 5 Unchecked, 0.4s Time] [2021-12-06 18:27:52,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-12-06 18:27:52,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 119. [2021-12-06 18:27:52,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 1.11864406779661) internal successors, (132), 118 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:27:52,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 132 transitions. [2021-12-06 18:27:52,075 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 132 transitions. Word has length 79 [2021-12-06 18:27:52,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:27:52,075 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 132 transitions. [2021-12-06 18:27:52,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.289473684210526) internal successors, (125), 38 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:27:52,075 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 132 transitions. [2021-12-06 18:27:52,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-06 18:27:52,075 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:27:52,076 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:27:52,095 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-12-06 18:27:52,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-12-06 18:27:52,277 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:27:52,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:27:52,278 INFO L85 PathProgramCache]: Analyzing trace with hash -931415362, now seen corresponding path program 23 times [2021-12-06 18:27:52,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:27:52,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092618724] [2021-12-06 18:27:52,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:27:52,279 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:27:52,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:52,566 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 0 proven. 372 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:27:52,566 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:27:52,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092618724] [2021-12-06 18:27:52,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092618724] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:27:52,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85279172] [2021-12-06 18:27:52,567 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 18:27:52,567 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:27:52,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:27:52,567 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:27:52,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-12-06 18:27:52,701 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-12-06 18:27:52,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:27:52,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 55 conjunts are in the unsatisfiable core [2021-12-06 18:27:52,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:27:52,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 18:27:52,798 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 18:27:52,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-06 18:27:52,828 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 18:27:52,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-06 18:27:53,059 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 2 proven. 370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:27:53,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:27:53,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-12-06 18:27:53,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-12-06 18:27:53,275 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 0 proven. 371 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:27:53,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85279172] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:27:53,275 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:27:53,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 27] total 39 [2021-12-06 18:27:53,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234369725] [2021-12-06 18:27:53,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:27:53,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-06 18:27:53,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:27:53,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-06 18:27:53,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1357, Unknown=0, NotChecked=0, Total=1482 [2021-12-06 18:27:53,276 INFO L87 Difference]: Start difference. First operand 119 states and 132 transitions. Second operand has 39 states, 39 states have (on average 3.3333333333333335) internal successors, (130), 39 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:27:53,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:27:53,925 INFO L93 Difference]: Finished difference Result 168 states and 181 transitions. [2021-12-06 18:27:53,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-12-06 18:27:53,925 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.3333333333333335) internal successors, (130), 39 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-12-06 18:27:53,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:27:53,926 INFO L225 Difference]: With dead ends: 168 [2021-12-06 18:27:53,926 INFO L226 Difference]: Without dead ends: 166 [2021-12-06 18:27:53,927 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 144 SyntacticMatches, 9 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 858 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=292, Invalid=3740, Unknown=0, NotChecked=0, Total=4032 [2021-12-06 18:27:53,927 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 102 mSDsluCounter, 674 mSDsCounter, 0 mSdLazyCounter, 1577 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 707 SdHoareTripleChecker+Invalid, 1691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 1577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 18:27:53,927 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 707 Invalid, 1691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1577 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 18:27:53,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-12-06 18:27:53,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 118. [2021-12-06 18:27:53,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 1.1196581196581197) internal successors, (131), 117 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:27:53,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 131 transitions. [2021-12-06 18:27:53,938 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 131 transitions. Word has length 82 [2021-12-06 18:27:53,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:27:53,938 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 131 transitions. [2021-12-06 18:27:53,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.3333333333333335) internal successors, (130), 39 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:27:53,939 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 131 transitions. [2021-12-06 18:27:53,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-06 18:27:53,939 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:27:53,939 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:27:53,960 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-12-06 18:27:54,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:27:54,140 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:27:54,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:27:54,141 INFO L85 PathProgramCache]: Analyzing trace with hash 925630088, now seen corresponding path program 24 times [2021-12-06 18:27:54,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:27:54,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94964938] [2021-12-06 18:27:54,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:27:54,142 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:27:54,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:54,423 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:27:54,423 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:27:54,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94964938] [2021-12-06 18:27:54,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94964938] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:27:54,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960095227] [2021-12-06 18:27:54,424 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 18:27:54,424 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:27:54,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:27:54,424 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:27:54,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-12-06 18:27:55,003 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-12-06 18:27:55,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:27:55,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-06 18:27:55,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:27:55,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 18:27:55,856 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-12-06 18:27:55,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 23 [2021-12-06 18:27:55,877 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 190 proven. 186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:27:55,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:27:56,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-12-06 18:27:56,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2021-12-06 18:27:56,728 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 180 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:27:56,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960095227] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:27:56,729 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:27:56,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 28, 28] total 67 [2021-12-06 18:27:56,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978882355] [2021-12-06 18:27:56,729 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:27:56,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2021-12-06 18:27:56,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:27:56,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-12-06 18:27:56,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=518, Invalid=3904, Unknown=0, NotChecked=0, Total=4422 [2021-12-06 18:27:56,730 INFO L87 Difference]: Start difference. First operand 118 states and 131 transitions. Second operand has 67 states, 67 states have (on average 3.074626865671642) internal successors, (206), 67 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:27:57,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:27:57,700 INFO L93 Difference]: Finished difference Result 167 states and 180 transitions. [2021-12-06 18:27:57,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-12-06 18:27:57,700 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 3.074626865671642) internal successors, (206), 67 states have internal predecessors, (206), 0 states have call successors, (0), 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 83 [2021-12-06 18:27:57,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:27:57,701 INFO L225 Difference]: With dead ends: 167 [2021-12-06 18:27:57,701 INFO L226 Difference]: Without dead ends: 119 [2021-12-06 18:27:57,702 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 145 SyntacticMatches, 1 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1866 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1040, Invalid=9060, Unknown=0, NotChecked=0, Total=10100 [2021-12-06 18:27:57,702 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 66 mSDsluCounter, 546 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 575 SdHoareTripleChecker+Invalid, 666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 135 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:27:57,702 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 575 Invalid, 666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 503 Invalid, 0 Unknown, 135 Unchecked, 0.1s Time] [2021-12-06 18:27:57,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-12-06 18:27:57,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 118. [2021-12-06 18:27:57,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 1.1111111111111112) internal successors, (130), 117 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:27:57,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 130 transitions. [2021-12-06 18:27:57,714 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 130 transitions. Word has length 83 [2021-12-06 18:27:57,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:27:57,714 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 130 transitions. [2021-12-06 18:27:57,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 3.074626865671642) internal successors, (206), 67 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:27:57,714 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 130 transitions. [2021-12-06 18:27:57,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-12-06 18:27:57,714 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:27:57,714 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:27:57,718 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2021-12-06 18:27:57,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-12-06 18:27:57,915 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:27:57,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:27:57,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1667994484, now seen corresponding path program 25 times [2021-12-06 18:27:57,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:27:57,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793577730] [2021-12-06 18:27:57,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:27:57,918 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:27:57,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:58,255 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 0 proven. 410 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:27:58,255 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:27:58,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793577730] [2021-12-06 18:27:58,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793577730] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:27:58,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702587021] [2021-12-06 18:27:58,256 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 18:27:58,256 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:27:58,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:27:58,257 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:27:58,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-12-06 18:27:58,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:27:58,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 56 conjunts are in the unsatisfiable core [2021-12-06 18:27:58,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:27:58,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 18:27:58,462 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-06 18:27:58,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2021-12-06 18:27:58,758 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 0 proven. 410 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:27:58,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:27:58,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-12-06 18:27:58,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-12-06 18:27:58,962 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 0 proven. 410 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:27:58,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702587021] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:27:58,962 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:27:58,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 28] total 41 [2021-12-06 18:27:58,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879214014] [2021-12-06 18:27:58,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:27:58,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-12-06 18:27:58,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:27:58,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-12-06 18:27:58,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1511, Unknown=0, NotChecked=0, Total=1640 [2021-12-06 18:27:58,964 INFO L87 Difference]: Start difference. First operand 118 states and 130 transitions. Second operand has 41 states, 41 states have (on average 3.317073170731707) internal successors, (136), 41 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:27:59,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:27:59,775 INFO L93 Difference]: Finished difference Result 181 states and 193 transitions. [2021-12-06 18:27:59,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-12-06 18:27:59,776 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.317073170731707) internal successors, (136), 41 states have internal predecessors, (136), 0 states have call successors, (0), 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 86 [2021-12-06 18:27:59,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:27:59,776 INFO L225 Difference]: With dead ends: 181 [2021-12-06 18:27:59,777 INFO L226 Difference]: Without dead ends: 179 [2021-12-06 18:27:59,777 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 152 SyntacticMatches, 7 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1262 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=338, Invalid=5362, Unknown=0, NotChecked=0, Total=5700 [2021-12-06 18:27:59,778 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 106 mSDsluCounter, 752 mSDsCounter, 0 mSdLazyCounter, 1749 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 785 SdHoareTripleChecker+Invalid, 1885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 1749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 8 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 18:27:59,778 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 785 Invalid, 1885 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 1749 Invalid, 0 Unknown, 8 Unchecked, 0.4s Time] [2021-12-06 18:27:59,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-12-06 18:27:59,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 123. [2021-12-06 18:27:59,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 1.1065573770491803) internal successors, (135), 122 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:27:59,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 135 transitions. [2021-12-06 18:27:59,791 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 135 transitions. Word has length 86 [2021-12-06 18:27:59,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:27:59,791 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 135 transitions. [2021-12-06 18:27:59,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.317073170731707) internal successors, (136), 41 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:27:59,791 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 135 transitions. [2021-12-06 18:27:59,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-12-06 18:27:59,791 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:27:59,791 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:27:59,812 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-12-06 18:27:59,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:27:59,992 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:27:59,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:27:59,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1635858680, now seen corresponding path program 26 times [2021-12-06 18:27:59,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:27:59,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847395410] [2021-12-06 18:27:59,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:27:59,994 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:28:00,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:00,343 INFO L134 CoverageAnalysis]: Checked inductivity of 447 backedges. 0 proven. 447 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:28:00,344 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:28:00,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847395410] [2021-12-06 18:28:00,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847395410] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:28:00,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280865962] [2021-12-06 18:28:00,344 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:28:00,344 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:28:00,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:28:00,344 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:28:00,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-12-06 18:28:00,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 18:28:00,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:28:00,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 59 conjunts are in the unsatisfiable core [2021-12-06 18:28:00,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:28:00,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 18:28:00,515 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 18:28:00,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-06 18:28:00,546 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 18:28:00,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-06 18:28:00,843 INFO L134 CoverageAnalysis]: Checked inductivity of 447 backedges. 2 proven. 445 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:28:00,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:28:01,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-12-06 18:28:01,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-12-06 18:28:01,102 INFO L134 CoverageAnalysis]: Checked inductivity of 447 backedges. 0 proven. 446 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:28:01,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280865962] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:28:01,102 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:28:01,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 29] total 42 [2021-12-06 18:28:01,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168946573] [2021-12-06 18:28:01,103 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:28:01,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-12-06 18:28:01,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:28:01,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-12-06 18:28:01,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1587, Unknown=0, NotChecked=0, Total=1722 [2021-12-06 18:28:01,103 INFO L87 Difference]: Start difference. First operand 123 states and 135 transitions. Second operand has 42 states, 42 states have (on average 3.357142857142857) internal successors, (141), 42 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:28:01,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:28:01,891 INFO L93 Difference]: Finished difference Result 176 states and 188 transitions. [2021-12-06 18:28:01,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-12-06 18:28:01,892 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.357142857142857) internal successors, (141), 42 states have internal predecessors, (141), 0 states have call successors, (0), 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 89 [2021-12-06 18:28:01,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:28:01,893 INFO L225 Difference]: With dead ends: 176 [2021-12-06 18:28:01,893 INFO L226 Difference]: Without dead ends: 174 [2021-12-06 18:28:01,893 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 157 SyntacticMatches, 9 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 988 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=314, Invalid=4378, Unknown=0, NotChecked=0, Total=4692 [2021-12-06 18:28:01,894 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 108 mSDsluCounter, 818 mSDsCounter, 0 mSdLazyCounter, 1955 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 853 SdHoareTripleChecker+Invalid, 2080 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 1955 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 18:28:01,894 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 853 Invalid, 2080 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 1955 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 18:28:01,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-12-06 18:28:01,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 122. [2021-12-06 18:28:01,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 1.1074380165289257) internal successors, (134), 121 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:28:01,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 134 transitions. [2021-12-06 18:28:01,907 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 134 transitions. Word has length 89 [2021-12-06 18:28:01,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:28:01,907 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 134 transitions. [2021-12-06 18:28:01,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.357142857142857) internal successors, (141), 42 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:28:01,907 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 134 transitions. [2021-12-06 18:28:01,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-06 18:28:01,908 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:28:01,908 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:28:01,928 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2021-12-06 18:28:02,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:28:02,109 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:28:02,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:28:02,110 INFO L85 PathProgramCache]: Analyzing trace with hash -592174806, now seen corresponding path program 27 times [2021-12-06 18:28:02,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:28:02,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323462620] [2021-12-06 18:28:02,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:28:02,111 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:28:02,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:02,414 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 0 proven. 452 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:28:02,414 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:28:02,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323462620] [2021-12-06 18:28:02,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323462620] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:28:02,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610633414] [2021-12-06 18:28:02,414 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 18:28:02,414 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:28:02,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:28:02,415 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:28:02,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-12-06 18:28:02,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-12-06 18:28:02,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:28:02,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-06 18:28:02,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:28:02,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 18:28:03,704 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-12-06 18:28:03,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 23 [2021-12-06 18:28:03,729 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 231 proven. 221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:28:03,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:28:04,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-12-06 18:28:04,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2021-12-06 18:28:04,761 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 220 proven. 232 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:28:04,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610633414] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:28:04,762 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:28:04,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 30, 30] total 72 [2021-12-06 18:28:04,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857748139] [2021-12-06 18:28:04,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:28:04,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2021-12-06 18:28:04,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:28:04,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-12-06 18:28:04,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=591, Invalid=4521, Unknown=0, NotChecked=0, Total=5112 [2021-12-06 18:28:04,763 INFO L87 Difference]: Start difference. First operand 122 states and 134 transitions. Second operand has 72 states, 72 states have (on average 3.111111111111111) internal successors, (224), 72 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:28:05,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:28:05,888 INFO L93 Difference]: Finished difference Result 175 states and 187 transitions. [2021-12-06 18:28:05,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-12-06 18:28:05,888 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 3.111111111111111) internal successors, (224), 72 states have internal predecessors, (224), 0 states have call successors, (0), 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 90 [2021-12-06 18:28:05,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:28:05,889 INFO L225 Difference]: With dead ends: 175 [2021-12-06 18:28:05,889 INFO L226 Difference]: Without dead ends: 123 [2021-12-06 18:28:05,890 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 160 SyntacticMatches, 1 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2157 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1184, Invalid=10588, Unknown=0, NotChecked=0, Total=11772 [2021-12-06 18:28:05,890 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 67 mSDsluCounter, 588 mSDsCounter, 0 mSdLazyCounter, 616 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 620 SdHoareTripleChecker+Invalid, 889 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 256 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 18:28:05,890 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 620 Invalid, 889 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 616 Invalid, 0 Unknown, 256 Unchecked, 0.2s Time] [2021-12-06 18:28:05,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-12-06 18:28:05,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 122. [2021-12-06 18:28:05,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 1.0991735537190082) internal successors, (133), 121 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:28:05,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 133 transitions. [2021-12-06 18:28:05,904 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 133 transitions. Word has length 90 [2021-12-06 18:28:05,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:28:05,904 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 133 transitions. [2021-12-06 18:28:05,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 3.111111111111111) internal successors, (224), 72 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:28:05,904 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 133 transitions. [2021-12-06 18:28:05,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-06 18:28:05,905 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:28:05,905 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:28:05,925 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2021-12-06 18:28:06,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-12-06 18:28:06,106 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:28:06,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:28:06,107 INFO L85 PathProgramCache]: Analyzing trace with hash 756771518, now seen corresponding path program 28 times [2021-12-06 18:28:06,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:28:06,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813371843] [2021-12-06 18:28:06,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:28:06,108 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:28:06,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:06,470 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 0 proven. 489 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:28:06,470 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:28:06,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813371843] [2021-12-06 18:28:06,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813371843] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:28:06,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832884948] [2021-12-06 18:28:06,471 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 18:28:06,471 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:28:06,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:28:06,471 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:28:06,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-12-06 18:28:06,537 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 18:28:06,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:28:06,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 60 conjunts are in the unsatisfiable core [2021-12-06 18:28:06,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:28:06,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 18:28:06,663 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-06 18:28:06,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2021-12-06 18:28:06,993 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 0 proven. 489 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:28:06,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:28:07,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-12-06 18:28:07,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-12-06 18:28:07,204 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 0 proven. 489 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:28:07,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832884948] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:28:07,204 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:28:07,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 30] total 44 [2021-12-06 18:28:07,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671753554] [2021-12-06 18:28:07,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:28:07,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-12-06 18:28:07,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:28:07,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-12-06 18:28:07,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1753, Unknown=0, NotChecked=0, Total=1892 [2021-12-06 18:28:07,205 INFO L87 Difference]: Start difference. First operand 122 states and 133 transitions. Second operand has 44 states, 44 states have (on average 3.340909090909091) internal successors, (147), 44 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:28:08,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:28:08,184 INFO L93 Difference]: Finished difference Result 189 states and 200 transitions. [2021-12-06 18:28:08,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-12-06 18:28:08,184 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.340909090909091) internal successors, (147), 44 states have internal predecessors, (147), 0 states have call successors, (0), 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 93 [2021-12-06 18:28:08,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:28:08,185 INFO L225 Difference]: With dead ends: 189 [2021-12-06 18:28:08,185 INFO L226 Difference]: Without dead ends: 187 [2021-12-06 18:28:08,186 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 165 SyntacticMatches, 7 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1518 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=375, Invalid=6431, Unknown=0, NotChecked=0, Total=6806 [2021-12-06 18:28:08,186 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 122 mSDsluCounter, 981 mSDsCounter, 0 mSdLazyCounter, 2128 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 1018 SdHoareTripleChecker+Invalid, 2272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 2128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 18:28:08,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 1018 Invalid, 2272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 2128 Invalid, 0 Unknown, 5 Unchecked, 0.5s Time] [2021-12-06 18:28:08,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-12-06 18:28:08,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 127. [2021-12-06 18:28:08,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 1.0952380952380953) internal successors, (138), 126 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:28:08,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 138 transitions. [2021-12-06 18:28:08,201 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 138 transitions. Word has length 93 [2021-12-06 18:28:08,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:28:08,201 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 138 transitions. [2021-12-06 18:28:08,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.340909090909091) internal successors, (147), 44 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:28:08,202 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 138 transitions. [2021-12-06 18:28:08,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-12-06 18:28:08,202 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:28:08,202 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:28:08,222 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-12-06 18:28:08,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-12-06 18:28:08,403 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:28:08,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:28:08,403 INFO L85 PathProgramCache]: Analyzing trace with hash -792278870, now seen corresponding path program 29 times [2021-12-06 18:28:08,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:28:08,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514026700] [2021-12-06 18:28:08,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:28:08,403 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:28:08,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:08,719 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:28:08,719 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:28:08,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514026700] [2021-12-06 18:28:08,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514026700] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:28:08,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335372657] [2021-12-06 18:28:08,720 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 18:28:08,720 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:28:08,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:28:08,720 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:28:08,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-12-06 18:28:08,964 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-12-06 18:28:08,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:28:08,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 63 conjunts are in the unsatisfiable core [2021-12-06 18:28:08,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:28:09,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 18:28:09,075 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 18:28:09,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-06 18:28:09,105 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 18:28:09,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-06 18:28:09,415 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 2 proven. 527 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:28:09,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:28:09,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-12-06 18:28:09,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-12-06 18:28:09,676 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:28:09,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335372657] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:28:09,677 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:28:09,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 31] total 45 [2021-12-06 18:28:09,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362738610] [2021-12-06 18:28:09,677 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:28:09,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-12-06 18:28:09,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:28:09,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-12-06 18:28:09,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1835, Unknown=0, NotChecked=0, Total=1980 [2021-12-06 18:28:09,678 INFO L87 Difference]: Start difference. First operand 127 states and 138 transitions. Second operand has 45 states, 45 states have (on average 3.3777777777777778) internal successors, (152), 45 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:28:10,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:28:10,488 INFO L93 Difference]: Finished difference Result 184 states and 195 transitions. [2021-12-06 18:28:10,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-12-06 18:28:10,488 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 3.3777777777777778) internal successors, (152), 45 states have internal predecessors, (152), 0 states have call successors, (0), 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 96 [2021-12-06 18:28:10,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:28:10,489 INFO L225 Difference]: With dead ends: 184 [2021-12-06 18:28:10,489 INFO L226 Difference]: Without dead ends: 182 [2021-12-06 18:28:10,490 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 170 SyntacticMatches, 9 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1127 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=336, Invalid=5066, Unknown=0, NotChecked=0, Total=5402 [2021-12-06 18:28:10,490 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 119 mSDsluCounter, 838 mSDsCounter, 0 mSdLazyCounter, 2006 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 875 SdHoareTripleChecker+Invalid, 2137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 2006 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 18:28:10,490 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 875 Invalid, 2137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 2006 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 18:28:10,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-12-06 18:28:10,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 126. [2021-12-06 18:28:10,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 1.096) internal successors, (137), 125 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:28:10,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 137 transitions. [2021-12-06 18:28:10,506 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 137 transitions. Word has length 96 [2021-12-06 18:28:10,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:28:10,506 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 137 transitions. [2021-12-06 18:28:10,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 3.3777777777777778) internal successors, (152), 45 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:28:10,506 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 137 transitions. [2021-12-06 18:28:10,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-06 18:28:10,506 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:28:10,507 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:28:10,527 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2021-12-06 18:28:10,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:28:10,708 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:28:10,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:28:10,709 INFO L85 PathProgramCache]: Analyzing trace with hash 280183668, now seen corresponding path program 30 times [2021-12-06 18:28:10,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:28:10,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603775731] [2021-12-06 18:28:10,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:28:10,710 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:28:10,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:11,216 INFO L134 CoverageAnalysis]: Checked inductivity of 535 backedges. 0 proven. 535 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:28:11,216 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:28:11,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603775731] [2021-12-06 18:28:11,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603775731] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:28:11,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064075886] [2021-12-06 18:28:11,217 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 18:28:11,217 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:28:11,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:28:11,217 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:28:11,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-12-06 18:28:11,750 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-12-06 18:28:11,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:28:11,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-06 18:28:11,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:28:11,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 18:28:12,761 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-12-06 18:28:12,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 23 [2021-12-06 18:28:12,783 INFO L134 CoverageAnalysis]: Checked inductivity of 535 backedges. 276 proven. 259 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:28:12,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:28:13,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-12-06 18:28:13,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2021-12-06 18:28:13,761 INFO L134 CoverageAnalysis]: Checked inductivity of 535 backedges. 264 proven. 271 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:28:13,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064075886] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:28:13,761 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:28:13,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 32, 32] total 76 [2021-12-06 18:28:13,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751987691] [2021-12-06 18:28:13,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:28:13,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2021-12-06 18:28:13,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:28:13,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-12-06 18:28:13,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=796, Invalid=4904, Unknown=0, NotChecked=0, Total=5700 [2021-12-06 18:28:13,763 INFO L87 Difference]: Start difference. First operand 126 states and 137 transitions. Second operand has 76 states, 76 states have (on average 3.1842105263157894) internal successors, (242), 76 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:28:15,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:28:15,102 INFO L93 Difference]: Finished difference Result 183 states and 194 transitions. [2021-12-06 18:28:15,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-12-06 18:28:15,102 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 3.1842105263157894) internal successors, (242), 76 states have internal predecessors, (242), 0 states have call successors, (0), 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 97 [2021-12-06 18:28:15,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:28:15,103 INFO L225 Difference]: With dead ends: 183 [2021-12-06 18:28:15,103 INFO L226 Difference]: Without dead ends: 127 [2021-12-06 18:28:15,104 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 162 SyntacticMatches, 1 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4174 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2078, Invalid=14178, Unknown=0, NotChecked=0, Total=16256 [2021-12-06 18:28:15,104 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 165 mSDsluCounter, 593 mSDsCounter, 0 mSdLazyCounter, 472 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 629 SdHoareTripleChecker+Invalid, 729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 237 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:28:15,105 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 629 Invalid, 729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 472 Invalid, 0 Unknown, 237 Unchecked, 0.1s Time] [2021-12-06 18:28:15,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-12-06 18:28:15,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 126. [2021-12-06 18:28:15,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 1.088) internal successors, (136), 125 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:28:15,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 136 transitions. [2021-12-06 18:28:15,120 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 136 transitions. Word has length 97 [2021-12-06 18:28:15,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:28:15,121 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 136 transitions. [2021-12-06 18:28:15,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 3.1842105263157894) internal successors, (242), 76 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:28:15,121 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 136 transitions. [2021-12-06 18:28:15,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-12-06 18:28:15,121 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:28:15,121 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:28:15,142 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-12-06 18:28:15,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-12-06 18:28:15,322 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:28:15,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:28:15,324 INFO L85 PathProgramCache]: Analyzing trace with hash 308661088, now seen corresponding path program 31 times [2021-12-06 18:28:15,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:28:15,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362351500] [2021-12-06 18:28:15,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:28:15,325 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:28:15,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:15,854 INFO L134 CoverageAnalysis]: Checked inductivity of 575 backedges. 0 proven. 575 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:28:15,854 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:28:15,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362351500] [2021-12-06 18:28:15,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362351500] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:28:15,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343690697] [2021-12-06 18:28:15,855 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 18:28:15,855 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:28:15,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:28:15,855 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:28:15,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-12-06 18:28:15,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:15,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 64 conjunts are in the unsatisfiable core [2021-12-06 18:28:15,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:28:16,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 18:28:16,176 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 18:28:16,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-06 18:28:16,563 INFO L134 CoverageAnalysis]: Checked inductivity of 575 backedges. 0 proven. 575 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:28:16,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:28:18,961 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_1033| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_1033| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (forall ((v_ArrVal_1334 Int)) (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_1033| 4)) v_ArrVal_1334) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 48)) 0)))) is different from false [2021-12-06 18:28:18,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2021-12-06 18:28:18,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 74 [2021-12-06 18:28:19,032 INFO L134 CoverageAnalysis]: Checked inductivity of 575 backedges. 0 proven. 562 refuted. 0 times theorem prover too weak. 0 trivial. 13 not checked. [2021-12-06 18:28:19,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343690697] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:28:19,032 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:28:19,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 32] total 76 [2021-12-06 18:28:19,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619756058] [2021-12-06 18:28:19,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:28:19,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2021-12-06 18:28:19,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:28:19,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-12-06 18:28:19,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=5228, Unknown=1, NotChecked=146, Total=5700 [2021-12-06 18:28:19,035 INFO L87 Difference]: Start difference. First operand 126 states and 136 transitions. Second operand has 76 states, 76 states have (on average 3.276315789473684) internal successors, (249), 76 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:28:21,580 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* 4 |c_ULTIMATE.start_main_~i~0#1|)))) (and (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (<= .cse0 48) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4))) 0) (forall ((|v_ULTIMATE.start_main_~i~0#1_1033| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_1033| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (forall ((v_ArrVal_1334 Int)) (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_1033| 4)) v_ArrVal_1334) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 48)) 0)))) (< 47 .cse0))) is different from false [2021-12-06 18:28:22,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:28:22,233 INFO L93 Difference]: Finished difference Result 136 states and 146 transitions. [2021-12-06 18:28:22,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-12-06 18:28:22,233 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 3.276315789473684) internal successors, (249), 76 states have internal predecessors, (249), 0 states have call successors, (0), 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 100 [2021-12-06 18:28:22,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:28:22,234 INFO L225 Difference]: With dead ends: 136 [2021-12-06 18:28:22,234 INFO L226 Difference]: Without dead ends: 134 [2021-12-06 18:28:22,235 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 164 SyntacticMatches, 3 SemanticMatches, 105 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 3309 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=610, Invalid=10316, Unknown=2, NotChecked=414, Total=11342 [2021-12-06 18:28:22,235 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 127 mSDsluCounter, 1124 mSDsCounter, 0 mSdLazyCounter, 2812 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 1158 SdHoareTripleChecker+Invalid, 3142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 2812 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 176 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 18:28:22,235 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 1158 Invalid, 3142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 2812 Invalid, 0 Unknown, 176 Unchecked, 0.7s Time] [2021-12-06 18:28:22,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-12-06 18:28:22,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 130. [2021-12-06 18:28:22,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 1.0852713178294573) internal successors, (140), 129 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:28:22,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 140 transitions. [2021-12-06 18:28:22,251 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 140 transitions. Word has length 100 [2021-12-06 18:28:22,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:28:22,252 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 140 transitions. [2021-12-06 18:28:22,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 3.276315789473684) internal successors, (249), 76 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:28:22,252 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 140 transitions. [2021-12-06 18:28:22,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-12-06 18:28:22,252 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:28:22,252 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:28:22,285 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2021-12-06 18:28:22,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:28:22,453 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:28:22,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:28:22,453 INFO L85 PathProgramCache]: Analyzing trace with hash -1833401578, now seen corresponding path program 32 times [2021-12-06 18:28:22,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:28:22,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362528729] [2021-12-06 18:28:22,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:28:22,453 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:28:22,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:22,843 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:28:22,843 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:28:22,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362528729] [2021-12-06 18:28:22,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362528729] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:28:22,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887718099] [2021-12-06 18:28:22,843 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:28:22,844 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:28:22,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:28:22,844 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:28:22,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-12-06 18:28:22,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 18:28:22,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:28:22,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 65 conjunts are in the unsatisfiable core [2021-12-06 18:28:22,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:28:23,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 18:28:23,480 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:28:23,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:28:23,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-12-06 18:28:23,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-12-06 18:28:23,712 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:28:23,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887718099] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:28:23,712 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:28:23,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 47 [2021-12-06 18:28:23,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293431740] [2021-12-06 18:28:23,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:28:23,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-12-06 18:28:23,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:28:23,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-12-06 18:28:23,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=2028, Unknown=0, NotChecked=0, Total=2162 [2021-12-06 18:28:23,713 INFO L87 Difference]: Start difference. First operand 130 states and 140 transitions. Second operand has 47 states, 47 states have (on average 3.4680851063829787) internal successors, (163), 47 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:28:24,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:28:24,758 INFO L93 Difference]: Finished difference Result 140 states and 150 transitions. [2021-12-06 18:28:24,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-12-06 18:28:24,758 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 3.4680851063829787) internal successors, (163), 47 states have internal predecessors, (163), 0 states have call successors, (0), 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 104 [2021-12-06 18:28:24,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:28:24,759 INFO L225 Difference]: With dead ends: 140 [2021-12-06 18:28:24,759 INFO L226 Difference]: Without dead ends: 138 [2021-12-06 18:28:24,759 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 188 SyntacticMatches, 6 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1138 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=326, Invalid=5680, Unknown=0, NotChecked=0, Total=6006 [2021-12-06 18:28:24,760 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 87 mSDsluCounter, 948 mSDsCounter, 0 mSdLazyCounter, 2612 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 985 SdHoareTripleChecker+Invalid, 2715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 2612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 18:28:24,760 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 985 Invalid, 2715 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 2612 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-06 18:28:24,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-12-06 18:28:24,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 134. [2021-12-06 18:28:24,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 1.0827067669172932) internal successors, (144), 133 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:28:24,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 144 transitions. [2021-12-06 18:28:24,777 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 144 transitions. Word has length 104 [2021-12-06 18:28:24,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:28:24,777 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 144 transitions. [2021-12-06 18:28:24,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 3.4680851063829787) internal successors, (163), 47 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:28:24,777 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 144 transitions. [2021-12-06 18:28:24,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-12-06 18:28:24,778 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:28:24,778 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:28:24,802 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2021-12-06 18:28:24,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-12-06 18:28:24,979 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:28:24,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:28:24,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1227067444, now seen corresponding path program 33 times [2021-12-06 18:28:24,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:28:24,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909293490] [2021-12-06 18:28:24,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:28:24,981 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:28:25,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:25,214 INFO L134 CoverageAnalysis]: Checked inductivity of 679 backedges. 339 proven. 340 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:28:25,214 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:28:25,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909293490] [2021-12-06 18:28:25,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909293490] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:28:25,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920226267] [2021-12-06 18:28:25,214 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 18:28:25,214 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:28:25,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:28:25,215 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:28:25,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-12-06 18:28:25,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-12-06 18:28:25,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:28:25,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-06 18:28:25,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:28:26,184 INFO L134 CoverageAnalysis]: Checked inductivity of 679 backedges. 392 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:28:26,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:28:26,279 INFO L134 CoverageAnalysis]: Checked inductivity of 679 backedges. 392 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:28:26,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920226267] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:28:26,280 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:28:26,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 50 [2021-12-06 18:28:26,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187268507] [2021-12-06 18:28:26,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:28:26,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-12-06 18:28:26,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:28:26,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-12-06 18:28:26,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=581, Invalid=1869, Unknown=0, NotChecked=0, Total=2450 [2021-12-06 18:28:26,281 INFO L87 Difference]: Start difference. First operand 134 states and 144 transitions. Second operand has 50 states, 50 states have (on average 3.5) internal successors, (175), 50 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:28:26,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:28:26,502 INFO L93 Difference]: Finished difference Result 206 states and 216 transitions. [2021-12-06 18:28:26,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-06 18:28:26,502 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.5) internal successors, (175), 50 states have internal predecessors, (175), 0 states have call successors, (0), 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 108 [2021-12-06 18:28:26,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:28:26,503 INFO L225 Difference]: With dead ends: 206 [2021-12-06 18:28:26,503 INFO L226 Difference]: Without dead ends: 142 [2021-12-06 18:28:26,504 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1041 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=986, Invalid=3174, Unknown=0, NotChecked=0, Total=4160 [2021-12-06 18:28:26,504 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 241 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:28:26,504 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 298 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 377 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 18:28:26,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-12-06 18:28:26,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 134. [2021-12-06 18:28:26,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 1.0751879699248121) internal successors, (143), 133 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:28:26,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 143 transitions. [2021-12-06 18:28:26,527 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 143 transitions. Word has length 108 [2021-12-06 18:28:26,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:28:26,527 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 143 transitions. [2021-12-06 18:28:26,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.5) internal successors, (175), 50 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:28:26,528 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 143 transitions. [2021-12-06 18:28:26,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-06 18:28:26,528 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:28:26,528 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:28:26,549 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2021-12-06 18:28:26,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-12-06 18:28:26,730 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:28:26,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:28:26,731 INFO L85 PathProgramCache]: Analyzing trace with hash -672924576, now seen corresponding path program 34 times [2021-12-06 18:28:26,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:28:26,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206146773] [2021-12-06 18:28:26,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:28:26,733 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:28:26,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:27,180 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 0 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:28:27,180 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:28:27,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206146773] [2021-12-06 18:28:27,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206146773] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:28:27,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119147672] [2021-12-06 18:28:27,180 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 18:28:27,180 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:28:27,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:28:27,181 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:28:27,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-12-06 18:28:27,262 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 18:28:27,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:28:27,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 69 conjunts are in the unsatisfiable core [2021-12-06 18:28:27,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:28:27,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 18:28:27,774 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 0 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:28:27,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:28:27,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-12-06 18:28:27,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-12-06 18:28:27,967 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 0 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:28:27,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119147672] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:28:27,968 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:28:27,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 50 [2021-12-06 18:28:27,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910288474] [2021-12-06 18:28:27,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:28:27,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-12-06 18:28:27,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:28:27,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-12-06 18:28:27,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=2307, Unknown=0, NotChecked=0, Total=2450 [2021-12-06 18:28:27,969 INFO L87 Difference]: Start difference. First operand 134 states and 143 transitions. Second operand has 50 states, 50 states have (on average 3.48) internal successors, (174), 50 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:28:29,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:28:29,104 INFO L93 Difference]: Finished difference Result 144 states and 153 transitions. [2021-12-06 18:28:29,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-12-06 18:28:29,105 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.48) internal successors, (174), 50 states have internal predecessors, (174), 0 states have call successors, (0), 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 111 [2021-12-06 18:28:29,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:28:29,105 INFO L225 Difference]: With dead ends: 144 [2021-12-06 18:28:29,106 INFO L226 Difference]: Without dead ends: 142 [2021-12-06 18:28:29,106 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 201 SyntacticMatches, 6 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1286 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=347, Invalid=6459, Unknown=0, NotChecked=0, Total=6806 [2021-12-06 18:28:29,106 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 88 mSDsluCounter, 1136 mSDsCounter, 0 mSdLazyCounter, 3108 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 1175 SdHoareTripleChecker+Invalid, 3216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 3108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 18:28:29,107 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 1175 Invalid, 3216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 3108 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-06 18:28:29,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-12-06 18:28:29,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 138. [2021-12-06 18:28:29,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 1.072992700729927) internal successors, (147), 137 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:28:29,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 147 transitions. [2021-12-06 18:28:29,124 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 147 transitions. Word has length 111 [2021-12-06 18:28:29,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:28:29,124 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 147 transitions. [2021-12-06 18:28:29,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.48) internal successors, (174), 50 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:28:29,124 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 147 transitions. [2021-12-06 18:28:29,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-12-06 18:28:29,125 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:28:29,125 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:28:29,144 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2021-12-06 18:28:29,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-12-06 18:28:29,326 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:28:29,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:28:29,327 INFO L85 PathProgramCache]: Analyzing trace with hash 464925718, now seen corresponding path program 35 times [2021-12-06 18:28:29,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:28:29,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793526293] [2021-12-06 18:28:29,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:28:29,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:28:29,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:29,611 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 393 proven. 387 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:28:29,611 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:28:29,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793526293] [2021-12-06 18:28:29,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793526293] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:28:29,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121669517] [2021-12-06 18:28:29,611 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 18:28:29,611 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:28:29,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:28:29,612 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:28:29,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-12-06 18:28:29,913 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-12-06 18:28:29,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:28:29,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-06 18:28:29,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:28:30,355 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 450 proven. 330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:28:30,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:28:30,472 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 450 proven. 330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:28:30,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121669517] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:28:30,473 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:28:30,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 53 [2021-12-06 18:28:30,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068250911] [2021-12-06 18:28:30,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:28:30,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-12-06 18:28:30,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:28:30,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-12-06 18:28:30,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=651, Invalid=2105, Unknown=0, NotChecked=0, Total=2756 [2021-12-06 18:28:30,474 INFO L87 Difference]: Start difference. First operand 138 states and 147 transitions. Second operand has 53 states, 53 states have (on average 3.509433962264151) internal successors, (186), 53 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:28:30,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:28:30,718 INFO L93 Difference]: Finished difference Result 214 states and 223 transitions. [2021-12-06 18:28:30,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-06 18:28:30,719 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 3.509433962264151) internal successors, (186), 53 states have internal predecessors, (186), 0 states have call successors, (0), 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 115 [2021-12-06 18:28:30,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:28:30,719 INFO L225 Difference]: With dead ends: 214 [2021-12-06 18:28:30,719 INFO L226 Difference]: Without dead ends: 146 [2021-12-06 18:28:30,720 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1175 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1107, Invalid=3585, Unknown=0, NotChecked=0, Total=4692 [2021-12-06 18:28:30,720 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 348 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:28:30,720 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [348 Valid, 327 Invalid, 513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 18:28:30,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-12-06 18:28:30,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 138. [2021-12-06 18:28:30,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 1.0656934306569343) internal successors, (146), 137 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:28:30,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 146 transitions. [2021-12-06 18:28:30,738 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 146 transitions. Word has length 115 [2021-12-06 18:28:30,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:28:30,738 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 146 transitions. [2021-12-06 18:28:30,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 3.509433962264151) internal successors, (186), 53 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:28:30,738 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 146 transitions. [2021-12-06 18:28:30,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-12-06 18:28:30,739 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:28:30,739 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:28:30,759 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2021-12-06 18:28:30,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-12-06 18:28:30,940 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:28:30,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:28:30,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1200036098, now seen corresponding path program 36 times [2021-12-06 18:28:30,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:28:30,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795855197] [2021-12-06 18:28:30,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:28:30,942 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:28:30,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:31,445 INFO L134 CoverageAnalysis]: Checked inductivity of 826 backedges. 0 proven. 826 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:28:31,445 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:28:31,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795855197] [2021-12-06 18:28:31,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795855197] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:28:31,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2147044503] [2021-12-06 18:28:31,445 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 18:28:31,445 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:28:31,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:28:31,446 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:28:31,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-12-06 18:28:32,908 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-12-06 18:28:32,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:28:32,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 44 conjunts are in the unsatisfiable core [2021-12-06 18:28:32,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:28:33,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 18:28:34,414 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-12-06 18:28:34,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 23 [2021-12-06 18:28:34,442 INFO L134 CoverageAnalysis]: Checked inductivity of 826 backedges. 435 proven. 391 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:28:34,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:28:35,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-12-06 18:28:35,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2021-12-06 18:28:35,981 INFO L134 CoverageAnalysis]: Checked inductivity of 826 backedges. 420 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:28:35,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2147044503] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:28:35,981 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:28:35,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 38, 38] total 92 [2021-12-06 18:28:35,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358446942] [2021-12-06 18:28:35,981 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:28:35,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2021-12-06 18:28:35,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:28:35,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2021-12-06 18:28:35,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=933, Invalid=7439, Unknown=0, NotChecked=0, Total=8372 [2021-12-06 18:28:35,983 INFO L87 Difference]: Start difference. First operand 138 states and 146 transitions. Second operand has 92 states, 92 states have (on average 3.217391304347826) internal successors, (296), 92 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:28:38,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:28:38,297 INFO L93 Difference]: Finished difference Result 207 states and 215 transitions. [2021-12-06 18:28:38,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-12-06 18:28:38,298 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 3.217391304347826) internal successors, (296), 92 states have internal predecessors, (296), 0 states have call successors, (0), 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 118 [2021-12-06 18:28:38,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:28:38,298 INFO L225 Difference]: With dead ends: 207 [2021-12-06 18:28:38,298 INFO L226 Difference]: Without dead ends: 139 [2021-12-06 18:28:38,299 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 198 SyntacticMatches, 1 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4587 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=2264, Invalid=22228, Unknown=0, NotChecked=0, Total=24492 [2021-12-06 18:28:38,300 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 110 mSDsluCounter, 959 mSDsCounter, 0 mSdLazyCounter, 1109 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 1001 SdHoareTripleChecker+Invalid, 1610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 462 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 18:28:38,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 1001 Invalid, 1610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1109 Invalid, 0 Unknown, 462 Unchecked, 0.3s Time] [2021-12-06 18:28:38,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-12-06 18:28:38,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 138. [2021-12-06 18:28:38,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 1.0583941605839415) internal successors, (145), 137 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:28:38,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 145 transitions. [2021-12-06 18:28:38,322 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 145 transitions. Word has length 118 [2021-12-06 18:28:38,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:28:38,322 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 145 transitions. [2021-12-06 18:28:38,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 3.217391304347826) internal successors, (296), 92 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:28:38,322 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 145 transitions. [2021-12-06 18:28:38,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-12-06 18:28:38,323 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:28:38,323 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:28:38,328 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-12-06 18:28:38,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:28:38,524 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:28:38,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:28:38,525 INFO L85 PathProgramCache]: Analyzing trace with hash 835124374, now seen corresponding path program 37 times [2021-12-06 18:28:38,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:28:38,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391426347] [2021-12-06 18:28:38,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:28:38,527 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:28:38,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:39,039 INFO L134 CoverageAnalysis]: Checked inductivity of 875 backedges. 0 proven. 875 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:28:39,039 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:28:39,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391426347] [2021-12-06 18:28:39,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391426347] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:28:39,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090832267] [2021-12-06 18:28:39,039 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 18:28:39,040 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:28:39,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:28:39,040 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:28:39,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-12-06 18:28:39,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:39,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 76 conjunts are in the unsatisfiable core [2021-12-06 18:28:39,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:28:39,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 18:28:39,283 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-06 18:28:39,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2021-12-06 18:28:39,825 INFO L134 CoverageAnalysis]: Checked inductivity of 875 backedges. 0 proven. 875 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:28:39,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:28:40,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-12-06 18:28:40,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-12-06 18:28:40,101 INFO L134 CoverageAnalysis]: Checked inductivity of 875 backedges. 0 proven. 875 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:28:40,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090832267] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:28:40,101 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:28:40,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 38] total 56 [2021-12-06 18:28:40,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890932610] [2021-12-06 18:28:40,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:28:40,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-12-06 18:28:40,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:28:40,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-12-06 18:28:40,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=2901, Unknown=0, NotChecked=0, Total=3080 [2021-12-06 18:28:40,102 INFO L87 Difference]: Start difference. First operand 138 states and 145 transitions. Second operand has 56 states, 56 states have (on average 3.4107142857142856) internal successors, (191), 56 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:28:41,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:28:41,659 INFO L93 Difference]: Finished difference Result 221 states and 228 transitions. [2021-12-06 18:28:41,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-12-06 18:28:41,659 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 3.4107142857142856) internal successors, (191), 56 states have internal predecessors, (191), 0 states have call successors, (0), 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 121 [2021-12-06 18:28:41,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:28:41,660 INFO L225 Difference]: With dead ends: 221 [2021-12-06 18:28:41,660 INFO L226 Difference]: Without dead ends: 219 [2021-12-06 18:28:41,661 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 217 SyntacticMatches, 7 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2526 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=483, Invalid=10859, Unknown=0, NotChecked=0, Total=11342 [2021-12-06 18:28:41,661 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 176 mSDsluCounter, 1586 mSDsCounter, 0 mSdLazyCounter, 3665 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 1631 SdHoareTripleChecker+Invalid, 3882 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 3665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-06 18:28:41,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 1631 Invalid, 3882 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 3665 Invalid, 0 Unknown, 9 Unchecked, 0.9s Time] [2021-12-06 18:28:41,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-12-06 18:28:41,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 143. [2021-12-06 18:28:41,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 1.056338028169014) internal successors, (150), 142 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:28:41,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 150 transitions. [2021-12-06 18:28:41,685 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 150 transitions. Word has length 121 [2021-12-06 18:28:41,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:28:41,685 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 150 transitions. [2021-12-06 18:28:41,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 3.4107142857142856) internal successors, (191), 56 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:28:41,685 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 150 transitions. [2021-12-06 18:28:41,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-12-06 18:28:41,686 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:28:41,686 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:28:41,705 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2021-12-06 18:28:41,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:28:41,887 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:28:41,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:28:41,888 INFO L85 PathProgramCache]: Analyzing trace with hash 312180866, now seen corresponding path program 38 times [2021-12-06 18:28:41,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:28:41,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907546586] [2021-12-06 18:28:41,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:28:41,889 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:28:41,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:42,401 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 0 proven. 927 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:28:42,401 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:28:42,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907546586] [2021-12-06 18:28:42,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907546586] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:28:42,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651479304] [2021-12-06 18:28:42,402 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:28:42,402 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:28:42,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:28:42,402 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:28:42,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-12-06 18:28:42,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 18:28:42,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:28:42,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 79 conjunts are in the unsatisfiable core [2021-12-06 18:28:42,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:28:42,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 18:28:42,636 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 18:28:42,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-06 18:28:42,669 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 18:28:42,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-06 18:28:43,149 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 2 proven. 925 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:28:43,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:28:43,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-12-06 18:28:43,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-12-06 18:28:43,479 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 0 proven. 926 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:28:43,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651479304] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:28:43,479 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:28:43,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 39] total 57 [2021-12-06 18:28:43,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643028695] [2021-12-06 18:28:43,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:28:43,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-12-06 18:28:43,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:28:43,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-12-06 18:28:43,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=3007, Unknown=0, NotChecked=0, Total=3192 [2021-12-06 18:28:43,480 INFO L87 Difference]: Start difference. First operand 143 states and 150 transitions. Second operand has 57 states, 57 states have (on average 3.43859649122807) internal successors, (196), 57 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:28:44,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:28:44,879 INFO L93 Difference]: Finished difference Result 216 states and 223 transitions. [2021-12-06 18:28:44,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-12-06 18:28:44,879 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 3.43859649122807) internal successors, (196), 57 states have internal predecessors, (196), 0 states have call successors, (0), 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 124 [2021-12-06 18:28:44,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:28:44,880 INFO L225 Difference]: With dead ends: 216 [2021-12-06 18:28:44,880 INFO L226 Difference]: Without dead ends: 214 [2021-12-06 18:28:44,880 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 222 SyntacticMatches, 9 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1773 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=424, Invalid=8318, Unknown=0, NotChecked=0, Total=8742 [2021-12-06 18:28:44,881 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 105 mSDsluCounter, 1578 mSDsCounter, 0 mSdLazyCounter, 3579 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 1623 SdHoareTripleChecker+Invalid, 3710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 3579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-06 18:28:44,881 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 1623 Invalid, 3710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 3579 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-06 18:28:44,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-12-06 18:28:44,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 142. [2021-12-06 18:28:44,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 1.0567375886524824) internal successors, (149), 141 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:28:44,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 149 transitions. [2021-12-06 18:28:44,908 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 149 transitions. Word has length 124 [2021-12-06 18:28:44,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:28:44,908 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 149 transitions. [2021-12-06 18:28:44,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 3.43859649122807) internal successors, (196), 57 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:28:44,908 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 149 transitions. [2021-12-06 18:28:44,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-12-06 18:28:44,909 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:28:44,909 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:28:44,929 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-12-06 18:28:45,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:28:45,110 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:28:45,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:28:45,111 INFO L85 PathProgramCache]: Analyzing trace with hash -820893364, now seen corresponding path program 39 times [2021-12-06 18:28:45,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:28:45,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128991579] [2021-12-06 18:28:45,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:28:45,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:28:45,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:45,684 INFO L134 CoverageAnalysis]: Checked inductivity of 937 backedges. 0 proven. 937 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:28:45,684 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:28:45,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128991579] [2021-12-06 18:28:45,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128991579] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:28:45,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295294956] [2021-12-06 18:28:45,684 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 18:28:45,685 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:28:45,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:28:45,685 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:28:45,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-12-06 18:28:46,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2021-12-06 18:28:46,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:28:46,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 46 conjunts are in the unsatisfiable core [2021-12-06 18:28:46,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:28:47,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 18:28:48,645 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-12-06 18:28:48,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 23 [2021-12-06 18:28:48,673 INFO L134 CoverageAnalysis]: Checked inductivity of 937 backedges. 496 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:28:48,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:28:50,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-12-06 18:28:50,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2021-12-06 18:28:50,686 INFO L134 CoverageAnalysis]: Checked inductivity of 937 backedges. 480 proven. 457 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:28:50,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295294956] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:28:50,686 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:28:50,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 40, 40] total 97 [2021-12-06 18:28:50,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640656839] [2021-12-06 18:28:50,687 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:28:50,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2021-12-06 18:28:50,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:28:50,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2021-12-06 18:28:50,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1031, Invalid=8280, Unknown=1, NotChecked=0, Total=9312 [2021-12-06 18:28:50,688 INFO L87 Difference]: Start difference. First operand 142 states and 149 transitions. Second operand has 97 states, 97 states have (on average 3.2371134020618557) internal successors, (314), 97 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:28:52,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:28:52,616 INFO L93 Difference]: Finished difference Result 215 states and 222 transitions. [2021-12-06 18:28:52,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-12-06 18:28:52,617 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 3.2371134020618557) internal successors, (314), 97 states have internal predecessors, (314), 0 states have call successors, (0), 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 125 [2021-12-06 18:28:52,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:28:52,618 INFO L225 Difference]: With dead ends: 215 [2021-12-06 18:28:52,618 INFO L226 Difference]: Without dead ends: 143 [2021-12-06 18:28:52,619 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 225 SyntacticMatches, 1 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3927 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=2039, Invalid=20012, Unknown=1, NotChecked=0, Total=22052 [2021-12-06 18:28:52,619 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 82 mSDsluCounter, 981 mSDsCounter, 0 mSdLazyCounter, 1186 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 1023 SdHoareTripleChecker+Invalid, 1531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 308 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 18:28:52,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 1023 Invalid, 1531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1186 Invalid, 0 Unknown, 308 Unchecked, 0.3s Time] [2021-12-06 18:28:52,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-12-06 18:28:52,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 142. [2021-12-06 18:28:52,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 1.049645390070922) internal successors, (148), 141 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:28:52,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 148 transitions. [2021-12-06 18:28:52,644 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 148 transitions. Word has length 125 [2021-12-06 18:28:52,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:28:52,644 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 148 transitions. [2021-12-06 18:28:52,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 3.2371134020618557) internal successors, (314), 97 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:28:52,644 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 148 transitions. [2021-12-06 18:28:52,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-12-06 18:28:52,644 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:28:52,645 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 17, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:28:52,665 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-12-06 18:28:52,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:28:52,846 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:28:52,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:28:52,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1760220984, now seen corresponding path program 40 times [2021-12-06 18:28:52,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:28:52,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858759732] [2021-12-06 18:28:52,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:28:52,848 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:28:52,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:53,362 INFO L134 CoverageAnalysis]: Checked inductivity of 989 backedges. 0 proven. 989 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:28:53,362 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:28:53,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858759732] [2021-12-06 18:28:53,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858759732] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:28:53,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691394978] [2021-12-06 18:28:53,362 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 18:28:53,363 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:28:53,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:28:53,363 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:28:53,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-12-06 18:28:53,453 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 18:28:53,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:28:53,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 80 conjunts are in the unsatisfiable core [2021-12-06 18:28:53,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:28:53,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 18:28:53,620 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-06 18:28:53,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2021-12-06 18:28:54,169 INFO L134 CoverageAnalysis]: Checked inductivity of 989 backedges. 0 proven. 989 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:28:54,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:28:54,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-12-06 18:28:54,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-12-06 18:28:54,489 INFO L134 CoverageAnalysis]: Checked inductivity of 989 backedges. 0 proven. 989 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:28:54,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691394978] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:28:54,489 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:28:54,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39, 40] total 59 [2021-12-06 18:28:54,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520240742] [2021-12-06 18:28:54,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:28:54,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-12-06 18:28:54,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:28:54,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-12-06 18:28:54,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=3233, Unknown=0, NotChecked=0, Total=3422 [2021-12-06 18:28:54,490 INFO L87 Difference]: Start difference. First operand 142 states and 148 transitions. Second operand has 59 states, 59 states have (on average 3.4237288135593222) internal successors, (202), 59 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:28:56,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:28:56,200 INFO L93 Difference]: Finished difference Result 229 states and 235 transitions. [2021-12-06 18:28:56,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-12-06 18:28:56,200 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 3.4237288135593222) internal successors, (202), 59 states have internal predecessors, (202), 0 states have call successors, (0), 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 128 [2021-12-06 18:28:56,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:28:56,201 INFO L225 Difference]: With dead ends: 229 [2021-12-06 18:28:56,201 INFO L226 Difference]: Without dead ends: 227 [2021-12-06 18:28:56,202 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 230 SyntacticMatches, 7 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2818 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=510, Invalid=12146, Unknown=0, NotChecked=0, Total=12656 [2021-12-06 18:28:56,202 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 162 mSDsluCounter, 1647 mSDsCounter, 0 mSdLazyCounter, 3792 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 1694 SdHoareTripleChecker+Invalid, 3991 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 3792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-06 18:28:56,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 1694 Invalid, 3991 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 3792 Invalid, 0 Unknown, 5 Unchecked, 0.9s Time] [2021-12-06 18:28:56,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-12-06 18:28:56,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 147. [2021-12-06 18:28:56,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 1.047945205479452) internal successors, (153), 146 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:28:56,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 153 transitions. [2021-12-06 18:28:56,226 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 153 transitions. Word has length 128 [2021-12-06 18:28:56,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:28:56,226 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 153 transitions. [2021-12-06 18:28:56,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 3.4237288135593222) internal successors, (202), 59 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:28:56,226 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 153 transitions. [2021-12-06 18:28:56,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-12-06 18:28:56,227 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:28:56,227 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 17, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:28:56,258 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2021-12-06 18:28:56,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-12-06 18:28:56,428 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:28:56,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:28:56,429 INFO L85 PathProgramCache]: Analyzing trace with hash -1356705332, now seen corresponding path program 41 times [2021-12-06 18:28:56,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:28:56,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359642893] [2021-12-06 18:28:56,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:28:56,430 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:28:56,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:28:57,003 INFO L134 CoverageAnalysis]: Checked inductivity of 1044 backedges. 0 proven. 1044 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:28:57,003 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:28:57,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359642893] [2021-12-06 18:28:57,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359642893] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:28:57,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199522613] [2021-12-06 18:28:57,004 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 18:28:57,004 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:28:57,004 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:28:57,004 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:28:57,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-12-06 18:28:57,487 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2021-12-06 18:28:57,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:28:57,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 83 conjunts are in the unsatisfiable core [2021-12-06 18:28:57,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:28:57,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 18:28:57,617 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 18:28:57,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-06 18:28:57,650 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 18:28:57,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-06 18:28:58,176 INFO L134 CoverageAnalysis]: Checked inductivity of 1044 backedges. 2 proven. 1042 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:28:58,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:28:58,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-12-06 18:28:58,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-12-06 18:28:58,527 INFO L134 CoverageAnalysis]: Checked inductivity of 1044 backedges. 0 proven. 1043 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:28:58,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199522613] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:28:58,528 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:28:58,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 41] total 60 [2021-12-06 18:28:58,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427235509] [2021-12-06 18:28:58,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:28:58,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-12-06 18:28:58,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:28:58,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-12-06 18:28:58,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=3345, Unknown=0, NotChecked=0, Total=3540 [2021-12-06 18:28:58,529 INFO L87 Difference]: Start difference. First operand 147 states and 153 transitions. Second operand has 60 states, 60 states have (on average 3.45) internal successors, (207), 60 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:29:00,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:29:00,062 INFO L93 Difference]: Finished difference Result 224 states and 230 transitions. [2021-12-06 18:29:00,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-12-06 18:29:00,062 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 3.45) internal successors, (207), 60 states have internal predecessors, (207), 0 states have call successors, (0), 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 131 [2021-12-06 18:29:00,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:29:00,063 INFO L225 Difference]: With dead ends: 224 [2021-12-06 18:29:00,063 INFO L226 Difference]: Without dead ends: 222 [2021-12-06 18:29:00,064 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 235 SyntacticMatches, 9 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1957 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=446, Invalid=9256, Unknown=0, NotChecked=0, Total=9702 [2021-12-06 18:29:00,064 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 112 mSDsluCounter, 1645 mSDsCounter, 0 mSdLazyCounter, 4032 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 1692 SdHoareTripleChecker+Invalid, 4173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 4032 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:29:00,064 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 1692 Invalid, 4173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 4032 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-06 18:29:00,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-12-06 18:29:00,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 146. [2021-12-06 18:29:00,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 1.0482758620689656) internal successors, (152), 145 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:29:00,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 152 transitions. [2021-12-06 18:29:00,089 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 152 transitions. Word has length 131 [2021-12-06 18:29:00,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:29:00,089 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 152 transitions. [2021-12-06 18:29:00,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 3.45) internal successors, (207), 60 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:29:00,089 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 152 transitions. [2021-12-06 18:29:00,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-12-06 18:29:00,090 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:29:00,090 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:29:00,110 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-12-06 18:29:00,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:29:00,291 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:29:00,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:29:00,292 INFO L85 PathProgramCache]: Analyzing trace with hash -979115282, now seen corresponding path program 42 times [2021-12-06 18:29:00,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:29:00,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581879402] [2021-12-06 18:29:00,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:29:00,293 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:29:00,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:29:00,834 INFO L134 CoverageAnalysis]: Checked inductivity of 1055 backedges. 0 proven. 1055 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:29:00,834 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:29:00,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581879402] [2021-12-06 18:29:00,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581879402] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:29:00,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797606390] [2021-12-06 18:29:00,834 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 18:29:00,835 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:29:00,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:29:00,835 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:29:00,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-12-06 18:29:05,116 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-12-06 18:29:05,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:29:05,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 48 conjunts are in the unsatisfiable core [2021-12-06 18:29:05,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:29:05,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 18:29:06,956 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-12-06 18:29:06,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 23 [2021-12-06 18:29:06,986 INFO L134 CoverageAnalysis]: Checked inductivity of 1055 backedges. 561 proven. 494 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:29:06,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:29:08,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-12-06 18:29:08,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2021-12-06 18:29:08,784 INFO L134 CoverageAnalysis]: Checked inductivity of 1055 backedges. 544 proven. 511 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:29:08,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797606390] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:29:08,784 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:29:08,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 42, 42] total 102 [2021-12-06 18:29:08,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370847464] [2021-12-06 18:29:08,784 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:29:08,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2021-12-06 18:29:08,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:29:08,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2021-12-06 18:29:08,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1134, Invalid=9168, Unknown=0, NotChecked=0, Total=10302 [2021-12-06 18:29:08,785 INFO L87 Difference]: Start difference. First operand 146 states and 152 transitions. Second operand has 102 states, 102 states have (on average 3.2549019607843137) internal successors, (332), 102 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:29:11,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:29:11,572 INFO L93 Difference]: Finished difference Result 223 states and 229 transitions. [2021-12-06 18:29:11,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-12-06 18:29:11,573 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 3.2549019607843137) internal successors, (332), 102 states have internal predecessors, (332), 0 states have call successors, (0), 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 132 [2021-12-06 18:29:11,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:29:11,573 INFO L225 Difference]: With dead ends: 223 [2021-12-06 18:29:11,574 INFO L226 Difference]: Without dead ends: 147 [2021-12-06 18:29:11,575 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 222 SyntacticMatches, 1 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5601 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=2696, Invalid=27406, Unknown=0, NotChecked=0, Total=30102 [2021-12-06 18:29:11,575 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 94 mSDsluCounter, 1169 mSDsCounter, 0 mSdLazyCounter, 1330 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 1215 SdHoareTripleChecker+Invalid, 1882 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 508 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 18:29:11,575 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 1215 Invalid, 1882 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1330 Invalid, 0 Unknown, 508 Unchecked, 0.3s Time] [2021-12-06 18:29:11,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-12-06 18:29:11,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 146. [2021-12-06 18:29:11,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 1.0413793103448277) internal successors, (151), 145 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:29:11,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 151 transitions. [2021-12-06 18:29:11,600 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 151 transitions. Word has length 132 [2021-12-06 18:29:11,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:29:11,600 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 151 transitions. [2021-12-06 18:29:11,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 3.2549019607843137) internal successors, (332), 102 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:29:11,600 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 151 transitions. [2021-12-06 18:29:11,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-06 18:29:11,601 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:29:11,601 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 18, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:29:11,606 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2021-12-06 18:29:11,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-12-06 18:29:11,802 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:29:11,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:29:11,803 INFO L85 PathProgramCache]: Analyzing trace with hash -676072574, now seen corresponding path program 43 times [2021-12-06 18:29:11,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:29:11,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693873603] [2021-12-06 18:29:11,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:29:11,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:29:11,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:29:12,402 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:29:12,402 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:29:12,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693873603] [2021-12-06 18:29:12,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693873603] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:29:12,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081263760] [2021-12-06 18:29:12,403 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 18:29:12,403 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:29:12,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:29:12,403 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:29:12,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-12-06 18:29:12,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:29:12,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 84 conjunts are in the unsatisfiable core [2021-12-06 18:29:12,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:29:12,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 18:29:12,683 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-06 18:29:12,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2021-12-06 18:29:13,361 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:29:13,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:29:13,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-12-06 18:29:13,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-12-06 18:29:13,650 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:29:13,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081263760] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:29:13,650 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:29:13,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41, 42] total 62 [2021-12-06 18:29:13,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679754252] [2021-12-06 18:29:13,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:29:13,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2021-12-06 18:29:13,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:29:13,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-12-06 18:29:13,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=3583, Unknown=0, NotChecked=0, Total=3782 [2021-12-06 18:29:13,652 INFO L87 Difference]: Start difference. First operand 146 states and 151 transitions. Second operand has 62 states, 62 states have (on average 3.435483870967742) internal successors, (213), 62 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:29:15,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:29:15,537 INFO L93 Difference]: Finished difference Result 237 states and 242 transitions. [2021-12-06 18:29:15,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-12-06 18:29:15,537 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 3.435483870967742) internal successors, (213), 62 states have internal predecessors, (213), 0 states have call successors, (0), 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 135 [2021-12-06 18:29:15,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:29:15,538 INFO L225 Difference]: With dead ends: 237 [2021-12-06 18:29:15,538 INFO L226 Difference]: Without dead ends: 235 [2021-12-06 18:29:15,539 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 243 SyntacticMatches, 7 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 3126 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=537, Invalid=13505, Unknown=0, NotChecked=0, Total=14042 [2021-12-06 18:29:15,539 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 200 mSDsluCounter, 1870 mSDsCounter, 0 mSdLazyCounter, 4052 mSolverCounterSat, 239 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 1919 SdHoareTripleChecker+Invalid, 4336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 239 IncrementalHoareTripleChecker+Valid, 4052 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:29:15,539 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 1919 Invalid, 4336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [239 Valid, 4052 Invalid, 0 Unknown, 45 Unchecked, 1.0s Time] [2021-12-06 18:29:15,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-12-06 18:29:15,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 151. [2021-12-06 18:29:15,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.04) internal successors, (156), 150 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:29:15,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 156 transitions. [2021-12-06 18:29:15,567 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 156 transitions. Word has length 135 [2021-12-06 18:29:15,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:29:15,567 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 156 transitions. [2021-12-06 18:29:15,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 3.435483870967742) internal successors, (213), 62 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:29:15,567 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 156 transitions. [2021-12-06 18:29:15,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-12-06 18:29:15,568 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:29:15,568 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 18, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:29:15,587 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2021-12-06 18:29:15,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-12-06 18:29:15,769 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:29:15,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:29:15,770 INFO L85 PathProgramCache]: Analyzing trace with hash -752014738, now seen corresponding path program 44 times [2021-12-06 18:29:15,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:29:15,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215760795] [2021-12-06 18:29:15,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:29:15,771 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:29:15,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:29:16,419 INFO L134 CoverageAnalysis]: Checked inductivity of 1168 backedges. 0 proven. 1168 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:29:16,419 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:29:16,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215760795] [2021-12-06 18:29:16,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215760795] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:29:16,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969421059] [2021-12-06 18:29:16,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:29:16,419 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:29:16,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:29:16,420 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:29:16,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-12-06 18:29:16,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 18:29:16,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:29:16,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 87 conjunts are in the unsatisfiable core [2021-12-06 18:29:16,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:29:16,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 18:29:16,690 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 18:29:16,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-06 18:29:16,723 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 18:29:16,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-06 18:29:17,320 INFO L134 CoverageAnalysis]: Checked inductivity of 1168 backedges. 2 proven. 1166 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:29:17,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:29:17,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-12-06 18:29:17,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-12-06 18:29:17,700 INFO L134 CoverageAnalysis]: Checked inductivity of 1168 backedges. 0 proven. 1167 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:29:17,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969421059] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:29:17,700 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:29:17,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42, 43] total 63 [2021-12-06 18:29:17,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012616778] [2021-12-06 18:29:17,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:29:17,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-12-06 18:29:17,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:29:17,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-12-06 18:29:17,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=3701, Unknown=0, NotChecked=0, Total=3906 [2021-12-06 18:29:17,701 INFO L87 Difference]: Start difference. First operand 151 states and 156 transitions. Second operand has 63 states, 63 states have (on average 3.4603174603174605) internal successors, (218), 63 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:29:19,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:29:19,612 INFO L93 Difference]: Finished difference Result 232 states and 237 transitions. [2021-12-06 18:29:19,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-12-06 18:29:19,612 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 3.4603174603174605) internal successors, (218), 63 states have internal predecessors, (218), 0 states have call successors, (0), 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 138 [2021-12-06 18:29:19,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:29:19,613 INFO L225 Difference]: With dead ends: 232 [2021-12-06 18:29:19,613 INFO L226 Difference]: Without dead ends: 230 [2021-12-06 18:29:19,613 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 248 SyntacticMatches, 9 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2150 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=468, Invalid=10244, Unknown=0, NotChecked=0, Total=10712 [2021-12-06 18:29:19,614 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 151 mSDsluCounter, 2050 mSDsCounter, 0 mSdLazyCounter, 4827 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 2099 SdHoareTripleChecker+Invalid, 5004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 4827 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-06 18:29:19,614 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 2099 Invalid, 5004 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 4827 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-06 18:29:19,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-12-06 18:29:19,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 150. [2021-12-06 18:29:19,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 1.0402684563758389) internal successors, (155), 149 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:29:19,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 155 transitions. [2021-12-06 18:29:19,645 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 155 transitions. Word has length 138 [2021-12-06 18:29:19,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:29:19,646 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 155 transitions. [2021-12-06 18:29:19,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 3.4603174603174605) internal successors, (218), 63 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:29:19,646 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 155 transitions. [2021-12-06 18:29:19,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-12-06 18:29:19,646 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:29:19,646 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:29:19,667 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2021-12-06 18:29:19,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-12-06 18:29:19,848 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:29:19,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:29:19,849 INFO L85 PathProgramCache]: Analyzing trace with hash 915524152, now seen corresponding path program 45 times [2021-12-06 18:29:19,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:29:19,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014352556] [2021-12-06 18:29:19,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:29:19,850 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:29:19,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:29:20,381 INFO L134 CoverageAnalysis]: Checked inductivity of 1180 backedges. 0 proven. 1180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:29:20,381 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:29:20,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014352556] [2021-12-06 18:29:20,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014352556] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:29:20,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241655092] [2021-12-06 18:29:20,382 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 18:29:20,382 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:29:20,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:29:20,382 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:29:20,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-12-06 18:29:25,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2021-12-06 18:29:25,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:29:25,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 50 conjunts are in the unsatisfiable core [2021-12-06 18:29:25,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:29:25,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 18:29:27,194 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-12-06 18:29:27,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 23 [2021-12-06 18:29:27,226 INFO L134 CoverageAnalysis]: Checked inductivity of 1180 backedges. 630 proven. 550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:29:27,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:29:29,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-12-06 18:29:29,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2021-12-06 18:29:29,280 INFO L134 CoverageAnalysis]: Checked inductivity of 1180 backedges. 612 proven. 568 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:29:29,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241655092] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:29:29,281 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:29:29,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 44, 44] total 107 [2021-12-06 18:29:29,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293725523] [2021-12-06 18:29:29,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:29:29,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2021-12-06 18:29:29,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:29:29,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2021-12-06 18:29:29,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1242, Invalid=10100, Unknown=0, NotChecked=0, Total=11342 [2021-12-06 18:29:29,282 INFO L87 Difference]: Start difference. First operand 150 states and 155 transitions. Second operand has 107 states, 107 states have (on average 3.2710280373831777) internal successors, (350), 107 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:29:31,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:29:31,660 INFO L93 Difference]: Finished difference Result 231 states and 236 transitions. [2021-12-06 18:29:31,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-12-06 18:29:31,660 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 3.2710280373831777) internal successors, (350), 107 states have internal predecessors, (350), 0 states have call successors, (0), 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 139 [2021-12-06 18:29:31,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:29:31,661 INFO L225 Difference]: With dead ends: 231 [2021-12-06 18:29:31,661 INFO L226 Difference]: Without dead ends: 151 [2021-12-06 18:29:31,662 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 414 GetRequests, 250 SyntacticMatches, 1 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4782 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=2444, Invalid=24616, Unknown=0, NotChecked=0, Total=27060 [2021-12-06 18:29:31,662 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 116 mSDsluCounter, 1126 mSDsCounter, 0 mSdLazyCounter, 1280 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 1171 SdHoareTripleChecker+Invalid, 1599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 266 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 18:29:31,662 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 1171 Invalid, 1599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1280 Invalid, 0 Unknown, 266 Unchecked, 0.3s Time] [2021-12-06 18:29:31,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-12-06 18:29:31,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 150. [2021-12-06 18:29:31,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 1.0335570469798658) internal successors, (154), 149 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:29:31,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 154 transitions. [2021-12-06 18:29:31,691 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 154 transitions. Word has length 139 [2021-12-06 18:29:31,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:29:31,691 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 154 transitions. [2021-12-06 18:29:31,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 3.2710280373831777) internal successors, (350), 107 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:29:31,692 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 154 transitions. [2021-12-06 18:29:31,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-12-06 18:29:31,692 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:29:31,692 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 19, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:29:31,699 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2021-12-06 18:29:31,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-12-06 18:29:31,893 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:29:31,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:29:31,894 INFO L85 PathProgramCache]: Analyzing trace with hash -746738908, now seen corresponding path program 46 times [2021-12-06 18:29:31,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:29:31,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499538292] [2021-12-06 18:29:31,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:29:31,895 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:29:31,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:29:32,513 INFO L134 CoverageAnalysis]: Checked inductivity of 1238 backedges. 0 proven. 1238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:29:32,513 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:29:32,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499538292] [2021-12-06 18:29:32,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499538292] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:29:32,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691199837] [2021-12-06 18:29:32,513 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 18:29:32,513 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:29:32,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:29:32,514 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:29:32,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-12-06 18:29:32,620 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 18:29:32,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:29:32,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 88 conjunts are in the unsatisfiable core [2021-12-06 18:29:32,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:29:32,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 18:29:32,790 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-06 18:29:32,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2021-12-06 18:29:33,472 INFO L134 CoverageAnalysis]: Checked inductivity of 1238 backedges. 0 proven. 1238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:29:33,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:29:33,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-12-06 18:29:33,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-12-06 18:29:33,786 INFO L134 CoverageAnalysis]: Checked inductivity of 1238 backedges. 0 proven. 1238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:29:33,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691199837] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:29:33,786 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:29:33,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43, 44] total 65 [2021-12-06 18:29:33,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295823038] [2021-12-06 18:29:33,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:29:33,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2021-12-06 18:29:33,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:29:33,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-12-06 18:29:33,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=3951, Unknown=0, NotChecked=0, Total=4160 [2021-12-06 18:29:33,787 INFO L87 Difference]: Start difference. First operand 150 states and 154 transitions. Second operand has 65 states, 65 states have (on average 3.4461538461538463) internal successors, (224), 65 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:29:35,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:29:35,989 INFO L93 Difference]: Finished difference Result 245 states and 249 transitions. [2021-12-06 18:29:35,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-12-06 18:29:35,990 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 3.4461538461538463) internal successors, (224), 65 states have internal predecessors, (224), 0 states have call successors, (0), 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 142 [2021-12-06 18:29:35,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:29:35,991 INFO L225 Difference]: With dead ends: 245 [2021-12-06 18:29:35,991 INFO L226 Difference]: Without dead ends: 243 [2021-12-06 18:29:35,991 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 256 SyntacticMatches, 7 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 3450 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=564, Invalid=14936, Unknown=0, NotChecked=0, Total=15500 [2021-12-06 18:29:35,992 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 168 mSDsluCounter, 2160 mSDsCounter, 0 mSdLazyCounter, 4859 mSolverCounterSat, 215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 2211 SdHoareTripleChecker+Invalid, 5180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 4859 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 106 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-06 18:29:35,992 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 2211 Invalid, 5180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [215 Valid, 4859 Invalid, 0 Unknown, 106 Unchecked, 1.2s Time] [2021-12-06 18:29:35,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-12-06 18:29:36,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 155. [2021-12-06 18:29:36,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.0324675324675325) internal successors, (159), 154 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:29:36,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 159 transitions. [2021-12-06 18:29:36,024 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 159 transitions. Word has length 142 [2021-12-06 18:29:36,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:29:36,024 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 159 transitions. [2021-12-06 18:29:36,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 3.4461538461538463) internal successors, (224), 65 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:29:36,024 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 159 transitions. [2021-12-06 18:29:36,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-12-06 18:29:36,025 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:29:36,025 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 21, 19, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:29:36,045 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-12-06 18:29:36,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-12-06 18:29:36,226 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:29:36,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:29:36,227 INFO L85 PathProgramCache]: Analyzing trace with hash -252636488, now seen corresponding path program 47 times [2021-12-06 18:29:36,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:29:36,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954695582] [2021-12-06 18:29:36,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:29:36,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:29:36,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:29:36,903 INFO L134 CoverageAnalysis]: Checked inductivity of 1299 backedges. 0 proven. 1299 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:29:36,904 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:29:36,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954695582] [2021-12-06 18:29:36,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954695582] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:29:36,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480336478] [2021-12-06 18:29:36,904 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 18:29:36,904 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:29:36,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:29:36,905 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:29:36,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-12-06 18:29:37,407 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2021-12-06 18:29:37,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:29:37,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 91 conjunts are in the unsatisfiable core [2021-12-06 18:29:37,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:29:37,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 18:29:37,554 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 18:29:37,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-06 18:29:37,590 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 18:29:37,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-06 18:29:38,249 INFO L134 CoverageAnalysis]: Checked inductivity of 1299 backedges. 2 proven. 1297 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:29:38,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:29:38,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-12-06 18:29:38,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-12-06 18:29:38,643 INFO L134 CoverageAnalysis]: Checked inductivity of 1299 backedges. 0 proven. 1298 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:29:38,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480336478] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:29:38,643 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:29:38,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 45] total 66 [2021-12-06 18:29:38,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258457769] [2021-12-06 18:29:38,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:29:38,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-12-06 18:29:38,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:29:38,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-12-06 18:29:38,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=4075, Unknown=0, NotChecked=0, Total=4290 [2021-12-06 18:29:38,645 INFO L87 Difference]: Start difference. First operand 155 states and 159 transitions. Second operand has 66 states, 66 states have (on average 3.4696969696969697) internal successors, (229), 66 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:29:40,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:29:40,656 INFO L93 Difference]: Finished difference Result 240 states and 244 transitions. [2021-12-06 18:29:40,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-12-06 18:29:40,656 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 3.4696969696969697) internal successors, (229), 66 states have internal predecessors, (229), 0 states have call successors, (0), 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 145 [2021-12-06 18:29:40,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:29:40,657 INFO L225 Difference]: With dead ends: 240 [2021-12-06 18:29:40,657 INFO L226 Difference]: Without dead ends: 238 [2021-12-06 18:29:40,657 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 261 SyntacticMatches, 9 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2352 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=490, Invalid=11282, Unknown=0, NotChecked=0, Total=11772 [2021-12-06 18:29:40,658 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 154 mSDsluCounter, 2160 mSDsCounter, 0 mSdLazyCounter, 5263 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 2211 SdHoareTripleChecker+Invalid, 5450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 5263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-06 18:29:40,658 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 2211 Invalid, 5450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 5263 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-06 18:29:40,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-12-06 18:29:40,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 154. [2021-12-06 18:29:40,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 1.0326797385620916) internal successors, (158), 153 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:29:40,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 158 transitions. [2021-12-06 18:29:40,691 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 158 transitions. Word has length 145 [2021-12-06 18:29:40,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:29:40,691 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 158 transitions. [2021-12-06 18:29:40,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 3.4696969696969697) internal successors, (229), 66 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:29:40,692 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 158 transitions. [2021-12-06 18:29:40,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-12-06 18:29:40,692 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:29:40,692 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:29:40,724 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2021-12-06 18:29:40,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:29:40,893 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:29:40,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:29:40,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1100144858, now seen corresponding path program 48 times [2021-12-06 18:29:40,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:29:40,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915582086] [2021-12-06 18:29:40,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:29:40,895 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:29:40,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:29:41,550 INFO L134 CoverageAnalysis]: Checked inductivity of 1312 backedges. 0 proven. 1312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:29:41,550 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:29:41,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915582086] [2021-12-06 18:29:41,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915582086] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:29:41,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499077216] [2021-12-06 18:29:41,550 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 18:29:41,550 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:29:41,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:29:41,551 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:29:41,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-12-06 18:29:44,786 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2021-12-06 18:29:44,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:29:44,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 52 conjunts are in the unsatisfiable core [2021-12-06 18:29:44,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:29:45,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 18:29:46,973 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-12-06 18:29:46,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 23 [2021-12-06 18:29:47,006 INFO L134 CoverageAnalysis]: Checked inductivity of 1312 backedges. 703 proven. 609 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:29:47,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:29:49,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-12-06 18:29:49,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2021-12-06 18:29:49,131 INFO L134 CoverageAnalysis]: Checked inductivity of 1312 backedges. 684 proven. 628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:29:49,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499077216] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:29:49,131 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:29:49,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 46, 46] total 112 [2021-12-06 18:29:49,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992858572] [2021-12-06 18:29:49,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:29:49,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2021-12-06 18:29:49,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:29:49,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2021-12-06 18:29:49,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1355, Invalid=11077, Unknown=0, NotChecked=0, Total=12432 [2021-12-06 18:29:49,133 INFO L87 Difference]: Start difference. First operand 154 states and 158 transitions. Second operand has 112 states, 112 states have (on average 3.2857142857142856) internal successors, (368), 112 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:29:51,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:29:51,737 INFO L93 Difference]: Finished difference Result 239 states and 243 transitions. [2021-12-06 18:29:51,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-12-06 18:29:51,737 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 112 states have (on average 3.2857142857142856) internal successors, (368), 112 states have internal predecessors, (368), 0 states have call successors, (0), 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 146 [2021-12-06 18:29:51,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:29:51,738 INFO L225 Difference]: With dead ends: 239 [2021-12-06 18:29:51,738 INFO L226 Difference]: Without dead ends: 155 [2021-12-06 18:29:51,739 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 435 GetRequests, 263 SyntacticMatches, 1 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5241 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=2660, Invalid=27096, Unknown=0, NotChecked=0, Total=29756 [2021-12-06 18:29:51,739 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 139 mSDsluCounter, 1062 mSDsCounter, 0 mSdLazyCounter, 1441 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 1109 SdHoareTripleChecker+Invalid, 1706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 222 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 18:29:51,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 1109 Invalid, 1706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1441 Invalid, 0 Unknown, 222 Unchecked, 0.4s Time] [2021-12-06 18:29:51,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-12-06 18:29:51,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 154. [2021-12-06 18:29:51,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 1.026143790849673) internal successors, (157), 153 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:29:51,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 157 transitions. [2021-12-06 18:29:51,776 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 157 transitions. Word has length 146 [2021-12-06 18:29:51,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:29:51,776 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 157 transitions. [2021-12-06 18:29:51,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 112 states, 112 states have (on average 3.2857142857142856) internal successors, (368), 112 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:29:51,776 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 157 transitions. [2021-12-06 18:29:51,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-12-06 18:29:51,777 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:29:51,777 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 21, 20, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:29:51,784 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2021-12-06 18:29:51,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:29:51,978 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:29:51,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:29:51,979 INFO L85 PathProgramCache]: Analyzing trace with hash 555769454, now seen corresponding path program 49 times [2021-12-06 18:29:51,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:29:51,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278960025] [2021-12-06 18:29:51,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:29:51,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:29:52,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:29:52,653 INFO L134 CoverageAnalysis]: Checked inductivity of 1373 backedges. 0 proven. 1373 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:29:52,654 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:29:52,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278960025] [2021-12-06 18:29:52,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278960025] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:29:52,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701269204] [2021-12-06 18:29:52,654 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 18:29:52,654 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:29:52,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:29:52,655 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:29:52,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-12-06 18:29:52,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:29:52,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 92 conjunts are in the unsatisfiable core [2021-12-06 18:29:52,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:29:52,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 18:29:52,962 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-06 18:29:52,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2021-12-06 18:29:53,722 INFO L134 CoverageAnalysis]: Checked inductivity of 1373 backedges. 0 proven. 1373 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:29:53,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:29:53,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-12-06 18:29:53,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-12-06 18:29:54,048 INFO L134 CoverageAnalysis]: Checked inductivity of 1373 backedges. 0 proven. 1373 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:29:54,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701269204] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:29:54,048 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:29:54,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45, 46] total 68 [2021-12-06 18:29:54,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878894129] [2021-12-06 18:29:54,048 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:29:54,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2021-12-06 18:29:54,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:29:54,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-12-06 18:29:54,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=4337, Unknown=0, NotChecked=0, Total=4556 [2021-12-06 18:29:54,050 INFO L87 Difference]: Start difference. First operand 154 states and 157 transitions. Second operand has 68 states, 68 states have (on average 3.4558823529411766) internal successors, (235), 68 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:29:56,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:29:56,395 INFO L93 Difference]: Finished difference Result 258 states and 261 transitions. [2021-12-06 18:29:56,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2021-12-06 18:29:56,396 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 3.4558823529411766) internal successors, (235), 68 states have internal predecessors, (235), 0 states have call successors, (0), 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 149 [2021-12-06 18:29:56,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:29:56,397 INFO L225 Difference]: With dead ends: 258 [2021-12-06 18:29:56,397 INFO L226 Difference]: Without dead ends: 256 [2021-12-06 18:29:56,398 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 406 GetRequests, 270 SyntacticMatches, 7 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3791 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=624, Invalid=16406, Unknown=0, NotChecked=0, Total=17030 [2021-12-06 18:29:56,398 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 183 mSDsluCounter, 2395 mSDsCounter, 0 mSdLazyCounter, 5538 mSolverCounterSat, 228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 2446 SdHoareTripleChecker+Invalid, 5915 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 5538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 149 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-06 18:29:56,398 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 2446 Invalid, 5915 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 5538 Invalid, 0 Unknown, 149 Unchecked, 1.3s Time] [2021-12-06 18:29:56,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-12-06 18:29:56,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 159. [2021-12-06 18:29:56,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 1.0253164556962024) internal successors, (162), 158 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:29:56,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 162 transitions. [2021-12-06 18:29:56,435 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 162 transitions. Word has length 149 [2021-12-06 18:29:56,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:29:56,435 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 162 transitions. [2021-12-06 18:29:56,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 3.4558823529411766) internal successors, (235), 68 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:29:56,435 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 162 transitions. [2021-12-06 18:29:56,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-12-06 18:29:56,435 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:29:56,436 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 20, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:29:56,457 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2021-12-06 18:29:56,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-12-06 18:29:56,636 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:29:56,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:29:56,637 INFO L85 PathProgramCache]: Analyzing trace with hash 864618586, now seen corresponding path program 50 times [2021-12-06 18:29:56,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:29:56,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150225918] [2021-12-06 18:29:56,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:29:56,637 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:29:56,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:29:57,393 INFO L134 CoverageAnalysis]: Checked inductivity of 1437 backedges. 0 proven. 1437 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:29:57,393 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:29:57,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150225918] [2021-12-06 18:29:57,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150225918] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:29:57,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66068055] [2021-12-06 18:29:57,393 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:29:57,393 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:29:57,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:29:57,394 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:29:57,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-12-06 18:29:57,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 18:29:57,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:29:57,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 95 conjunts are in the unsatisfiable core [2021-12-06 18:29:57,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:29:57,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 18:29:57,679 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 18:29:57,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-06 18:29:57,718 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 18:29:57,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-06 18:29:58,423 INFO L134 CoverageAnalysis]: Checked inductivity of 1437 backedges. 2 proven. 1435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:29:58,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:29:58,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-12-06 18:29:58,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-12-06 18:29:58,814 INFO L134 CoverageAnalysis]: Checked inductivity of 1437 backedges. 0 proven. 1436 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:29:58,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66068055] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:29:58,815 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:29:58,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46, 47] total 69 [2021-12-06 18:29:58,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408151048] [2021-12-06 18:29:58,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:29:58,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2021-12-06 18:29:58,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:29:58,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-12-06 18:29:58,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=4467, Unknown=0, NotChecked=0, Total=4692 [2021-12-06 18:29:58,816 INFO L87 Difference]: Start difference. First operand 159 states and 162 transitions. Second operand has 69 states, 69 states have (on average 3.4782608695652173) internal successors, (240), 69 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:30:00,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:30:00,866 INFO L93 Difference]: Finished difference Result 248 states and 251 transitions. [2021-12-06 18:30:00,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-12-06 18:30:00,866 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 3.4782608695652173) internal successors, (240), 69 states have internal predecessors, (240), 0 states have call successors, (0), 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 152 [2021-12-06 18:30:00,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:30:00,867 INFO L225 Difference]: With dead ends: 248 [2021-12-06 18:30:00,867 INFO L226 Difference]: Without dead ends: 246 [2021-12-06 18:30:00,868 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 274 SyntacticMatches, 9 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2563 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=512, Invalid=12370, Unknown=0, NotChecked=0, Total=12882 [2021-12-06 18:30:00,868 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 162 mSDsluCounter, 2203 mSDsCounter, 0 mSdLazyCounter, 5355 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 2256 SdHoareTripleChecker+Invalid, 5548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 5355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-06 18:30:00,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 2256 Invalid, 5548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 5355 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-06 18:30:00,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-12-06 18:30:00,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 158. [2021-12-06 18:30:00,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 1.0254777070063694) internal successors, (161), 157 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:30:00,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 161 transitions. [2021-12-06 18:30:00,906 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 161 transitions. Word has length 152 [2021-12-06 18:30:00,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:30:00,906 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 161 transitions. [2021-12-06 18:30:00,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 3.4782608695652173) internal successors, (240), 69 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:30:00,907 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 161 transitions. [2021-12-06 18:30:00,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-12-06 18:30:00,907 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:30:00,907 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:30:00,927 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2021-12-06 18:30:01,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-12-06 18:30:01,108 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:30:01,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:30:01,110 INFO L85 PathProgramCache]: Analyzing trace with hash -860430556, now seen corresponding path program 51 times [2021-12-06 18:30:01,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:30:01,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187326119] [2021-12-06 18:30:01,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:30:01,111 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:30:01,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:30:01,779 INFO L134 CoverageAnalysis]: Checked inductivity of 1451 backedges. 0 proven. 1451 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:30:01,779 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:30:01,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187326119] [2021-12-06 18:30:01,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187326119] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:30:01,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917951951] [2021-12-06 18:30:01,779 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 18:30:01,779 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:30:01,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:30:01,780 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:30:01,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-12-06 18:30:04,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2021-12-06 18:30:04,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:30:04,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 54 conjunts are in the unsatisfiable core [2021-12-06 18:30:04,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:30:05,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 18:30:07,053 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-12-06 18:30:07,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 23 [2021-12-06 18:30:07,086 INFO L134 CoverageAnalysis]: Checked inductivity of 1451 backedges. 780 proven. 671 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:30:07,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:30:09,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-12-06 18:30:09,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2021-12-06 18:30:09,374 INFO L134 CoverageAnalysis]: Checked inductivity of 1451 backedges. 760 proven. 691 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:30:09,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917951951] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:30:09,374 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:30:09,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 48, 48] total 117 [2021-12-06 18:30:09,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271441349] [2021-12-06 18:30:09,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:30:09,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2021-12-06 18:30:09,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:30:09,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2021-12-06 18:30:09,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1473, Invalid=12099, Unknown=0, NotChecked=0, Total=13572 [2021-12-06 18:30:09,376 INFO L87 Difference]: Start difference. First operand 158 states and 161 transitions. Second operand has 117 states, 117 states have (on average 3.299145299145299) internal successors, (386), 117 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:30:12,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:30:12,380 INFO L93 Difference]: Finished difference Result 247 states and 250 transitions. [2021-12-06 18:30:12,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-12-06 18:30:12,380 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 3.299145299145299) internal successors, (386), 117 states have internal predecessors, (386), 0 states have call successors, (0), 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 153 [2021-12-06 18:30:12,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:30:12,381 INFO L225 Difference]: With dead ends: 247 [2021-12-06 18:30:12,381 INFO L226 Difference]: Without dead ends: 159 [2021-12-06 18:30:12,382 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 456 GetRequests, 276 SyntacticMatches, 1 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5721 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=2885, Invalid=29695, Unknown=0, NotChecked=0, Total=32580 [2021-12-06 18:30:12,383 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 99 mSDsluCounter, 1432 mSDsCounter, 0 mSdLazyCounter, 1663 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 1481 SdHoareTripleChecker+Invalid, 1901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 212 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 18:30:12,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 1481 Invalid, 1901 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1663 Invalid, 0 Unknown, 212 Unchecked, 0.4s Time] [2021-12-06 18:30:12,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-12-06 18:30:12,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 158. [2021-12-06 18:30:12,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 1.019108280254777) internal successors, (160), 157 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:30:12,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 160 transitions. [2021-12-06 18:30:12,424 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 160 transitions. Word has length 153 [2021-12-06 18:30:12,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:30:12,425 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 160 transitions. [2021-12-06 18:30:12,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 117 states have (on average 3.299145299145299) internal successors, (386), 117 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:30:12,425 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 160 transitions. [2021-12-06 18:30:12,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-12-06 18:30:12,425 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:30:12,426 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 21, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:30:12,447 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2021-12-06 18:30:12,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-12-06 18:30:12,627 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:30:12,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:30:12,628 INFO L85 PathProgramCache]: Analyzing trace with hash -979324144, now seen corresponding path program 52 times [2021-12-06 18:30:12,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:30:12,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392307122] [2021-12-06 18:30:12,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:30:12,629 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:30:12,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:30:13,364 INFO L134 CoverageAnalysis]: Checked inductivity of 1515 backedges. 0 proven. 1515 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:30:13,364 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:30:13,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392307122] [2021-12-06 18:30:13,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392307122] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:30:13,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722145170] [2021-12-06 18:30:13,365 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 18:30:13,365 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:30:13,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:30:13,365 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:30:13,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-12-06 18:30:13,486 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 18:30:13,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:30:13,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 96 conjunts are in the unsatisfiable core [2021-12-06 18:30:13,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:30:13,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 18:30:13,692 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-06 18:30:13,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2021-12-06 18:30:14,512 INFO L134 CoverageAnalysis]: Checked inductivity of 1515 backedges. 0 proven. 1515 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:30:14,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:30:14,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-12-06 18:30:14,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-12-06 18:30:14,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1515 backedges. 0 proven. 1515 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:30:14,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722145170] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:30:14,867 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:30:14,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 47, 48] total 71 [2021-12-06 18:30:14,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095844593] [2021-12-06 18:30:14,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:30:14,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2021-12-06 18:30:14,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:30:14,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-12-06 18:30:14,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=4741, Unknown=0, NotChecked=0, Total=4970 [2021-12-06 18:30:14,869 INFO L87 Difference]: Start difference. First operand 158 states and 160 transitions. Second operand has 71 states, 71 states have (on average 3.464788732394366) internal successors, (246), 71 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:30:17,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:30:17,420 INFO L93 Difference]: Finished difference Result 263 states and 266 transitions. [2021-12-06 18:30:17,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2021-12-06 18:30:17,420 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 3.464788732394366) internal successors, (246), 71 states have internal predecessors, (246), 0 states have call successors, (0), 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 156 [2021-12-06 18:30:17,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:30:17,421 INFO L225 Difference]: With dead ends: 263 [2021-12-06 18:30:17,421 INFO L226 Difference]: Without dead ends: 261 [2021-12-06 18:30:17,422 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 424 GetRequests, 282 SyntacticMatches, 7 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 4146 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=618, Invalid=18014, Unknown=0, NotChecked=0, Total=18632 [2021-12-06 18:30:17,422 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 190 mSDsluCounter, 2525 mSDsCounter, 0 mSdLazyCounter, 5644 mSolverCounterSat, 239 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 2580 SdHoareTripleChecker+Invalid, 5928 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 239 IncrementalHoareTripleChecker+Valid, 5644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-06 18:30:17,422 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 2580 Invalid, 5928 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [239 Valid, 5644 Invalid, 0 Unknown, 45 Unchecked, 1.4s Time] [2021-12-06 18:30:17,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-12-06 18:30:17,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 165. [2021-12-06 18:30:17,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.024390243902439) internal successors, (168), 164 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:30:17,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 168 transitions. [2021-12-06 18:30:17,465 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 168 transitions. Word has length 156 [2021-12-06 18:30:17,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:30:17,465 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 168 transitions. [2021-12-06 18:30:17,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 3.464788732394366) internal successors, (246), 71 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:30:17,465 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 168 transitions. [2021-12-06 18:30:17,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-12-06 18:30:17,466 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:30:17,466 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 22, 21, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:30:17,486 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2021-12-06 18:30:17,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-12-06 18:30:17,667 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:30:17,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:30:17,668 INFO L85 PathProgramCache]: Analyzing trace with hash 996091170, now seen corresponding path program 3 times [2021-12-06 18:30:17,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:30:17,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000629492] [2021-12-06 18:30:17,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:30:17,669 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:30:17,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:30:17,868 INFO L134 CoverageAnalysis]: Checked inductivity of 1582 backedges. 45 proven. 737 refuted. 0 times theorem prover too weak. 800 trivial. 0 not checked. [2021-12-06 18:30:17,868 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:30:17,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000629492] [2021-12-06 18:30:17,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000629492] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:30:17,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625391579] [2021-12-06 18:30:17,868 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 18:30:17,869 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:30:17,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:30:17,869 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:30:17,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-12-06 18:30:19,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2021-12-06 18:30:19,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:30:19,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-06 18:30:19,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:30:19,877 INFO L134 CoverageAnalysis]: Checked inductivity of 1582 backedges. 45 proven. 737 refuted. 0 times theorem prover too weak. 800 trivial. 0 not checked. [2021-12-06 18:30:19,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:30:20,587 INFO L134 CoverageAnalysis]: Checked inductivity of 1582 backedges. 45 proven. 737 refuted. 0 times theorem prover too weak. 800 trivial. 0 not checked. [2021-12-06 18:30:20,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625391579] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:30:20,587 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:30:20,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2021-12-06 18:30:20,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109430234] [2021-12-06 18:30:20,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:30:20,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-12-06 18:30:20,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:30:20,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-12-06 18:30:20,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-12-06 18:30:20,588 INFO L87 Difference]: Start difference. First operand 165 states and 168 transitions. Second operand has 49 states, 49 states have (on average 3.163265306122449) internal successors, (155), 49 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:30:21,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:30:21,108 INFO L93 Difference]: Finished difference Result 583 states and 635 transitions. [2021-12-06 18:30:21,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-12-06 18:30:21,108 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.163265306122449) internal successors, (155), 49 states have internal predecessors, (155), 0 states have call successors, (0), 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 159 [2021-12-06 18:30:21,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:30:21,110 INFO L225 Difference]: With dead ends: 583 [2021-12-06 18:30:21,110 INFO L226 Difference]: Without dead ends: 495 [2021-12-06 18:30:21,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 294 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-12-06 18:30:21,110 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 709 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 377 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 709 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 377 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 18:30:21,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [709 Valid, 181 Invalid, 652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [377 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 18:30:21,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-12-06 18:30:21,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 235. [2021-12-06 18:30:21,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 1.1153846153846154) internal successors, (261), 234 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:30:21,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 261 transitions. [2021-12-06 18:30:21,157 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 261 transitions. Word has length 159 [2021-12-06 18:30:21,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:30:21,157 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 261 transitions. [2021-12-06 18:30:21,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.163265306122449) internal successors, (155), 49 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:30:21,158 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 261 transitions. [2021-12-06 18:30:21,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-12-06 18:30:21,158 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:30:21,158 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 23, 21, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:30:21,180 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2021-12-06 18:30:21,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-12-06 18:30:21,359 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:30:21,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:30:21,360 INFO L85 PathProgramCache]: Analyzing trace with hash 409814948, now seen corresponding path program 53 times [2021-12-06 18:30:21,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:30:21,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374076073] [2021-12-06 18:30:21,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:30:21,361 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:30:21,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:30:22,134 INFO L134 CoverageAnalysis]: Checked inductivity of 1582 backedges. 0 proven. 1582 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:30:22,134 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:30:22,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374076073] [2021-12-06 18:30:22,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374076073] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:30:22,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400399311] [2021-12-06 18:30:22,134 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 18:30:22,134 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:30:22,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:30:22,135 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:30:22,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-12-06 18:30:23,034 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2021-12-06 18:30:23,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:30:23,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 99 conjunts are in the unsatisfiable core [2021-12-06 18:30:23,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:30:23,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 18:30:23,206 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 18:30:23,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-06 18:30:23,244 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 18:30:23,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-06 18:30:24,038 INFO L134 CoverageAnalysis]: Checked inductivity of 1582 backedges. 2 proven. 1580 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:30:24,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:30:24,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-12-06 18:30:24,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-12-06 18:30:24,458 INFO L134 CoverageAnalysis]: Checked inductivity of 1582 backedges. 0 proven. 1581 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:30:24,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400399311] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:30:24,458 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:30:24,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48, 49] total 72 [2021-12-06 18:30:24,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001489022] [2021-12-06 18:30:24,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:30:24,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2021-12-06 18:30:24,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:30:24,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-12-06 18:30:24,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=4877, Unknown=0, NotChecked=0, Total=5112 [2021-12-06 18:30:24,459 INFO L87 Difference]: Start difference. First operand 235 states and 261 transitions. Second operand has 72 states, 72 states have (on average 3.486111111111111) internal successors, (251), 72 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:30:26,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:30:26,627 INFO L93 Difference]: Finished difference Result 328 states and 354 transitions. [2021-12-06 18:30:26,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-12-06 18:30:26,627 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 3.486111111111111) internal successors, (251), 72 states have internal predecessors, (251), 0 states have call successors, (0), 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 159 [2021-12-06 18:30:26,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:30:26,628 INFO L225 Difference]: With dead ends: 328 [2021-12-06 18:30:26,628 INFO L226 Difference]: Without dead ends: 326 [2021-12-06 18:30:26,632 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 413 GetRequests, 287 SyntacticMatches, 9 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2783 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=534, Invalid=13508, Unknown=0, NotChecked=0, Total=14042 [2021-12-06 18:30:26,633 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 178 mSDsluCounter, 2536 mSDsCounter, 0 mSdLazyCounter, 5757 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 2591 SdHoareTripleChecker+Invalid, 5967 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 5757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-06 18:30:26,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 2591 Invalid, 5967 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 5757 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-06 18:30:26,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-12-06 18:30:26,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 234. [2021-12-06 18:30:26,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 1.1158798283261802) internal successors, (260), 233 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:30:26,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 260 transitions. [2021-12-06 18:30:26,681 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 260 transitions. Word has length 159 [2021-12-06 18:30:26,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:30:26,681 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 260 transitions. [2021-12-06 18:30:26,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 3.486111111111111) internal successors, (251), 72 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:30:26,681 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 260 transitions. [2021-12-06 18:30:26,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-12-06 18:30:26,682 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:30:26,682 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:30:26,703 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2021-12-06 18:30:26,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:30:26,883 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:30:26,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:30:26,884 INFO L85 PathProgramCache]: Analyzing trace with hash -640150842, now seen corresponding path program 54 times [2021-12-06 18:30:26,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:30:26,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129031196] [2021-12-06 18:30:26,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:30:26,885 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:30:26,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:30:27,629 INFO L134 CoverageAnalysis]: Checked inductivity of 1597 backedges. 0 proven. 1597 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:30:27,629 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:30:27,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129031196] [2021-12-06 18:30:27,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129031196] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:30:27,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595829450] [2021-12-06 18:30:27,629 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 18:30:27,629 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:30:27,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:30:27,630 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:30:27,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-12-06 18:30:31,676 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2021-12-06 18:30:31,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:30:31,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 56 conjunts are in the unsatisfiable core [2021-12-06 18:30:31,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:30:32,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 18:30:34,214 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-12-06 18:30:34,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 23 [2021-12-06 18:30:34,249 INFO L134 CoverageAnalysis]: Checked inductivity of 1597 backedges. 861 proven. 736 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:30:34,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:30:36,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-12-06 18:30:36,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2021-12-06 18:30:36,615 INFO L134 CoverageAnalysis]: Checked inductivity of 1597 backedges. 840 proven. 757 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:30:36,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595829450] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:30:36,615 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:30:36,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 50, 50] total 122 [2021-12-06 18:30:36,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929637243] [2021-12-06 18:30:36,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:30:36,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2021-12-06 18:30:36,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:30:36,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2021-12-06 18:30:36,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=13166, Unknown=0, NotChecked=0, Total=14762 [2021-12-06 18:30:36,617 INFO L87 Difference]: Start difference. First operand 234 states and 260 transitions. Second operand has 122 states, 122 states have (on average 3.3114754098360657) internal successors, (404), 122 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:30:39,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:30:39,823 INFO L93 Difference]: Finished difference Result 327 states and 353 transitions. [2021-12-06 18:30:39,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-12-06 18:30:39,824 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 122 states have (on average 3.3114754098360657) internal successors, (404), 122 states have internal predecessors, (404), 0 states have call successors, (0), 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 160 [2021-12-06 18:30:39,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:30:39,824 INFO L225 Difference]: With dead ends: 327 [2021-12-06 18:30:39,825 INFO L226 Difference]: Without dead ends: 235 [2021-12-06 18:30:39,826 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 289 SyntacticMatches, 1 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6222 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=3119, Invalid=32413, Unknown=0, NotChecked=0, Total=35532 [2021-12-06 18:30:39,826 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 81 mSDsluCounter, 1856 mSDsCounter, 0 mSdLazyCounter, 1776 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 1907 SdHoareTripleChecker+Invalid, 2016 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1776 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 214 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 18:30:39,826 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 1907 Invalid, 2016 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1776 Invalid, 0 Unknown, 214 Unchecked, 0.4s Time] [2021-12-06 18:30:39,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-12-06 18:30:39,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 234. [2021-12-06 18:30:39,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 1.111587982832618) internal successors, (259), 233 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:30:39,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 259 transitions. [2021-12-06 18:30:39,879 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 259 transitions. Word has length 160 [2021-12-06 18:30:39,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:30:39,879 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 259 transitions. [2021-12-06 18:30:39,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 122 states have (on average 3.3114754098360657) internal successors, (404), 122 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:30:39,879 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 259 transitions. [2021-12-06 18:30:39,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-12-06 18:30:39,880 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:30:39,880 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 23, 22, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:30:39,902 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2021-12-06 18:30:40,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-12-06 18:30:40,081 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:30:40,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:30:40,082 INFO L85 PathProgramCache]: Analyzing trace with hash 341851482, now seen corresponding path program 55 times [2021-12-06 18:30:40,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:30:40,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526641746] [2021-12-06 18:30:40,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:30:40,083 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:30:40,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:30:40,855 INFO L134 CoverageAnalysis]: Checked inductivity of 1664 backedges. 0 proven. 1664 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:30:40,855 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:30:40,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526641746] [2021-12-06 18:30:40,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526641746] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:30:40,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018561020] [2021-12-06 18:30:40,855 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 18:30:40,855 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:30:40,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:30:40,856 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:30:40,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-12-06 18:30:40,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:30:40,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 100 conjunts are in the unsatisfiable core [2021-12-06 18:30:40,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:30:41,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 18:30:41,203 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-06 18:30:41,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2021-12-06 18:30:42,067 INFO L134 CoverageAnalysis]: Checked inductivity of 1664 backedges. 0 proven. 1664 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:30:42,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:30:42,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-12-06 18:30:42,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-12-06 18:30:42,455 INFO L134 CoverageAnalysis]: Checked inductivity of 1664 backedges. 0 proven. 1664 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:30:42,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018561020] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:30:42,455 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:30:42,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49, 50] total 74 [2021-12-06 18:30:42,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511254315] [2021-12-06 18:30:42,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:30:42,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2021-12-06 18:30:42,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:30:42,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-12-06 18:30:42,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=5163, Unknown=0, NotChecked=0, Total=5402 [2021-12-06 18:30:42,456 INFO L87 Difference]: Start difference. First operand 234 states and 259 transitions. Second operand has 74 states, 74 states have (on average 3.472972972972973) internal successors, (257), 74 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:30:45,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:30:45,292 INFO L93 Difference]: Finished difference Result 341 states and 366 transitions. [2021-12-06 18:30:45,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2021-12-06 18:30:45,293 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 3.472972972972973) internal successors, (257), 74 states have internal predecessors, (257), 0 states have call successors, (0), 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 163 [2021-12-06 18:30:45,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:30:45,294 INFO L225 Difference]: With dead ends: 341 [2021-12-06 18:30:45,294 INFO L226 Difference]: Without dead ends: 339 [2021-12-06 18:30:45,295 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 443 GetRequests, 295 SyntacticMatches, 7 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 4518 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=645, Invalid=19661, Unknown=0, NotChecked=0, Total=20306 [2021-12-06 18:30:45,295 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 240 mSDsluCounter, 2728 mSDsCounter, 0 mSdLazyCounter, 6447 mSolverCounterSat, 286 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 2785 SdHoareTripleChecker+Invalid, 6738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 286 IncrementalHoareTripleChecker+Valid, 6447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-06 18:30:45,295 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [240 Valid, 2785 Invalid, 6738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [286 Valid, 6447 Invalid, 0 Unknown, 5 Unchecked, 1.6s Time] [2021-12-06 18:30:45,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-12-06 18:30:45,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 239. [2021-12-06 18:30:45,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 1.1092436974789917) internal successors, (264), 238 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:30:45,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 264 transitions. [2021-12-06 18:30:45,350 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 264 transitions. Word has length 163 [2021-12-06 18:30:45,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:30:45,351 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 264 transitions. [2021-12-06 18:30:45,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 3.472972972972973) internal successors, (257), 74 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:30:45,351 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 264 transitions. [2021-12-06 18:30:45,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-12-06 18:30:45,351 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:30:45,352 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 24, 22, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:30:45,372 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2021-12-06 18:30:45,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:30:45,552 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:30:45,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:30:45,553 INFO L85 PathProgramCache]: Analyzing trace with hash -2144134586, now seen corresponding path program 56 times [2021-12-06 18:30:45,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:30:45,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792110589] [2021-12-06 18:30:45,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:30:45,554 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:30:45,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:30:46,353 INFO L134 CoverageAnalysis]: Checked inductivity of 1734 backedges. 0 proven. 1734 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:30:46,354 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:30:46,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792110589] [2021-12-06 18:30:46,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792110589] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:30:46,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636051739] [2021-12-06 18:30:46,354 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:30:46,354 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:30:46,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:30:46,355 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:30:46,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-12-06 18:30:46,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 18:30:46,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:30:46,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 103 conjunts are in the unsatisfiable core [2021-12-06 18:30:46,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:30:46,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 18:30:46,683 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 18:30:46,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-06 18:30:46,722 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 18:30:46,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-06 18:30:47,602 INFO L134 CoverageAnalysis]: Checked inductivity of 1734 backedges. 2 proven. 1732 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:30:47,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:30:47,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-12-06 18:30:47,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-12-06 18:30:48,058 INFO L134 CoverageAnalysis]: Checked inductivity of 1734 backedges. 0 proven. 1733 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:30:48,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636051739] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:30:48,058 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:30:48,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50, 51] total 75 [2021-12-06 18:30:48,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059575903] [2021-12-06 18:30:48,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:30:48,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2021-12-06 18:30:48,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:30:48,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-12-06 18:30:48,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=5305, Unknown=0, NotChecked=0, Total=5550 [2021-12-06 18:30:48,059 INFO L87 Difference]: Start difference. First operand 239 states and 264 transitions. Second operand has 75 states, 75 states have (on average 3.493333333333333) internal successors, (262), 75 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:30:50,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:30:50,714 INFO L93 Difference]: Finished difference Result 336 states and 361 transitions. [2021-12-06 18:30:50,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-12-06 18:30:50,714 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 3.493333333333333) internal successors, (262), 75 states have internal predecessors, (262), 0 states have call successors, (0), 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 166 [2021-12-06 18:30:50,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:30:50,716 INFO L225 Difference]: With dead ends: 336 [2021-12-06 18:30:50,716 INFO L226 Difference]: Without dead ends: 334 [2021-12-06 18:30:50,716 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 431 GetRequests, 300 SyntacticMatches, 9 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3012 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=556, Invalid=14696, Unknown=0, NotChecked=0, Total=15252 [2021-12-06 18:30:50,717 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 137 mSDsluCounter, 2807 mSDsCounter, 0 mSdLazyCounter, 6976 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 2864 SdHoareTripleChecker+Invalid, 7147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 6976 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-06 18:30:50,717 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 2864 Invalid, 7147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 6976 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-06 18:30:50,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2021-12-06 18:30:50,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 238. [2021-12-06 18:30:50,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 1.109704641350211) internal successors, (263), 237 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:30:50,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 263 transitions. [2021-12-06 18:30:50,775 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 263 transitions. Word has length 166 [2021-12-06 18:30:50,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:30:50,775 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 263 transitions. [2021-12-06 18:30:50,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 3.493333333333333) internal successors, (262), 75 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:30:50,776 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 263 transitions. [2021-12-06 18:30:50,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-12-06 18:30:50,778 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:30:50,779 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:30:50,800 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2021-12-06 18:30:50,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:30:50,979 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:30:50,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:30:50,981 INFO L85 PathProgramCache]: Analyzing trace with hash 1305831440, now seen corresponding path program 57 times [2021-12-06 18:30:50,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:30:50,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348517405] [2021-12-06 18:30:50,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:30:50,982 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:30:51,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:30:51,800 INFO L134 CoverageAnalysis]: Checked inductivity of 1750 backedges. 0 proven. 1750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:30:51,800 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:30:51,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348517405] [2021-12-06 18:30:51,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348517405] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:30:51,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926865318] [2021-12-06 18:30:51,800 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 18:30:51,800 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:30:51,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:30:51,801 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:30:51,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-12-06 18:30:55,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2021-12-06 18:30:55,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:30:55,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 488 conjuncts, 58 conjunts are in the unsatisfiable core [2021-12-06 18:30:55,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:30:55,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 18:30:58,048 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-12-06 18:30:58,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 23 [2021-12-06 18:30:58,091 INFO L134 CoverageAnalysis]: Checked inductivity of 1750 backedges. 946 proven. 804 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:30:58,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:31:00,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-12-06 18:31:00,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2021-12-06 18:31:01,059 INFO L134 CoverageAnalysis]: Checked inductivity of 1750 backedges. 924 proven. 826 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:31:01,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926865318] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:31:01,059 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:31:01,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 52, 52] total 127 [2021-12-06 18:31:01,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273015410] [2021-12-06 18:31:01,060 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:31:01,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 127 states [2021-12-06 18:31:01,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:31:01,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2021-12-06 18:31:01,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1724, Invalid=14276, Unknown=2, NotChecked=0, Total=16002 [2021-12-06 18:31:01,061 INFO L87 Difference]: Start difference. First operand 238 states and 263 transitions. Second operand has 127 states, 127 states have (on average 3.322834645669291) internal successors, (422), 127 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:31:05,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:31:05,639 INFO L93 Difference]: Finished difference Result 335 states and 360 transitions. [2021-12-06 18:31:05,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2021-12-06 18:31:05,639 INFO L78 Accepts]: Start accepts. Automaton has has 127 states, 127 states have (on average 3.322834645669291) internal successors, (422), 127 states have internal predecessors, (422), 0 states have call successors, (0), 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 167 [2021-12-06 18:31:05,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:31:05,640 INFO L225 Difference]: With dead ends: 335 [2021-12-06 18:31:05,640 INFO L226 Difference]: Without dead ends: 239 [2021-12-06 18:31:05,642 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 501 GetRequests, 282 SyntacticMatches, 1 SemanticMatches, 218 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8906 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=4119, Invalid=44059, Unknown=2, NotChecked=0, Total=48180 [2021-12-06 18:31:05,643 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 151 mSDsluCounter, 1687 mSDsCounter, 0 mSdLazyCounter, 2012 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 1743 SdHoareTripleChecker+Invalid, 3250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 2012 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1182 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 18:31:05,643 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 1743 Invalid, 3250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 2012 Invalid, 0 Unknown, 1182 Unchecked, 0.5s Time] [2021-12-06 18:31:05,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-12-06 18:31:05,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 238. [2021-12-06 18:31:05,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 1.1054852320675106) internal successors, (262), 237 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:31:05,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 262 transitions. [2021-12-06 18:31:05,707 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 262 transitions. Word has length 167 [2021-12-06 18:31:05,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:31:05,707 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 262 transitions. [2021-12-06 18:31:05,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 127 states, 127 states have (on average 3.322834645669291) internal successors, (422), 127 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:31:05,708 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 262 transitions. [2021-12-06 18:31:05,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-12-06 18:31:05,709 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:31:05,709 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 24, 23, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:31:05,731 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2021-12-06 18:31:05,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-12-06 18:31:05,910 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:31:05,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:31:05,911 INFO L85 PathProgramCache]: Analyzing trace with hash -1445466372, now seen corresponding path program 58 times [2021-12-06 18:31:05,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:31:05,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555695016] [2021-12-06 18:31:05,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:31:05,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:31:05,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:31:06,734 INFO L134 CoverageAnalysis]: Checked inductivity of 1820 backedges. 0 proven. 1820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:31:06,734 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:31:06,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555695016] [2021-12-06 18:31:06,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555695016] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:31:06,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469915563] [2021-12-06 18:31:06,734 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 18:31:06,734 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:31:06,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:31:06,735 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:31:06,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-12-06 18:31:06,871 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 18:31:06,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:31:06,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 104 conjunts are in the unsatisfiable core [2021-12-06 18:31:06,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:31:07,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 18:31:07,071 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-06 18:31:07,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2021-12-06 18:31:08,001 INFO L134 CoverageAnalysis]: Checked inductivity of 1820 backedges. 0 proven. 1820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:31:08,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:31:08,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-12-06 18:31:08,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-12-06 18:31:08,370 INFO L134 CoverageAnalysis]: Checked inductivity of 1820 backedges. 0 proven. 1820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:31:08,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469915563] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:31:08,370 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:31:08,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 51, 52] total 77 [2021-12-06 18:31:08,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523077320] [2021-12-06 18:31:08,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:31:08,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2021-12-06 18:31:08,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:31:08,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-12-06 18:31:08,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=5603, Unknown=0, NotChecked=0, Total=5852 [2021-12-06 18:31:08,372 INFO L87 Difference]: Start difference. First operand 238 states and 262 transitions. Second operand has 77 states, 77 states have (on average 3.4805194805194803) internal successors, (268), 77 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:31:11,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:31:11,461 INFO L93 Difference]: Finished difference Result 349 states and 373 transitions. [2021-12-06 18:31:11,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2021-12-06 18:31:11,462 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 3.4805194805194803) internal successors, (268), 77 states have internal predecessors, (268), 0 states have call successors, (0), 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 170 [2021-12-06 18:31:11,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:31:11,463 INFO L225 Difference]: With dead ends: 349 [2021-12-06 18:31:11,463 INFO L226 Difference]: Without dead ends: 347 [2021-12-06 18:31:11,464 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 308 SyntacticMatches, 7 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 4906 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=672, Invalid=21380, Unknown=0, NotChecked=0, Total=22052 [2021-12-06 18:31:11,464 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 208 mSDsluCounter, 2794 mSDsCounter, 0 mSdLazyCounter, 6388 mSolverCounterSat, 259 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 2853 SdHoareTripleChecker+Invalid, 6652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 259 IncrementalHoareTripleChecker+Valid, 6388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-06 18:31:11,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 2853 Invalid, 6652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [259 Valid, 6388 Invalid, 0 Unknown, 5 Unchecked, 1.7s Time] [2021-12-06 18:31:11,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2021-12-06 18:31:11,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 243. [2021-12-06 18:31:11,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 1.103305785123967) internal successors, (267), 242 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:31:11,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 267 transitions. [2021-12-06 18:31:11,530 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 267 transitions. Word has length 170 [2021-12-06 18:31:11,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:31:11,530 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 267 transitions. [2021-12-06 18:31:11,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 3.4805194805194803) internal successors, (268), 77 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:31:11,530 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 267 transitions. [2021-12-06 18:31:11,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-12-06 18:31:11,531 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:31:11,531 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 25, 23, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:31:11,551 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2021-12-06 18:31:11,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:31:11,732 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:31:11,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:31:11,734 INFO L85 PathProgramCache]: Analyzing trace with hash -202706800, now seen corresponding path program 59 times [2021-12-06 18:31:11,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:31:11,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564656029] [2021-12-06 18:31:11,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:31:11,735 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:31:11,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:31:12,585 INFO L134 CoverageAnalysis]: Checked inductivity of 1893 backedges. 0 proven. 1893 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:31:12,585 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:31:12,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564656029] [2021-12-06 18:31:12,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564656029] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:31:12,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227337489] [2021-12-06 18:31:12,585 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 18:31:12,585 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:31:12,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:31:12,586 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:31:12,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-12-06 18:31:16,093 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2021-12-06 18:31:16,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:31:16,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 504 conjuncts, 107 conjunts are in the unsatisfiable core [2021-12-06 18:31:16,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:31:16,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 18:31:16,279 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 18:31:16,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-06 18:31:16,319 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 18:31:16,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-06 18:31:17,205 INFO L134 CoverageAnalysis]: Checked inductivity of 1893 backedges. 2 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:31:17,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:31:17,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-12-06 18:31:17,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-12-06 18:31:17,648 INFO L134 CoverageAnalysis]: Checked inductivity of 1893 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:31:17,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227337489] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:31:17,648 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:31:17,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 52, 53] total 78 [2021-12-06 18:31:17,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117199075] [2021-12-06 18:31:17,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:31:17,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2021-12-06 18:31:17,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:31:17,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-12-06 18:31:17,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=5751, Unknown=0, NotChecked=0, Total=6006 [2021-12-06 18:31:17,649 INFO L87 Difference]: Start difference. First operand 243 states and 267 transitions. Second operand has 78 states, 78 states have (on average 3.5) internal successors, (273), 78 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:31:20,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:31:20,539 INFO L93 Difference]: Finished difference Result 344 states and 368 transitions. [2021-12-06 18:31:20,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-12-06 18:31:20,539 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 3.5) internal successors, (273), 78 states have internal predecessors, (273), 0 states have call successors, (0), 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 173 [2021-12-06 18:31:20,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:31:20,541 INFO L225 Difference]: With dead ends: 344 [2021-12-06 18:31:20,541 INFO L226 Difference]: Without dead ends: 342 [2021-12-06 18:31:20,541 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 449 GetRequests, 313 SyntacticMatches, 9 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3250 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=578, Invalid=15934, Unknown=0, NotChecked=0, Total=16512 [2021-12-06 18:31:20,542 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 178 mSDsluCounter, 2965 mSDsCounter, 0 mSdLazyCounter, 7298 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 3024 SdHoareTripleChecker+Invalid, 7516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 7298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-06 18:31:20,542 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 3024 Invalid, 7516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 7298 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-06 18:31:20,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2021-12-06 18:31:20,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 242. [2021-12-06 18:31:20,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 1.103734439834025) internal successors, (266), 241 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:31:20,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 266 transitions. [2021-12-06 18:31:20,609 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 266 transitions. Word has length 173 [2021-12-06 18:31:20,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:31:20,609 INFO L470 AbstractCegarLoop]: Abstraction has 242 states and 266 transitions. [2021-12-06 18:31:20,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 3.5) internal successors, (273), 78 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:31:20,609 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 266 transitions. [2021-12-06 18:31:20,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-12-06 18:31:20,610 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:31:20,610 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:31:20,633 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2021-12-06 18:31:20,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-12-06 18:31:20,811 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:31:20,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:31:20,812 INFO L85 PathProgramCache]: Analyzing trace with hash 385317042, now seen corresponding path program 60 times [2021-12-06 18:31:20,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:31:20,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338749274] [2021-12-06 18:31:20,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:31:20,813 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:31:20,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:31:21,652 INFO L134 CoverageAnalysis]: Checked inductivity of 1910 backedges. 0 proven. 1910 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:31:21,652 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:31:21,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338749274] [2021-12-06 18:31:21,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338749274] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:31:21,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667229177] [2021-12-06 18:31:21,652 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 18:31:21,652 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:31:21,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:31:21,653 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:31:21,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-12-06 18:31:27,317 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2021-12-06 18:31:27,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:31:27,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 60 conjunts are in the unsatisfiable core [2021-12-06 18:31:27,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:31:28,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 18:31:30,187 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-12-06 18:31:30,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 23 [2021-12-06 18:31:30,226 INFO L134 CoverageAnalysis]: Checked inductivity of 1910 backedges. 1035 proven. 875 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:31:30,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:31:33,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-12-06 18:31:33,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2021-12-06 18:31:33,352 INFO L134 CoverageAnalysis]: Checked inductivity of 1910 backedges. 1012 proven. 898 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:31:33,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667229177] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:31:33,352 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:31:33,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 54, 54] total 132 [2021-12-06 18:31:33,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609213270] [2021-12-06 18:31:33,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:31:33,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 132 states [2021-12-06 18:31:33,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:31:33,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2021-12-06 18:31:33,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1857, Invalid=15434, Unknown=1, NotChecked=0, Total=17292 [2021-12-06 18:31:33,354 INFO L87 Difference]: Start difference. First operand 242 states and 266 transitions. Second operand has 132 states, 132 states have (on average 3.3333333333333335) internal successors, (440), 132 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:31:38,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:31:38,323 INFO L93 Difference]: Finished difference Result 343 states and 367 transitions. [2021-12-06 18:31:38,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2021-12-06 18:31:38,324 INFO L78 Accepts]: Start accepts. Automaton has has 132 states, 132 states have (on average 3.3333333333333335) internal successors, (440), 132 states have internal predecessors, (440), 0 states have call successors, (0), 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 174 [2021-12-06 18:31:38,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:31:38,325 INFO L225 Difference]: With dead ends: 343 [2021-12-06 18:31:38,325 INFO L226 Difference]: Without dead ends: 243 [2021-12-06 18:31:38,327 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 521 GetRequests, 293 SyntacticMatches, 1 SemanticMatches, 227 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9639 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=4428, Invalid=47783, Unknown=1, NotChecked=0, Total=52212 [2021-12-06 18:31:38,327 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 89 mSDsluCounter, 2003 mSDsCounter, 0 mSdLazyCounter, 2097 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 2060 SdHoareTripleChecker+Invalid, 2518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 2097 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 390 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 18:31:38,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 2060 Invalid, 2518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 2097 Invalid, 0 Unknown, 390 Unchecked, 0.5s Time] [2021-12-06 18:31:38,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-12-06 18:31:38,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 242. [2021-12-06 18:31:38,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 1.099585062240664) internal successors, (265), 241 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:31:38,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 265 transitions. [2021-12-06 18:31:38,393 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 265 transitions. Word has length 174 [2021-12-06 18:31:38,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:31:38,393 INFO L470 AbstractCegarLoop]: Abstraction has 242 states and 265 transitions. [2021-12-06 18:31:38,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 132 states, 132 states have (on average 3.3333333333333335) internal successors, (440), 132 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:31:38,393 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 265 transitions. [2021-12-06 18:31:38,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-12-06 18:31:38,394 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:31:38,394 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 25, 24, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:31:38,401 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2021-12-06 18:31:38,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:31:38,595 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:31:38,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:31:38,596 INFO L85 PathProgramCache]: Analyzing trace with hash 902271046, now seen corresponding path program 61 times [2021-12-06 18:31:38,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:31:38,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958532017] [2021-12-06 18:31:38,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:31:38,597 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:31:38,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:31:39,514 INFO L134 CoverageAnalysis]: Checked inductivity of 1983 backedges. 0 proven. 1983 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:31:39,514 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:31:39,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958532017] [2021-12-06 18:31:39,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958532017] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:31:39,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847137564] [2021-12-06 18:31:39,514 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 18:31:39,514 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:31:39,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:31:39,515 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:31:39,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-12-06 18:31:39,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:31:39,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 108 conjunts are in the unsatisfiable core [2021-12-06 18:31:39,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:31:39,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 18:31:39,881 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-06 18:31:39,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2021-12-06 18:31:40,904 INFO L134 CoverageAnalysis]: Checked inductivity of 1983 backedges. 0 proven. 1983 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:31:40,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:31:41,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-12-06 18:31:41,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-12-06 18:31:41,314 INFO L134 CoverageAnalysis]: Checked inductivity of 1983 backedges. 0 proven. 1983 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:31:41,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847137564] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:31:41,314 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:31:41,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 53, 54] total 80 [2021-12-06 18:31:41,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875972516] [2021-12-06 18:31:41,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:31:41,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2021-12-06 18:31:41,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:31:41,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-12-06 18:31:41,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=6061, Unknown=0, NotChecked=0, Total=6320 [2021-12-06 18:31:41,315 INFO L87 Difference]: Start difference. First operand 242 states and 265 transitions. Second operand has 80 states, 80 states have (on average 3.4875) internal successors, (279), 80 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:31:44,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:31:44,491 INFO L93 Difference]: Finished difference Result 357 states and 380 transitions. [2021-12-06 18:31:44,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2021-12-06 18:31:44,491 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 3.4875) internal successors, (279), 80 states have internal predecessors, (279), 0 states have call successors, (0), 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 177 [2021-12-06 18:31:44,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:31:44,492 INFO L225 Difference]: With dead ends: 357 [2021-12-06 18:31:44,492 INFO L226 Difference]: Without dead ends: 355 [2021-12-06 18:31:44,493 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 481 GetRequests, 321 SyntacticMatches, 7 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 5310 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=699, Invalid=23171, Unknown=0, NotChecked=0, Total=23870 [2021-12-06 18:31:44,493 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 210 mSDsluCounter, 3268 mSDsCounter, 0 mSdLazyCounter, 7320 mSolverCounterSat, 270 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 3329 SdHoareTripleChecker+Invalid, 7641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 270 IncrementalHoareTripleChecker+Valid, 7320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-06 18:31:44,494 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 3329 Invalid, 7641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [270 Valid, 7320 Invalid, 0 Unknown, 51 Unchecked, 1.7s Time] [2021-12-06 18:31:44,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2021-12-06 18:31:44,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 247. [2021-12-06 18:31:44,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 1.0975609756097562) internal successors, (270), 246 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:31:44,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 270 transitions. [2021-12-06 18:31:44,565 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 270 transitions. Word has length 177 [2021-12-06 18:31:44,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:31:44,565 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 270 transitions. [2021-12-06 18:31:44,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 3.4875) internal successors, (279), 80 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:31:44,565 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 270 transitions. [2021-12-06 18:31:44,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-12-06 18:31:44,566 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:31:44,566 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 26, 24, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:31:44,586 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2021-12-06 18:31:44,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:31:44,767 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:31:44,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:31:44,768 INFO L85 PathProgramCache]: Analyzing trace with hash -273719246, now seen corresponding path program 62 times [2021-12-06 18:31:44,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:31:44,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213006278] [2021-12-06 18:31:44,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:31:44,769 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:31:44,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:31:45,731 INFO L134 CoverageAnalysis]: Checked inductivity of 2059 backedges. 0 proven. 2059 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:31:45,731 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:31:45,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213006278] [2021-12-06 18:31:45,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213006278] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:31:45,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490936037] [2021-12-06 18:31:45,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:31:45,732 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:31:45,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:31:45,732 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:31:45,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-12-06 18:31:45,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 18:31:45,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:31:45,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 111 conjunts are in the unsatisfiable core [2021-12-06 18:31:45,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:31:46,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 18:31:46,076 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 18:31:46,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-06 18:31:46,120 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 18:31:46,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-06 18:31:47,060 INFO L134 CoverageAnalysis]: Checked inductivity of 2059 backedges. 2 proven. 2057 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:31:47,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:31:47,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-12-06 18:31:47,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-12-06 18:31:47,522 INFO L134 CoverageAnalysis]: Checked inductivity of 2059 backedges. 0 proven. 2058 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:31:47,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490936037] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:31:47,523 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:31:47,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 54, 55] total 81 [2021-12-06 18:31:47,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570719014] [2021-12-06 18:31:47,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:31:47,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2021-12-06 18:31:47,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:31:47,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2021-12-06 18:31:47,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=6215, Unknown=0, NotChecked=0, Total=6480 [2021-12-06 18:31:47,524 INFO L87 Difference]: Start difference. First operand 247 states and 270 transitions. Second operand has 81 states, 81 states have (on average 3.506172839506173) internal successors, (284), 81 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:31:50,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:31:50,447 INFO L93 Difference]: Finished difference Result 352 states and 375 transitions. [2021-12-06 18:31:50,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-12-06 18:31:50,447 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 3.506172839506173) internal successors, (284), 81 states have internal predecessors, (284), 0 states have call successors, (0), 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 180 [2021-12-06 18:31:50,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:31:50,448 INFO L225 Difference]: With dead ends: 352 [2021-12-06 18:31:50,448 INFO L226 Difference]: Without dead ends: 350 [2021-12-06 18:31:50,449 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 467 GetRequests, 326 SyntacticMatches, 9 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3497 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=600, Invalid=17222, Unknown=0, NotChecked=0, Total=17822 [2021-12-06 18:31:50,449 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 197 mSDsluCounter, 3181 mSDsCounter, 0 mSdLazyCounter, 7569 mSolverCounterSat, 236 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 3242 SdHoareTripleChecker+Invalid, 7805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 236 IncrementalHoareTripleChecker+Valid, 7569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-06 18:31:50,449 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 3242 Invalid, 7805 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [236 Valid, 7569 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-06 18:31:50,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2021-12-06 18:31:50,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 246. [2021-12-06 18:31:50,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 1.0979591836734695) internal successors, (269), 245 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:31:50,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 269 transitions. [2021-12-06 18:31:50,524 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 269 transitions. Word has length 180 [2021-12-06 18:31:50,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:31:50,524 INFO L470 AbstractCegarLoop]: Abstraction has 246 states and 269 transitions. [2021-12-06 18:31:50,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 3.506172839506173) internal successors, (284), 81 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:31:50,525 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 269 transitions. [2021-12-06 18:31:50,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2021-12-06 18:31:50,525 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:31:50,525 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:31:50,546 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2021-12-06 18:31:50,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:31:50,726 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:31:50,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:31:50,727 INFO L85 PathProgramCache]: Analyzing trace with hash -197040900, now seen corresponding path program 63 times [2021-12-06 18:31:50,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:31:50,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052045743] [2021-12-06 18:31:50,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:31:50,728 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:31:50,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:31:51,618 INFO L134 CoverageAnalysis]: Checked inductivity of 2077 backedges. 0 proven. 2077 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:31:51,618 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:31:51,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052045743] [2021-12-06 18:31:51,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052045743] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:31:51,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520304777] [2021-12-06 18:31:51,618 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 18:31:51,618 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:31:51,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:31:51,619 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:31:51,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-12-06 18:31:58,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2021-12-06 18:31:58,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:31:58,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 526 conjuncts, 62 conjunts are in the unsatisfiable core [2021-12-06 18:31:58,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:31:58,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 18:32:01,359 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-12-06 18:32:01,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 23 [2021-12-06 18:32:01,402 INFO L134 CoverageAnalysis]: Checked inductivity of 2077 backedges. 1128 proven. 949 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:32:01,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:32:04,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-12-06 18:32:04,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2021-12-06 18:32:04,476 INFO L134 CoverageAnalysis]: Checked inductivity of 2077 backedges. 1104 proven. 973 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:32:04,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520304777] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:32:04,476 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:32:04,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 56, 56] total 137 [2021-12-06 18:32:04,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463784463] [2021-12-06 18:32:04,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:32:04,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 137 states [2021-12-06 18:32:04,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:32:04,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2021-12-06 18:32:04,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1995, Invalid=16637, Unknown=0, NotChecked=0, Total=18632 [2021-12-06 18:32:04,478 INFO L87 Difference]: Start difference. First operand 246 states and 269 transitions. Second operand has 137 states, 137 states have (on average 3.343065693430657) internal successors, (458), 137 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:32:08,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:32:08,688 INFO L93 Difference]: Finished difference Result 351 states and 374 transitions. [2021-12-06 18:32:08,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2021-12-06 18:32:08,688 INFO L78 Accepts]: Start accepts. Automaton has has 137 states, 137 states have (on average 3.343065693430657) internal successors, (458), 137 states have internal predecessors, (458), 0 states have call successors, (0), 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 181 [2021-12-06 18:32:08,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:32:08,689 INFO L225 Difference]: With dead ends: 351 [2021-12-06 18:32:08,689 INFO L226 Difference]: Without dead ends: 247 [2021-12-06 18:32:08,691 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 540 GetRequests, 328 SyntacticMatches, 1 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7851 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=3875, Invalid=41281, Unknown=0, NotChecked=0, Total=45156 [2021-12-06 18:32:08,691 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 116 mSDsluCounter, 1969 mSDsCounter, 0 mSdLazyCounter, 2348 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 2026 SdHoareTripleChecker+Invalid, 2775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 2348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 392 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 18:32:08,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 2026 Invalid, 2775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 2348 Invalid, 0 Unknown, 392 Unchecked, 0.6s Time] [2021-12-06 18:32:08,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-12-06 18:32:08,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 246. [2021-12-06 18:32:08,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 1.0938775510204082) internal successors, (268), 245 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:32:08,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 268 transitions. [2021-12-06 18:32:08,764 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 268 transitions. Word has length 181 [2021-12-06 18:32:08,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:32:08,764 INFO L470 AbstractCegarLoop]: Abstraction has 246 states and 268 transitions. [2021-12-06 18:32:08,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 137 states, 137 states have (on average 3.343065693430657) internal successors, (458), 137 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:32:08,765 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 268 transitions. [2021-12-06 18:32:08,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-12-06 18:32:08,765 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:32:08,765 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 26, 25, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:32:08,788 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2021-12-06 18:32:08,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-12-06 18:32:08,967 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:32:08,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:32:08,968 INFO L85 PathProgramCache]: Analyzing trace with hash -727228696, now seen corresponding path program 64 times [2021-12-06 18:32:08,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:32:08,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299002803] [2021-12-06 18:32:08,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:32:08,969 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:32:09,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:32:09,918 INFO L134 CoverageAnalysis]: Checked inductivity of 2153 backedges. 0 proven. 2153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:32:09,918 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:32:09,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299002803] [2021-12-06 18:32:09,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299002803] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:32:09,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818569601] [2021-12-06 18:32:09,919 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 18:32:09,919 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:32:09,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:32:09,919 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:32:09,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-12-06 18:32:10,087 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 18:32:10,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:32:10,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 534 conjuncts, 112 conjunts are in the unsatisfiable core [2021-12-06 18:32:10,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:32:10,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 18:32:10,292 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-06 18:32:10,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2021-12-06 18:32:11,414 INFO L134 CoverageAnalysis]: Checked inductivity of 2153 backedges. 0 proven. 2153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:32:11,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:32:11,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-12-06 18:32:11,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-12-06 18:32:11,866 INFO L134 CoverageAnalysis]: Checked inductivity of 2153 backedges. 0 proven. 2153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:32:11,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818569601] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:32:11,866 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:32:11,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 55, 56] total 83 [2021-12-06 18:32:11,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444167270] [2021-12-06 18:32:11,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:32:11,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2021-12-06 18:32:11,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:32:11,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-12-06 18:32:11,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=6537, Unknown=0, NotChecked=0, Total=6806 [2021-12-06 18:32:11,867 INFO L87 Difference]: Start difference. First operand 246 states and 268 transitions. Second operand has 83 states, 83 states have (on average 3.4939759036144578) internal successors, (290), 83 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:32:15,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:32:15,354 INFO L93 Difference]: Finished difference Result 365 states and 387 transitions. [2021-12-06 18:32:15,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2021-12-06 18:32:15,354 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 3.4939759036144578) internal successors, (290), 83 states have internal predecessors, (290), 0 states have call successors, (0), 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 184 [2021-12-06 18:32:15,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:32:15,356 INFO L225 Difference]: With dead ends: 365 [2021-12-06 18:32:15,356 INFO L226 Difference]: Without dead ends: 363 [2021-12-06 18:32:15,357 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 334 SyntacticMatches, 7 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 5730 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=726, Invalid=25034, Unknown=0, NotChecked=0, Total=25760 [2021-12-06 18:32:15,357 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 218 mSDsluCounter, 3330 mSDsCounter, 0 mSdLazyCounter, 7929 mSolverCounterSat, 280 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 3393 SdHoareTripleChecker+Invalid, 8218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 280 IncrementalHoareTripleChecker+Valid, 7929 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-06 18:32:15,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 3393 Invalid, 8218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [280 Valid, 7929 Invalid, 0 Unknown, 9 Unchecked, 1.9s Time] [2021-12-06 18:32:15,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2021-12-06 18:32:15,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 251. [2021-12-06 18:32:15,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 250 states have (on average 1.092) internal successors, (273), 250 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:32:15,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 273 transitions. [2021-12-06 18:32:15,435 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 273 transitions. Word has length 184 [2021-12-06 18:32:15,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:32:15,435 INFO L470 AbstractCegarLoop]: Abstraction has 251 states and 273 transitions. [2021-12-06 18:32:15,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 3.4939759036144578) internal successors, (290), 83 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:32:15,435 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 273 transitions. [2021-12-06 18:32:15,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2021-12-06 18:32:15,436 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:32:15,436 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 27, 25, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:32:15,456 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2021-12-06 18:32:15,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-12-06 18:32:15,637 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:32:15,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:32:15,638 INFO L85 PathProgramCache]: Analyzing trace with hash 1337855356, now seen corresponding path program 65 times [2021-12-06 18:32:15,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:32:15,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811998197] [2021-12-06 18:32:15,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:32:15,639 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:32:15,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:32:16,671 INFO L134 CoverageAnalysis]: Checked inductivity of 2232 backedges. 0 proven. 2232 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:32:16,671 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:32:16,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811998197] [2021-12-06 18:32:16,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811998197] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:32:16,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450006016] [2021-12-06 18:32:16,672 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 18:32:16,672 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:32:16,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:32:16,672 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:32:16,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2021-12-06 18:32:18,025 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2021-12-06 18:32:18,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:32:18,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 542 conjuncts, 115 conjunts are in the unsatisfiable core [2021-12-06 18:32:18,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:32:18,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 18:32:18,244 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 18:32:18,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-06 18:32:18,286 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 18:32:18,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-06 18:32:19,306 INFO L134 CoverageAnalysis]: Checked inductivity of 2232 backedges. 2 proven. 2230 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:32:19,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:32:19,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-12-06 18:32:19,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-12-06 18:32:19,857 INFO L134 CoverageAnalysis]: Checked inductivity of 2232 backedges. 0 proven. 2231 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:32:19,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450006016] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:32:19,857 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:32:19,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 56, 57] total 84 [2021-12-06 18:32:19,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330314246] [2021-12-06 18:32:19,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:32:19,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2021-12-06 18:32:19,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:32:19,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2021-12-06 18:32:19,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=6697, Unknown=0, NotChecked=0, Total=6972 [2021-12-06 18:32:19,858 INFO L87 Difference]: Start difference. First operand 251 states and 273 transitions. Second operand has 84 states, 84 states have (on average 3.511904761904762) internal successors, (295), 84 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:32:23,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:32:23,109 INFO L93 Difference]: Finished difference Result 360 states and 382 transitions. [2021-12-06 18:32:23,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2021-12-06 18:32:23,109 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 3.511904761904762) internal successors, (295), 84 states have internal predecessors, (295), 0 states have call successors, (0), 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 187 [2021-12-06 18:32:23,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:32:23,111 INFO L225 Difference]: With dead ends: 360 [2021-12-06 18:32:23,111 INFO L226 Difference]: Without dead ends: 358 [2021-12-06 18:32:23,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 339 SyntacticMatches, 9 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3753 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=622, Invalid=18560, Unknown=0, NotChecked=0, Total=19182 [2021-12-06 18:32:23,112 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 153 mSDsluCounter, 3593 mSDsCounter, 0 mSdLazyCounter, 8691 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 3656 SdHoareTripleChecker+Invalid, 8891 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 8691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:32:23,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 3656 Invalid, 8891 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 8691 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-06 18:32:23,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-12-06 18:32:23,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 250. [2021-12-06 18:32:23,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 1.0923694779116466) internal successors, (272), 249 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:32:23,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 272 transitions. [2021-12-06 18:32:23,192 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 272 transitions. Word has length 187 [2021-12-06 18:32:23,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:32:23,193 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 272 transitions. [2021-12-06 18:32:23,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 3.511904761904762) internal successors, (295), 84 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:32:23,193 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 272 transitions. [2021-12-06 18:32:23,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-12-06 18:32:23,193 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:32:23,194 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:32:23,200 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2021-12-06 18:32:23,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:32:23,395 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:32:23,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:32:23,396 INFO L85 PathProgramCache]: Analyzing trace with hash 1802834590, now seen corresponding path program 66 times [2021-12-06 18:32:23,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:32:23,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435065951] [2021-12-06 18:32:23,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:32:23,397 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:32:23,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:32:24,389 INFO L134 CoverageAnalysis]: Checked inductivity of 2251 backedges. 0 proven. 2251 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:32:24,390 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:32:24,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435065951] [2021-12-06 18:32:24,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435065951] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:32:24,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277889262] [2021-12-06 18:32:24,390 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 18:32:24,390 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:32:24,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:32:24,391 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:32:24,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2021-12-06 18:32:40,571 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2021-12-06 18:32:40,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:32:40,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 65 conjunts are in the unsatisfiable core [2021-12-06 18:32:40,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:32:41,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 18:32:43,918 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-12-06 18:32:43,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 23 [2021-12-06 18:32:43,959 INFO L134 CoverageAnalysis]: Checked inductivity of 2251 backedges. 1225 proven. 1026 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:32:43,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:32:47,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-12-06 18:32:47,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2021-12-06 18:32:47,394 INFO L134 CoverageAnalysis]: Checked inductivity of 2251 backedges. 1200 proven. 1051 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:32:47,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277889262] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:32:47,395 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:32:47,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 58, 58] total 142 [2021-12-06 18:32:47,395 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016136670] [2021-12-06 18:32:47,395 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:32:47,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 142 states [2021-12-06 18:32:47,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:32:47,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2021-12-06 18:32:47,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2138, Invalid=17884, Unknown=0, NotChecked=0, Total=20022 [2021-12-06 18:32:47,397 INFO L87 Difference]: Start difference. First operand 250 states and 272 transitions. Second operand has 142 states, 142 states have (on average 3.352112676056338) internal successors, (476), 142 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:32:51,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:32:51,731 INFO L93 Difference]: Finished difference Result 359 states and 381 transitions. [2021-12-06 18:32:51,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2021-12-06 18:32:51,731 INFO L78 Accepts]: Start accepts. Automaton has has 142 states, 142 states have (on average 3.352112676056338) internal successors, (476), 142 states have internal predecessors, (476), 0 states have call successors, (0), 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 188 [2021-12-06 18:32:51,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:32:51,732 INFO L225 Difference]: With dead ends: 359 [2021-12-06 18:32:51,732 INFO L226 Difference]: Without dead ends: 251 [2021-12-06 18:32:51,735 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 561 GetRequests, 341 SyntacticMatches, 1 SemanticMatches, 219 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8436 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=4145, Invalid=44475, Unknown=0, NotChecked=0, Total=48620 [2021-12-06 18:32:51,735 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 139 mSDsluCounter, 2163 mSDsCounter, 0 mSdLazyCounter, 2269 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 2222 SdHoareTripleChecker+Invalid, 2654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 2269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 352 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 18:32:51,735 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 2222 Invalid, 2654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 2269 Invalid, 0 Unknown, 352 Unchecked, 0.6s Time] [2021-12-06 18:32:51,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-12-06 18:32:51,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 250. [2021-12-06 18:32:51,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 1.0883534136546185) internal successors, (271), 249 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:32:51,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 271 transitions. [2021-12-06 18:32:51,821 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 271 transitions. Word has length 188 [2021-12-06 18:32:51,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:32:51,821 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 271 transitions. [2021-12-06 18:32:51,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 142 states, 142 states have (on average 3.352112676056338) internal successors, (476), 142 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:32:51,821 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 271 transitions. [2021-12-06 18:32:51,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-12-06 18:32:51,822 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:32:51,822 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 27, 26, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:32:51,832 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2021-12-06 18:32:52,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:32:52,023 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:32:52,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:32:52,024 INFO L85 PathProgramCache]: Analyzing trace with hash 128603954, now seen corresponding path program 67 times [2021-12-06 18:32:52,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:32:52,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393352029] [2021-12-06 18:32:52,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:32:52,025 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:32:52,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:32:52,994 INFO L134 CoverageAnalysis]: Checked inductivity of 2330 backedges. 0 proven. 2330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:32:52,994 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:32:52,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393352029] [2021-12-06 18:32:52,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393352029] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:32:52,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107432675] [2021-12-06 18:32:52,995 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 18:32:52,995 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:32:52,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:32:52,995 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:32:52,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2021-12-06 18:32:53,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:32:53,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 553 conjuncts, 116 conjunts are in the unsatisfiable core [2021-12-06 18:32:53,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:32:53,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 18:32:53,377 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-06 18:32:53,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2021-12-06 18:32:54,532 INFO L134 CoverageAnalysis]: Checked inductivity of 2330 backedges. 0 proven. 2330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:32:54,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:32:54,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-12-06 18:32:54,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-12-06 18:32:54,959 INFO L134 CoverageAnalysis]: Checked inductivity of 2330 backedges. 0 proven. 2330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:32:54,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107432675] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:32:54,960 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:32:54,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 57, 58] total 86 [2021-12-06 18:32:54,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404725035] [2021-12-06 18:32:54,960 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:32:54,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2021-12-06 18:32:54,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:32:54,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-12-06 18:32:54,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=7031, Unknown=0, NotChecked=0, Total=7310 [2021-12-06 18:32:54,961 INFO L87 Difference]: Start difference. First operand 250 states and 271 transitions. Second operand has 86 states, 86 states have (on average 3.5) internal successors, (301), 86 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:32:58,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:32:58,488 INFO L93 Difference]: Finished difference Result 373 states and 394 transitions. [2021-12-06 18:32:58,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2021-12-06 18:32:58,489 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 3.5) internal successors, (301), 86 states have internal predecessors, (301), 0 states have call successors, (0), 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 191 [2021-12-06 18:32:58,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:32:58,490 INFO L225 Difference]: With dead ends: 373 [2021-12-06 18:32:58,490 INFO L226 Difference]: Without dead ends: 371 [2021-12-06 18:32:58,491 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 519 GetRequests, 347 SyntacticMatches, 7 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 6166 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=753, Invalid=26969, Unknown=0, NotChecked=0, Total=27722 [2021-12-06 18:32:58,491 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 284 mSDsluCounter, 3610 mSDsCounter, 0 mSdLazyCounter, 7864 mSolverCounterSat, 343 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 3675 SdHoareTripleChecker+Invalid, 8262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 343 IncrementalHoareTripleChecker+Valid, 7864 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-06 18:32:58,491 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 3675 Invalid, 8262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [343 Valid, 7864 Invalid, 0 Unknown, 55 Unchecked, 1.9s Time] [2021-12-06 18:32:58,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2021-12-06 18:32:58,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 255. [2021-12-06 18:32:58,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 1.0866141732283465) internal successors, (276), 254 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:32:58,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 276 transitions. [2021-12-06 18:32:58,581 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 276 transitions. Word has length 191 [2021-12-06 18:32:58,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:32:58,581 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 276 transitions. [2021-12-06 18:32:58,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 3.5) internal successors, (301), 86 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:32:58,581 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 276 transitions. [2021-12-06 18:32:58,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-12-06 18:32:58,582 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:32:58,582 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 28, 26, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:32:58,602 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2021-12-06 18:32:58,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2021-12-06 18:32:58,783 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:32:58,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:32:58,784 INFO L85 PathProgramCache]: Analyzing trace with hash 578935326, now seen corresponding path program 68 times [2021-12-06 18:32:58,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:32:58,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569126696] [2021-12-06 18:32:58,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:32:58,785 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:32:58,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:32:59,959 INFO L134 CoverageAnalysis]: Checked inductivity of 2412 backedges. 0 proven. 2412 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:32:59,960 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:32:59,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569126696] [2021-12-06 18:32:59,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569126696] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:32:59,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777822960] [2021-12-06 18:32:59,960 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:32:59,960 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:32:59,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:32:59,960 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:32:59,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2021-12-06 18:33:00,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 18:33:00,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:33:00,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 119 conjunts are in the unsatisfiable core [2021-12-06 18:33:00,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:33:00,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 18:33:00,321 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 18:33:00,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-06 18:33:00,364 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 18:33:00,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-06 18:33:01,519 INFO L134 CoverageAnalysis]: Checked inductivity of 2412 backedges. 2 proven. 2410 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:33:01,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:33:01,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-12-06 18:33:01,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-12-06 18:33:02,049 INFO L134 CoverageAnalysis]: Checked inductivity of 2412 backedges. 0 proven. 2411 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:33:02,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777822960] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:33:02,050 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:33:02,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 58, 59] total 87 [2021-12-06 18:33:02,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713478277] [2021-12-06 18:33:02,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:33:02,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2021-12-06 18:33:02,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:33:02,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2021-12-06 18:33:02,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=7197, Unknown=0, NotChecked=0, Total=7482 [2021-12-06 18:33:02,052 INFO L87 Difference]: Start difference. First operand 255 states and 276 transitions. Second operand has 87 states, 87 states have (on average 3.5172413793103448) internal successors, (306), 87 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:33:05,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:33:05,542 INFO L93 Difference]: Finished difference Result 368 states and 389 transitions. [2021-12-06 18:33:05,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2021-12-06 18:33:05,542 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 3.5172413793103448) internal successors, (306), 87 states have internal predecessors, (306), 0 states have call successors, (0), 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 194 [2021-12-06 18:33:05,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:33:05,543 INFO L225 Difference]: With dead ends: 368 [2021-12-06 18:33:05,543 INFO L226 Difference]: Without dead ends: 366 [2021-12-06 18:33:05,544 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 503 GetRequests, 352 SyntacticMatches, 9 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4018 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=644, Invalid=19948, Unknown=0, NotChecked=0, Total=20592 [2021-12-06 18:33:05,545 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 159 mSDsluCounter, 3666 mSDsCounter, 0 mSdLazyCounter, 9126 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 3731 SdHoareTripleChecker+Invalid, 9331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 9126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-06 18:33:05,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 3731 Invalid, 9331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 9126 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-06 18:33:05,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-12-06 18:33:05,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 254. [2021-12-06 18:33:05,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 253 states have (on average 1.0869565217391304) internal successors, (275), 253 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:33:05,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 275 transitions. [2021-12-06 18:33:05,636 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 275 transitions. Word has length 194 [2021-12-06 18:33:05,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:33:05,636 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 275 transitions. [2021-12-06 18:33:05,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 3.5172413793103448) internal successors, (306), 87 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:33:05,637 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 275 transitions. [2021-12-06 18:33:05,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-12-06 18:33:05,637 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:33:05,637 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:33:05,657 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2021-12-06 18:33:05,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-12-06 18:33:05,838 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:33:05,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:33:05,839 INFO L85 PathProgramCache]: Analyzing trace with hash -129051160, now seen corresponding path program 69 times [2021-12-06 18:33:05,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:33:05,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519897669] [2021-12-06 18:33:05,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:33:05,841 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:33:05,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:33:06,891 INFO L134 CoverageAnalysis]: Checked inductivity of 2432 backedges. 0 proven. 2432 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:33:06,891 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:33:06,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519897669] [2021-12-06 18:33:06,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519897669] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:33:06,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145814798] [2021-12-06 18:33:06,892 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 18:33:06,892 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:33:06,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:33:06,892 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:33:06,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2021-12-06 18:33:24,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2021-12-06 18:33:24,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:33:24,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 564 conjuncts, 66 conjunts are in the unsatisfiable core [2021-12-06 18:33:24,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:33:25,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 18:33:28,312 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-12-06 18:33:28,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 23 [2021-12-06 18:33:28,358 INFO L134 CoverageAnalysis]: Checked inductivity of 2432 backedges. 1326 proven. 1106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:33:28,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:33:32,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-12-06 18:33:32,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2021-12-06 18:33:32,114 INFO L134 CoverageAnalysis]: Checked inductivity of 2432 backedges. 1300 proven. 1132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:33:32,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145814798] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:33:32,114 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:33:32,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 60, 60] total 147 [2021-12-06 18:33:32,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483065485] [2021-12-06 18:33:32,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:33:32,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 147 states [2021-12-06 18:33:32,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:33:32,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 147 interpolants. [2021-12-06 18:33:32,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2286, Invalid=19175, Unknown=1, NotChecked=0, Total=21462 [2021-12-06 18:33:32,117 INFO L87 Difference]: Start difference. First operand 254 states and 275 transitions. Second operand has 147 states, 147 states have (on average 3.360544217687075) internal successors, (494), 147 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:33:38,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:33:38,293 INFO L93 Difference]: Finished difference Result 367 states and 388 transitions. [2021-12-06 18:33:38,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2021-12-06 18:33:38,293 INFO L78 Accepts]: Start accepts. Automaton has has 147 states, 147 states have (on average 3.360544217687075) internal successors, (494), 147 states have internal predecessors, (494), 0 states have call successors, (0), 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 195 [2021-12-06 18:33:38,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:33:38,294 INFO L225 Difference]: With dead ends: 367 [2021-12-06 18:33:38,294 INFO L226 Difference]: Without dead ends: 255 [2021-12-06 18:33:38,297 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 585 GetRequests, 330 SyntacticMatches, 1 SemanticMatches, 254 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12012 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=5421, Invalid=59858, Unknown=1, NotChecked=0, Total=65280 [2021-12-06 18:33:38,297 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 174 mSDsluCounter, 2362 mSDsCounter, 0 mSdLazyCounter, 2716 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 2426 SdHoareTripleChecker+Invalid, 4119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 2716 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1340 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 18:33:38,297 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 2426 Invalid, 4119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 2716 Invalid, 0 Unknown, 1340 Unchecked, 0.7s Time] [2021-12-06 18:33:38,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-12-06 18:33:38,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 254. [2021-12-06 18:33:38,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 253 states have (on average 1.08300395256917) internal successors, (274), 253 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:33:38,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 274 transitions. [2021-12-06 18:33:38,391 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 274 transitions. Word has length 195 [2021-12-06 18:33:38,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:33:38,391 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 274 transitions. [2021-12-06 18:33:38,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 147 states, 147 states have (on average 3.360544217687075) internal successors, (494), 147 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:33:38,392 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 274 transitions. [2021-12-06 18:33:38,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2021-12-06 18:33:38,392 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:33:38,392 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 28, 27, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:33:38,417 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2021-12-06 18:33:38,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:33:38,594 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:33:38,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:33:38,595 INFO L85 PathProgramCache]: Analyzing trace with hash 76743380, now seen corresponding path program 70 times [2021-12-06 18:33:38,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:33:38,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007101636] [2021-12-06 18:33:38,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:33:38,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:33:38,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:33:39,671 INFO L134 CoverageAnalysis]: Checked inductivity of 2514 backedges. 0 proven. 2514 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:33:39,672 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:33:39,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007101636] [2021-12-06 18:33:39,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007101636] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:33:39,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485918608] [2021-12-06 18:33:39,672 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 18:33:39,672 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:33:39,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:33:39,673 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:33:39,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2021-12-06 18:33:39,846 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 18:33:39,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:33:39,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 572 conjuncts, 120 conjunts are in the unsatisfiable core [2021-12-06 18:33:39,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:33:39,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 18:33:40,066 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-06 18:33:40,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2021-12-06 18:33:41,246 INFO L134 CoverageAnalysis]: Checked inductivity of 2514 backedges. 0 proven. 2514 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:33:41,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:33:41,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-12-06 18:33:41,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-12-06 18:33:41,687 INFO L134 CoverageAnalysis]: Checked inductivity of 2514 backedges. 0 proven. 2514 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:33:41,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485918608] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:33:41,687 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:33:41,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 59, 60] total 89 [2021-12-06 18:33:41,688 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327225592] [2021-12-06 18:33:41,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:33:41,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2021-12-06 18:33:41,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:33:41,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2021-12-06 18:33:41,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=7543, Unknown=0, NotChecked=0, Total=7832 [2021-12-06 18:33:41,689 INFO L87 Difference]: Start difference. First operand 254 states and 274 transitions. Second operand has 89 states, 89 states have (on average 3.50561797752809) internal successors, (312), 89 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:33:45,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:33:45,995 INFO L93 Difference]: Finished difference Result 381 states and 401 transitions. [2021-12-06 18:33:45,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2021-12-06 18:33:45,995 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 3.50561797752809) internal successors, (312), 89 states have internal predecessors, (312), 0 states have call successors, (0), 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 198 [2021-12-06 18:33:45,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:33:45,997 INFO L225 Difference]: With dead ends: 381 [2021-12-06 18:33:45,997 INFO L226 Difference]: Without dead ends: 379 [2021-12-06 18:33:45,998 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 538 GetRequests, 360 SyntacticMatches, 7 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 6618 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=780, Invalid=28976, Unknown=0, NotChecked=0, Total=29756 [2021-12-06 18:33:45,998 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 228 mSDsluCounter, 4282 mSDsCounter, 0 mSdLazyCounter, 10012 mSolverCounterSat, 302 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 4349 SdHoareTripleChecker+Invalid, 10461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 302 IncrementalHoareTripleChecker+Valid, 10012 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 147 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-06 18:33:45,998 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 4349 Invalid, 10461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [302 Valid, 10012 Invalid, 0 Unknown, 147 Unchecked, 2.5s Time] [2021-12-06 18:33:45,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-12-06 18:33:46,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 259. [2021-12-06 18:33:46,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 1.0813953488372092) internal successors, (279), 258 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:33:46,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 279 transitions. [2021-12-06 18:33:46,099 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 279 transitions. Word has length 198 [2021-12-06 18:33:46,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:33:46,099 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 279 transitions. [2021-12-06 18:33:46,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 3.50561797752809) internal successors, (312), 89 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:33:46,099 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 279 transitions. [2021-12-06 18:33:46,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2021-12-06 18:33:46,100 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:33:46,100 INFO L514 BasicCegarLoop]: trace histogram [29, 29, 29, 27, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:33:46,120 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2021-12-06 18:33:46,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:33:46,301 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:33:46,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:33:46,302 INFO L85 PathProgramCache]: Analyzing trace with hash 1983553128, now seen corresponding path program 71 times [2021-12-06 18:33:46,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:33:46,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869035412] [2021-12-06 18:33:46,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:33:46,303 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:33:46,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:33:47,465 INFO L134 CoverageAnalysis]: Checked inductivity of 2599 backedges. 0 proven. 2599 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:33:47,465 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:33:47,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869035412] [2021-12-06 18:33:47,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869035412] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:33:47,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859829798] [2021-12-06 18:33:47,466 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 18:33:47,466 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:33:47,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:33:47,466 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:33:47,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2021-12-06 18:33:54,290 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2021-12-06 18:33:54,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:33:54,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 580 conjuncts, 123 conjunts are in the unsatisfiable core [2021-12-06 18:33:54,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:33:54,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 18:33:54,548 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 18:33:54,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-06 18:33:54,601 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 18:33:54,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-06 18:33:55,928 INFO L134 CoverageAnalysis]: Checked inductivity of 2599 backedges. 2 proven. 2597 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:33:55,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:33:56,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-12-06 18:33:56,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-12-06 18:33:56,451 INFO L134 CoverageAnalysis]: Checked inductivity of 2599 backedges. 0 proven. 2598 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:33:56,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859829798] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:33:56,451 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:33:56,451 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 60, 61] total 90 [2021-12-06 18:33:56,451 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870685557] [2021-12-06 18:33:56,451 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:33:56,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2021-12-06 18:33:56,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:33:56,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2021-12-06 18:33:56,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=295, Invalid=7715, Unknown=0, NotChecked=0, Total=8010 [2021-12-06 18:33:56,452 INFO L87 Difference]: Start difference. First operand 259 states and 279 transitions. Second operand has 90 states, 90 states have (on average 3.522222222222222) internal successors, (317), 90 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:34:00,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:34:00,296 INFO L93 Difference]: Finished difference Result 376 states and 396 transitions. [2021-12-06 18:34:00,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2021-12-06 18:34:00,296 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 3.522222222222222) internal successors, (317), 90 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 201 [2021-12-06 18:34:00,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:34:00,297 INFO L225 Difference]: With dead ends: 376 [2021-12-06 18:34:00,297 INFO L226 Difference]: Without dead ends: 374 [2021-12-06 18:34:00,298 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 521 GetRequests, 365 SyntacticMatches, 9 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4292 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=666, Invalid=21386, Unknown=0, NotChecked=0, Total=22052 [2021-12-06 18:34:00,298 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 211 mSDsluCounter, 3658 mSDsCounter, 0 mSdLazyCounter, 9115 mSolverCounterSat, 256 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 3725 SdHoareTripleChecker+Invalid, 9371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 256 IncrementalHoareTripleChecker+Valid, 9115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-06 18:34:00,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 3725 Invalid, 9371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [256 Valid, 9115 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-06 18:34:00,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2021-12-06 18:34:00,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 258. [2021-12-06 18:34:00,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 257 states have (on average 1.0817120622568093) internal successors, (278), 257 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:34:00,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 278 transitions. [2021-12-06 18:34:00,396 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 278 transitions. Word has length 201 [2021-12-06 18:34:00,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:34:00,397 INFO L470 AbstractCegarLoop]: Abstraction has 258 states and 278 transitions. [2021-12-06 18:34:00,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 3.522222222222222) internal successors, (317), 90 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:34:00,397 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 278 transitions. [2021-12-06 18:34:00,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2021-12-06 18:34:00,397 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:34:00,398 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:34:00,406 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2021-12-06 18:34:00,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-12-06 18:34:00,599 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:34:00,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:34:00,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1277894518, now seen corresponding path program 72 times [2021-12-06 18:34:00,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:34:00,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10201525] [2021-12-06 18:34:00,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:34:00,601 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:34:00,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:34:01,765 INFO L134 CoverageAnalysis]: Checked inductivity of 2620 backedges. 0 proven. 2620 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:34:01,765 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:34:01,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10201525] [2021-12-06 18:34:01,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10201525] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:34:01,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795214843] [2021-12-06 18:34:01,765 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 18:34:01,766 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:34:01,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:34:01,766 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:34:01,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2021-12-06 18:34:43,034 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 29 check-sat command(s) [2021-12-06 18:34:43,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:34:43,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 583 conjuncts, 68 conjunts are in the unsatisfiable core [2021-12-06 18:34:43,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:34:43,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 18:34:46,848 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-12-06 18:34:46,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 23 [2021-12-06 18:34:46,894 INFO L134 CoverageAnalysis]: Checked inductivity of 2620 backedges. 1431 proven. 1189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:34:46,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:34:50,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-12-06 18:34:50,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2021-12-06 18:34:50,875 INFO L134 CoverageAnalysis]: Checked inductivity of 2620 backedges. 1404 proven. 1216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:34:50,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795214843] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:34:50,876 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:34:50,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 62, 62] total 152 [2021-12-06 18:34:50,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160062027] [2021-12-06 18:34:50,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:34:50,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 152 states [2021-12-06 18:34:50,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:34:50,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2021-12-06 18:34:50,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2439, Invalid=20512, Unknown=1, NotChecked=0, Total=22952 [2021-12-06 18:34:50,878 INFO L87 Difference]: Start difference. First operand 258 states and 278 transitions. Second operand has 152 states, 152 states have (on average 3.3684210526315788) internal successors, (512), 152 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:34:55,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:34:55,969 INFO L93 Difference]: Finished difference Result 375 states and 395 transitions. [2021-12-06 18:34:55,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2021-12-06 18:34:55,970 INFO L78 Accepts]: Start accepts. Automaton has has 152 states, 152 states have (on average 3.3684210526315788) internal successors, (512), 152 states have internal predecessors, (512), 0 states have call successors, (0), 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 202 [2021-12-06 18:34:55,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:34:55,971 INFO L225 Difference]: With dead ends: 375 [2021-12-06 18:34:55,971 INFO L226 Difference]: Without dead ends: 259 [2021-12-06 18:34:55,973 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 603 GetRequests, 367 SyntacticMatches, 1 SemanticMatches, 235 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9669 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=4712, Invalid=51219, Unknown=1, NotChecked=0, Total=55932 [2021-12-06 18:34:55,973 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 149 mSDsluCounter, 2346 mSDsCounter, 0 mSdLazyCounter, 2977 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 2409 SdHoareTripleChecker+Invalid, 3363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 2977 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 323 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 18:34:55,973 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 2409 Invalid, 3363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 2977 Invalid, 0 Unknown, 323 Unchecked, 0.7s Time] [2021-12-06 18:34:55,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-12-06 18:34:56,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 258. [2021-12-06 18:34:56,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 257 states have (on average 1.0778210116731517) internal successors, (277), 257 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:34:56,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 277 transitions. [2021-12-06 18:34:56,076 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 277 transitions. Word has length 202 [2021-12-06 18:34:56,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:34:56,076 INFO L470 AbstractCegarLoop]: Abstraction has 258 states and 277 transitions. [2021-12-06 18:34:56,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 152 states, 152 states have (on average 3.3684210526315788) internal successors, (512), 152 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:34:56,077 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 277 transitions. [2021-12-06 18:34:56,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2021-12-06 18:34:56,077 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:34:56,077 INFO L514 BasicCegarLoop]: trace histogram [29, 29, 29, 28, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:34:56,090 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2021-12-06 18:34:56,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-12-06 18:34:56,278 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:34:56,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:34:56,279 INFO L85 PathProgramCache]: Analyzing trace with hash -1973644770, now seen corresponding path program 73 times [2021-12-06 18:34:56,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:34:56,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68472033] [2021-12-06 18:34:56,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:34:56,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:34:56,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:34:57,527 INFO L134 CoverageAnalysis]: Checked inductivity of 2705 backedges. 0 proven. 2705 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:34:57,528 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:34:57,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68472033] [2021-12-06 18:34:57,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68472033] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:34:57,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331959031] [2021-12-06 18:34:57,528 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 18:34:57,528 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:34:57,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:34:57,529 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:34:57,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2021-12-06 18:34:57,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:34:57,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 591 conjuncts, 124 conjunts are in the unsatisfiable core [2021-12-06 18:34:57,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:34:57,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 18:34:57,973 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-06 18:34:57,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2021-12-06 18:34:59,489 INFO L134 CoverageAnalysis]: Checked inductivity of 2705 backedges. 0 proven. 2705 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:34:59,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:34:59,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-12-06 18:34:59,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-12-06 18:35:00,012 INFO L134 CoverageAnalysis]: Checked inductivity of 2705 backedges. 0 proven. 2705 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:35:00,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331959031] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:35:00,012 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:35:00,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 61, 62] total 92 [2021-12-06 18:35:00,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642078528] [2021-12-06 18:35:00,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:35:00,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2021-12-06 18:35:00,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:35:00,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2021-12-06 18:35:00,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=8073, Unknown=0, NotChecked=0, Total=8372 [2021-12-06 18:35:00,014 INFO L87 Difference]: Start difference. First operand 258 states and 277 transitions. Second operand has 92 states, 92 states have (on average 3.510869565217391) internal successors, (323), 92 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:35:04,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:35:04,384 INFO L93 Difference]: Finished difference Result 389 states and 408 transitions. [2021-12-06 18:35:04,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2021-12-06 18:35:04,384 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 3.510869565217391) internal successors, (323), 92 states have internal predecessors, (323), 0 states have call successors, (0), 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 205 [2021-12-06 18:35:04,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:35:04,386 INFO L225 Difference]: With dead ends: 389 [2021-12-06 18:35:04,386 INFO L226 Difference]: Without dead ends: 387 [2021-12-06 18:35:04,387 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 557 GetRequests, 373 SyntacticMatches, 7 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 7086 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=807, Invalid=31055, Unknown=0, NotChecked=0, Total=31862 [2021-12-06 18:35:04,387 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 246 mSDsluCounter, 4032 mSDsCounter, 0 mSdLazyCounter, 9461 mSolverCounterSat, 316 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 4101 SdHoareTripleChecker+Invalid, 9836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 316 IncrementalHoareTripleChecker+Valid, 9461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-06 18:35:04,387 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 4101 Invalid, 9836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [316 Valid, 9461 Invalid, 0 Unknown, 59 Unchecked, 2.4s Time] [2021-12-06 18:35:04,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-12-06 18:35:04,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 263. [2021-12-06 18:35:04,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 1.0763358778625953) internal successors, (282), 262 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:35:04,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 282 transitions. [2021-12-06 18:35:04,498 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 282 transitions. Word has length 205 [2021-12-06 18:35:04,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:35:04,498 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 282 transitions. [2021-12-06 18:35:04,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 3.510869565217391) internal successors, (323), 92 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:35:04,498 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 282 transitions. [2021-12-06 18:35:04,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2021-12-06 18:35:04,499 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:35:04,499 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 30, 28, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:35:04,519 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2021-12-06 18:35:04,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-12-06 18:35:04,700 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:35:04,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:35:04,701 INFO L85 PathProgramCache]: Analyzing trace with hash -1557231606, now seen corresponding path program 74 times [2021-12-06 18:35:04,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:35:04,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564134852] [2021-12-06 18:35:04,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:35:04,702 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:35:04,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:35:05,880 INFO L134 CoverageAnalysis]: Checked inductivity of 2793 backedges. 0 proven. 2793 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:35:05,880 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:35:05,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564134852] [2021-12-06 18:35:05,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564134852] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:35:05,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508900683] [2021-12-06 18:35:05,880 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:35:05,881 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:35:05,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:35:05,881 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:35:05,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2021-12-06 18:35:06,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 18:35:06,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:35:06,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 599 conjuncts, 127 conjunts are in the unsatisfiable core [2021-12-06 18:35:06,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:35:06,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 18:35:06,280 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 18:35:06,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-06 18:35:06,327 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 18:35:06,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-06 18:35:07,582 INFO L134 CoverageAnalysis]: Checked inductivity of 2793 backedges. 2 proven. 2791 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:35:07,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:35:07,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-12-06 18:35:07,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-12-06 18:35:08,117 INFO L134 CoverageAnalysis]: Checked inductivity of 2793 backedges. 0 proven. 2792 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:35:08,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508900683] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:35:08,117 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:35:08,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 62, 63] total 93 [2021-12-06 18:35:08,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482740868] [2021-12-06 18:35:08,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:35:08,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2021-12-06 18:35:08,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:35:08,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2021-12-06 18:35:08,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=8251, Unknown=0, NotChecked=0, Total=8556 [2021-12-06 18:35:08,119 INFO L87 Difference]: Start difference. First operand 263 states and 282 transitions. Second operand has 93 states, 93 states have (on average 3.5268817204301075) internal successors, (328), 93 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:35:11,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:35:11,982 INFO L93 Difference]: Finished difference Result 384 states and 403 transitions. [2021-12-06 18:35:11,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2021-12-06 18:35:11,982 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 3.5268817204301075) internal successors, (328), 93 states have internal predecessors, (328), 0 states have call successors, (0), 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 208 [2021-12-06 18:35:11,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:35:11,984 INFO L225 Difference]: With dead ends: 384 [2021-12-06 18:35:11,984 INFO L226 Difference]: Without dead ends: 382 [2021-12-06 18:35:11,985 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 539 GetRequests, 378 SyntacticMatches, 9 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4575 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=688, Invalid=22874, Unknown=0, NotChecked=0, Total=23562 [2021-12-06 18:35:11,985 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 224 mSDsluCounter, 4209 mSDsCounter, 0 mSdLazyCounter, 10304 mSolverCounterSat, 266 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 4278 SdHoareTripleChecker+Invalid, 10570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 266 IncrementalHoareTripleChecker+Valid, 10304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-06 18:35:11,985 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 4278 Invalid, 10570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [266 Valid, 10304 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-06 18:35:11,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2021-12-06 18:35:12,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 262. [2021-12-06 18:35:12,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 1.0766283524904214) internal successors, (281), 261 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:35:12,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 281 transitions. [2021-12-06 18:35:12,094 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 281 transitions. Word has length 208 [2021-12-06 18:35:12,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:35:12,094 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 281 transitions. [2021-12-06 18:35:12,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 3.5268817204301075) internal successors, (328), 93 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:35:12,094 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 281 transitions. [2021-12-06 18:35:12,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2021-12-06 18:35:12,095 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:35:12,095 INFO L514 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:35:12,116 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2021-12-06 18:35:12,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-12-06 18:35:12,296 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:35:12,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:35:12,297 INFO L85 PathProgramCache]: Analyzing trace with hash 273791700, now seen corresponding path program 75 times [2021-12-06 18:35:12,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:35:12,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205125945] [2021-12-06 18:35:12,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:35:12,298 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:35:12,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:35:13,467 INFO L134 CoverageAnalysis]: Checked inductivity of 2815 backedges. 0 proven. 2815 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:35:13,467 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:35:13,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205125945] [2021-12-06 18:35:13,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205125945] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:35:13,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085676176] [2021-12-06 18:35:13,467 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 18:35:13,467 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:35:13,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:35:13,468 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:35:13,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2021-12-06 18:35:35,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2021-12-06 18:35:35,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:35:35,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 602 conjuncts, 70 conjunts are in the unsatisfiable core [2021-12-06 18:35:35,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:35:36,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 18:35:39,426 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-12-06 18:35:39,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 23 [2021-12-06 18:35:39,478 INFO L134 CoverageAnalysis]: Checked inductivity of 2815 backedges. 1540 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:35:39,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:35:43,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-12-06 18:35:43,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2021-12-06 18:35:43,441 INFO L134 CoverageAnalysis]: Checked inductivity of 2815 backedges. 1512 proven. 1303 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:35:43,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085676176] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:35:43,442 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:35:43,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 64, 64] total 157 [2021-12-06 18:35:43,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249914078] [2021-12-06 18:35:43,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:35:43,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 157 states [2021-12-06 18:35:43,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:35:43,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 157 interpolants. [2021-12-06 18:35:43,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2597, Invalid=21895, Unknown=0, NotChecked=0, Total=24492 [2021-12-06 18:35:43,444 INFO L87 Difference]: Start difference. First operand 262 states and 281 transitions. Second operand has 157 states, 157 states have (on average 3.375796178343949) internal successors, (530), 157 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:35:50,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:35:50,425 INFO L93 Difference]: Finished difference Result 382 states and 401 transitions. [2021-12-06 18:35:50,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2021-12-06 18:35:50,425 INFO L78 Accepts]: Start accepts. Automaton has has 157 states, 157 states have (on average 3.375796178343949) internal successors, (530), 157 states have internal predecessors, (530), 0 states have call successors, (0), 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 209 [2021-12-06 18:35:50,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:35:50,426 INFO L225 Difference]: With dead ends: 382 [2021-12-06 18:35:50,426 INFO L226 Difference]: Without dead ends: 262 [2021-12-06 18:35:50,428 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 626 GetRequests, 354 SyntacticMatches, 1 SemanticMatches, 271 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13620 ImplicationChecksByTransitivity, 13.8s TimeCoverageRelationStatistics Valid=6073, Invalid=68183, Unknown=0, NotChecked=0, Total=74256 [2021-12-06 18:35:50,429 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 190 mSDsluCounter, 2517 mSDsCounter, 0 mSdLazyCounter, 3026 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 2586 SdHoareTripleChecker+Invalid, 4642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 3026 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1581 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 18:35:50,429 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 2586 Invalid, 4642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 3026 Invalid, 0 Unknown, 1581 Unchecked, 0.7s Time] [2021-12-06 18:35:50,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-12-06 18:35:50,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 262. [2021-12-06 18:35:50,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 1.0727969348659003) internal successors, (280), 261 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:35:50,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 280 transitions. [2021-12-06 18:35:50,537 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 280 transitions. Word has length 209 [2021-12-06 18:35:50,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:35:50,537 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 280 transitions. [2021-12-06 18:35:50,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 157 states, 157 states have (on average 3.375796178343949) internal successors, (530), 157 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:35:50,538 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 280 transitions. [2021-12-06 18:35:50,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2021-12-06 18:35:50,538 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:35:50,538 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 30, 29, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:35:50,548 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2021-12-06 18:35:50,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:35:50,740 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:35:50,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:35:50,741 INFO L85 PathProgramCache]: Analyzing trace with hash -501294400, now seen corresponding path program 76 times [2021-12-06 18:35:50,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:35:50,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594962430] [2021-12-06 18:35:50,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:35:50,742 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:35:50,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:35:51,968 INFO L134 CoverageAnalysis]: Checked inductivity of 2903 backedges. 0 proven. 2903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:35:51,969 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:35:51,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594962430] [2021-12-06 18:35:51,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594962430] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:35:51,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656025145] [2021-12-06 18:35:51,969 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 18:35:51,969 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:35:51,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:35:51,969 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:35:51,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2021-12-06 18:35:52,158 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 18:35:52,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:35:52,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 610 conjuncts, 128 conjunts are in the unsatisfiable core [2021-12-06 18:35:52,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:35:52,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 18:35:52,427 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-06 18:35:52,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2021-12-06 18:35:53,774 INFO L134 CoverageAnalysis]: Checked inductivity of 2903 backedges. 0 proven. 2903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:35:53,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:35:54,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-12-06 18:35:54,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-12-06 18:35:54,248 INFO L134 CoverageAnalysis]: Checked inductivity of 2903 backedges. 0 proven. 2903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:35:54,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656025145] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:35:54,248 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:35:54,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 63, 64] total 95 [2021-12-06 18:35:54,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924737367] [2021-12-06 18:35:54,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:35:54,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2021-12-06 18:35:54,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:35:54,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2021-12-06 18:35:54,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=309, Invalid=8621, Unknown=0, NotChecked=0, Total=8930 [2021-12-06 18:35:54,250 INFO L87 Difference]: Start difference. First operand 262 states and 280 transitions. Second operand has 95 states, 95 states have (on average 3.5157894736842104) internal successors, (334), 95 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:35:59,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:35:59,321 INFO L93 Difference]: Finished difference Result 397 states and 415 transitions. [2021-12-06 18:35:59,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 154 states. [2021-12-06 18:35:59,321 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 3.5157894736842104) internal successors, (334), 95 states have internal predecessors, (334), 0 states have call successors, (0), 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 212 [2021-12-06 18:35:59,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:35:59,323 INFO L225 Difference]: With dead ends: 397 [2021-12-06 18:35:59,323 INFO L226 Difference]: Without dead ends: 395 [2021-12-06 18:35:59,324 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 576 GetRequests, 386 SyntacticMatches, 7 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 7570 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=834, Invalid=33206, Unknown=0, NotChecked=0, Total=34040 [2021-12-06 18:35:59,324 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 256 mSDsluCounter, 4688 mSDsCounter, 0 mSdLazyCounter, 10438 mSolverCounterSat, 325 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 4759 SdHoareTripleChecker+Invalid, 10768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 325 IncrementalHoareTripleChecker+Valid, 10438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-06 18:35:59,324 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 4759 Invalid, 10768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [325 Valid, 10438 Invalid, 0 Unknown, 5 Unchecked, 2.8s Time] [2021-12-06 18:35:59,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2021-12-06 18:35:59,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 267. [2021-12-06 18:35:59,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 1.0714285714285714) internal successors, (285), 266 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:35:59,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 285 transitions. [2021-12-06 18:35:59,448 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 285 transitions. Word has length 212 [2021-12-06 18:35:59,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:35:59,448 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 285 transitions. [2021-12-06 18:35:59,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 3.5157894736842104) internal successors, (334), 95 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:35:59,448 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 285 transitions. [2021-12-06 18:35:59,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2021-12-06 18:35:59,449 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:35:59,449 INFO L514 BasicCegarLoop]: trace histogram [31, 31, 31, 29, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:35:59,469 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2021-12-06 18:35:59,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:35:59,650 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:35:59,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:35:59,651 INFO L85 PathProgramCache]: Analyzing trace with hash -1347116204, now seen corresponding path program 77 times [2021-12-06 18:35:59,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:35:59,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501025501] [2021-12-06 18:35:59,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:35:59,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:35:59,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:36:00,945 INFO L134 CoverageAnalysis]: Checked inductivity of 2994 backedges. 0 proven. 2994 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:36:00,945 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:36:00,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501025501] [2021-12-06 18:36:00,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501025501] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:36:00,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423220971] [2021-12-06 18:36:00,945 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 18:36:00,946 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:36:00,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:36:00,946 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:36:00,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2021-12-06 18:36:05,252 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 32 check-sat command(s) [2021-12-06 18:36:05,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:36:05,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 618 conjuncts, 131 conjunts are in the unsatisfiable core [2021-12-06 18:36:05,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:36:05,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 18:36:05,466 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 18:36:05,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-06 18:36:05,512 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 18:36:05,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-06 18:36:06,872 INFO L134 CoverageAnalysis]: Checked inductivity of 2994 backedges. 2 proven. 2992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:36:06,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:36:07,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-12-06 18:36:07,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-12-06 18:36:07,446 INFO L134 CoverageAnalysis]: Checked inductivity of 2994 backedges. 0 proven. 2993 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:36:07,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423220971] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:36:07,446 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:36:07,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 64, 65] total 96 [2021-12-06 18:36:07,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142113232] [2021-12-06 18:36:07,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:36:07,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2021-12-06 18:36:07,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:36:07,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2021-12-06 18:36:07,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=315, Invalid=8805, Unknown=0, NotChecked=0, Total=9120 [2021-12-06 18:36:07,448 INFO L87 Difference]: Start difference. First operand 267 states and 285 transitions. Second operand has 96 states, 96 states have (on average 3.53125) internal successors, (339), 96 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:36:11,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:36:11,669 INFO L93 Difference]: Finished difference Result 392 states and 410 transitions. [2021-12-06 18:36:11,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2021-12-06 18:36:11,670 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 3.53125) internal successors, (339), 96 states have internal predecessors, (339), 0 states have call successors, (0), 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 215 [2021-12-06 18:36:11,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:36:11,671 INFO L225 Difference]: With dead ends: 392 [2021-12-06 18:36:11,671 INFO L226 Difference]: Without dead ends: 390 [2021-12-06 18:36:11,672 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 557 GetRequests, 391 SyntacticMatches, 9 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4867 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=710, Invalid=24412, Unknown=0, NotChecked=0, Total=25122 [2021-12-06 18:36:11,672 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 235 mSDsluCounter, 4283 mSDsCounter, 0 mSdLazyCounter, 10408 mSolverCounterSat, 277 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 4354 SdHoareTripleChecker+Invalid, 10685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 277 IncrementalHoareTripleChecker+Valid, 10408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-06 18:36:11,672 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 4354 Invalid, 10685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [277 Valid, 10408 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-06 18:36:11,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-12-06 18:36:11,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 266. [2021-12-06 18:36:11,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 265 states have (on average 1.0716981132075472) internal successors, (284), 265 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:36:11,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 284 transitions. [2021-12-06 18:36:11,798 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 284 transitions. Word has length 215 [2021-12-06 18:36:11,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:36:11,798 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 284 transitions. [2021-12-06 18:36:11,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 3.53125) internal successors, (339), 96 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:36:11,798 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 284 transitions. [2021-12-06 18:36:11,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2021-12-06 18:36:11,799 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:36:11,799 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:36:11,822 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2021-12-06 18:36:11,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable82 [2021-12-06 18:36:12,000 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:36:12,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:36:12,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1231363466, now seen corresponding path program 78 times [2021-12-06 18:36:12,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:36:12,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094287322] [2021-12-06 18:36:12,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:36:12,002 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:36:12,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:36:13,207 INFO L134 CoverageAnalysis]: Checked inductivity of 3017 backedges. 0 proven. 3017 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:36:13,207 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:36:13,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094287322] [2021-12-06 18:36:13,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094287322] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:36:13,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870004151] [2021-12-06 18:36:13,208 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 18:36:13,208 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:36:13,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:36:13,208 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:36:13,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2021-12-06 18:39:00,273 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2021-12-06 18:39:00,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:39:00,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 621 conjuncts, 72 conjunts are in the unsatisfiable core [2021-12-06 18:39:00,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:39:01,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 18:39:04,762 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-12-06 18:39:04,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 23 [2021-12-06 18:39:04,820 INFO L134 CoverageAnalysis]: Checked inductivity of 3017 backedges. 1653 proven. 1364 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:39:04,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:39:08,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-12-06 18:39:08,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2021-12-06 18:39:09,025 INFO L134 CoverageAnalysis]: Checked inductivity of 3017 backedges. 1624 proven. 1393 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:39:09,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870004151] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:39:09,026 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:39:09,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 66, 66] total 162 [2021-12-06 18:39:09,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088012141] [2021-12-06 18:39:09,026 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:39:09,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 162 states [2021-12-06 18:39:09,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:39:09,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 162 interpolants. [2021-12-06 18:39:09,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2760, Invalid=23322, Unknown=0, NotChecked=0, Total=26082 [2021-12-06 18:39:09,028 INFO L87 Difference]: Start difference. First operand 266 states and 284 transitions. Second operand has 162 states, 162 states have (on average 3.382716049382716) internal successors, (548), 162 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:39:14,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:39:14,708 INFO L93 Difference]: Finished difference Result 391 states and 409 transitions. [2021-12-06 18:39:14,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2021-12-06 18:39:14,708 INFO L78 Accepts]: Start accepts. Automaton has has 162 states, 162 states have (on average 3.382716049382716) internal successors, (548), 162 states have internal predecessors, (548), 0 states have call successors, (0), 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 216 [2021-12-06 18:39:14,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:39:14,709 INFO L225 Difference]: With dead ends: 391 [2021-12-06 18:39:14,709 INFO L226 Difference]: Without dead ends: 267 [2021-12-06 18:39:14,711 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 644 GetRequests, 392 SyntacticMatches, 1 SemanticMatches, 251 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10986 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=5315, Invalid=58441, Unknown=0, NotChecked=0, Total=63756 [2021-12-06 18:39:14,711 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 136 mSDsluCounter, 2361 mSDsCounter, 0 mSdLazyCounter, 3156 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 2428 SdHoareTripleChecker+Invalid, 3530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 3156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 334 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-06 18:39:14,711 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 2428 Invalid, 3530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 3156 Invalid, 0 Unknown, 334 Unchecked, 0.8s Time] [2021-12-06 18:39:14,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-12-06 18:39:14,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 266. [2021-12-06 18:39:14,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 265 states have (on average 1.0679245283018868) internal successors, (283), 265 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:39:14,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 283 transitions. [2021-12-06 18:39:14,836 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 283 transitions. Word has length 216 [2021-12-06 18:39:14,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:39:14,836 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 283 transitions. [2021-12-06 18:39:14,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 162 states, 162 states have (on average 3.382716049382716) internal successors, (548), 162 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:39:14,836 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 283 transitions. [2021-12-06 18:39:14,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2021-12-06 18:39:14,837 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:39:14,837 INFO L514 BasicCegarLoop]: trace histogram [31, 31, 31, 30, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:39:14,860 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2021-12-06 18:39:15,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:39:15,038 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:39:15,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:39:15,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1137557238, now seen corresponding path program 79 times [2021-12-06 18:39:15,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:39:15,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590810960] [2021-12-06 18:39:15,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:39:15,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:39:15,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:39:16,276 INFO L134 CoverageAnalysis]: Checked inductivity of 3108 backedges. 0 proven. 3108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:39:16,276 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:39:16,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590810960] [2021-12-06 18:39:16,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590810960] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:39:16,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928898443] [2021-12-06 18:39:16,276 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 18:39:16,276 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:39:16,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:39:16,277 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:39:16,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2021-12-06 18:39:16,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:39:16,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 629 conjuncts, 132 conjunts are in the unsatisfiable core [2021-12-06 18:39:16,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:39:16,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 18:39:16,720 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-06 18:39:16,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2021-12-06 18:39:18,155 INFO L134 CoverageAnalysis]: Checked inductivity of 3108 backedges. 0 proven. 3108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:39:18,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:39:18,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-12-06 18:39:18,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-12-06 18:39:18,708 INFO L134 CoverageAnalysis]: Checked inductivity of 3108 backedges. 0 proven. 3108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:39:18,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928898443] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:39:18,708 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:39:18,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 65, 66] total 98 [2021-12-06 18:39:18,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398154605] [2021-12-06 18:39:18,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:39:18,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2021-12-06 18:39:18,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:39:18,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2021-12-06 18:39:18,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=319, Invalid=9187, Unknown=0, NotChecked=0, Total=9506 [2021-12-06 18:39:18,710 INFO L87 Difference]: Start difference. First operand 266 states and 283 transitions. Second operand has 98 states, 98 states have (on average 3.520408163265306) internal successors, (345), 98 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:39:23,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:39:23,659 INFO L93 Difference]: Finished difference Result 405 states and 422 transitions. [2021-12-06 18:39:23,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 159 states. [2021-12-06 18:39:23,660 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 3.520408163265306) internal successors, (345), 98 states have internal predecessors, (345), 0 states have call successors, (0), 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 219 [2021-12-06 18:39:23,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:39:23,661 INFO L225 Difference]: With dead ends: 405 [2021-12-06 18:39:23,661 INFO L226 Difference]: Without dead ends: 403 [2021-12-06 18:39:23,663 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 595 GetRequests, 399 SyntacticMatches, 7 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 8070 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=861, Invalid=35429, Unknown=0, NotChecked=0, Total=36290 [2021-12-06 18:39:23,663 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 264 mSDsluCounter, 4769 mSDsCounter, 0 mSdLazyCounter, 11352 mSolverCounterSat, 338 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 4842 SdHoareTripleChecker+Invalid, 11699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 338 IncrementalHoareTripleChecker+Valid, 11352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-06 18:39:23,663 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 4842 Invalid, 11699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [338 Valid, 11352 Invalid, 0 Unknown, 9 Unchecked, 2.7s Time] [2021-12-06 18:39:23,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2021-12-06 18:39:23,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 271. [2021-12-06 18:39:23,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 270 states have (on average 1.0666666666666667) internal successors, (288), 270 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:39:23,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 288 transitions. [2021-12-06 18:39:23,801 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 288 transitions. Word has length 219 [2021-12-06 18:39:23,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:39:23,801 INFO L470 AbstractCegarLoop]: Abstraction has 271 states and 288 transitions. [2021-12-06 18:39:23,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 3.520408163265306) internal successors, (345), 98 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:39:23,801 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 288 transitions. [2021-12-06 18:39:23,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2021-12-06 18:39:23,802 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:39:23,802 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 32, 30, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:39:23,823 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2021-12-06 18:39:24,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:39:24,003 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:39:24,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:39:24,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1715038710, now seen corresponding path program 80 times [2021-12-06 18:39:24,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:39:24,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442924502] [2021-12-06 18:39:24,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:39:24,005 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:39:24,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:39:25,301 INFO L134 CoverageAnalysis]: Checked inductivity of 3202 backedges. 0 proven. 3202 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:39:25,302 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:39:25,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442924502] [2021-12-06 18:39:25,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442924502] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:39:25,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208892839] [2021-12-06 18:39:25,302 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:39:25,302 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:39:25,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:39:25,303 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:39:25,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2021-12-06 18:39:25,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 18:39:25,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:39:25,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 637 conjuncts, 137 conjunts are in the unsatisfiable core [2021-12-06 18:39:25,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:39:25,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 18:39:25,781 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 18:39:25,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-06 18:39:25,917 INFO L354 Elim1Store]: treesize reduction 80, result has 20.8 percent of original size [2021-12-06 18:39:25,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 38 [2021-12-06 18:39:29,136 INFO L134 CoverageAnalysis]: Checked inductivity of 3202 backedges. 2 proven. 3200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:39:29,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:39:30,054 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_5517| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_5517| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (and (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_5517| 4)) 0) (+ 116 |c_ULTIMATE.start_main_~a~0#1.offset|)) 0) (< 28 |v_ULTIMATE.start_main_~i~0#1_5517|)))) is different from false [2021-12-06 18:39:30,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 25 [2021-12-06 18:39:30,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 49 [2021-12-06 18:39:30,242 INFO L134 CoverageAnalysis]: Checked inductivity of 3202 backedges. 0 proven. 3171 refuted. 0 times theorem prover too weak. 0 trivial. 31 not checked. [2021-12-06 18:39:30,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208892839] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:39:30,242 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:39:30,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 68, 68] total 105 [2021-12-06 18:39:30,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611293809] [2021-12-06 18:39:30,242 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:39:30,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2021-12-06 18:39:30,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:39:30,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2021-12-06 18:39:30,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=392, Invalid=10323, Unknown=1, NotChecked=204, Total=10920 [2021-12-06 18:39:30,244 INFO L87 Difference]: Start difference. First operand 271 states and 288 transitions. Second operand has 105 states, 105 states have (on average 3.4095238095238094) internal successors, (358), 105 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:39:32,686 WARN L838 $PredicateComparison]: unable to prove that (and (<= |c_ULTIMATE.start_main_~i~0#1| 29) (<= 29 |c_ULTIMATE.start_main_~i~0#1|) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4))) 0) (forall ((|v_ULTIMATE.start_main_~i~0#1_5517| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_5517| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (and (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_5517| 4)) 0) (+ 116 |c_ULTIMATE.start_main_~a~0#1.offset|)) 0) (< 28 |v_ULTIMATE.start_main_~i~0#1_5517|))))) is different from false [2021-12-06 18:39:33,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:39:33,132 INFO L93 Difference]: Finished difference Result 512 states and 531 transitions. [2021-12-06 18:39:33,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-12-06 18:39:33,132 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 3.4095238095238094) internal successors, (358), 105 states have internal predecessors, (358), 0 states have call successors, (0), 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 222 [2021-12-06 18:39:33,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:39:33,134 INFO L225 Difference]: With dead ends: 512 [2021-12-06 18:39:33,134 INFO L226 Difference]: Without dead ends: 510 [2021-12-06 18:39:33,135 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 540 GetRequests, 401 SyntacticMatches, 6 SemanticMatches, 133 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 2646 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=510, Invalid=17052, Unknown=2, NotChecked=526, Total=18090 [2021-12-06 18:39:33,135 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 182 mSDsluCounter, 4340 mSDsCounter, 0 mSdLazyCounter, 5604 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 4407 SdHoareTripleChecker+Invalid, 6314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 5604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 673 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-06 18:39:33,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 4407 Invalid, 6314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 5604 Invalid, 0 Unknown, 673 Unchecked, 1.4s Time] [2021-12-06 18:39:33,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2021-12-06 18:39:33,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 274. [2021-12-06 18:39:33,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 1.0732600732600732) internal successors, (293), 273 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:39:33,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 293 transitions. [2021-12-06 18:39:33,269 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 293 transitions. Word has length 222 [2021-12-06 18:39:33,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:39:33,270 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 293 transitions. [2021-12-06 18:39:33,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 3.4095238095238094) internal successors, (358), 105 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:39:33,270 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 293 transitions. [2021-12-06 18:39:33,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2021-12-06 18:39:33,271 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:39:33,271 INFO L514 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:39:33,293 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2021-12-06 18:39:33,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2021-12-06 18:39:33,471 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:39:33,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:39:33,472 INFO L85 PathProgramCache]: Analyzing trace with hash -258075712, now seen corresponding path program 81 times [2021-12-06 18:39:33,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:39:33,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408757252] [2021-12-06 18:39:33,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:39:33,474 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:39:33,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:39:34,767 INFO L134 CoverageAnalysis]: Checked inductivity of 3226 backedges. 0 proven. 3226 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:39:34,767 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:39:34,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408757252] [2021-12-06 18:39:34,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408757252] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:39:34,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052551229] [2021-12-06 18:39:34,768 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 18:39:34,768 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:39:34,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:39:34,769 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:39:34,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2021-12-06 18:40:09,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 32 check-sat command(s) [2021-12-06 18:40:09,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:40:09,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 640 conjuncts, 74 conjunts are in the unsatisfiable core [2021-12-06 18:40:09,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:40:10,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 18:40:14,076 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-12-06 18:40:14,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 23 [2021-12-06 18:40:14,130 INFO L134 CoverageAnalysis]: Checked inductivity of 3226 backedges. 1770 proven. 1456 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:40:14,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:40:18,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-12-06 18:40:18,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2021-12-06 18:40:18,649 INFO L134 CoverageAnalysis]: Checked inductivity of 3226 backedges. 1740 proven. 1486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:40:18,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052551229] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:40:18,649 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:40:18,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 68, 68] total 167 [2021-12-06 18:40:18,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25073975] [2021-12-06 18:40:18,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:40:18,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 167 states [2021-12-06 18:40:18,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:40:18,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 167 interpolants. [2021-12-06 18:40:18,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2928, Invalid=24794, Unknown=0, NotChecked=0, Total=27722 [2021-12-06 18:40:18,652 INFO L87 Difference]: Start difference. First operand 274 states and 293 transitions. Second operand has 167 states, 167 states have (on average 3.3892215568862274) internal successors, (566), 167 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:40:26,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:40:26,670 INFO L93 Difference]: Finished difference Result 404 states and 423 transitions. [2021-12-06 18:40:26,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 160 states. [2021-12-06 18:40:26,671 INFO L78 Accepts]: Start accepts. Automaton has has 167 states, 167 states have (on average 3.3892215568862274) internal successors, (566), 167 states have internal predecessors, (566), 0 states have call successors, (0), 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 223 [2021-12-06 18:40:26,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:40:26,672 INFO L225 Difference]: With dead ends: 404 [2021-12-06 18:40:26,672 INFO L226 Difference]: Without dead ends: 276 [2021-12-06 18:40:26,675 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 668 GetRequests, 378 SyntacticMatches, 1 SemanticMatches, 289 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15455 ImplicationChecksByTransitivity, 15.5s TimeCoverageRelationStatistics Valid=6830, Invalid=77560, Unknown=0, NotChecked=0, Total=84390 [2021-12-06 18:40:26,675 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 174 mSDsluCounter, 2849 mSDsCounter, 0 mSdLazyCounter, 2976 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 2921 SdHoareTripleChecker+Invalid, 4011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 2976 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1001 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 18:40:26,675 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 2921 Invalid, 4011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 2976 Invalid, 0 Unknown, 1001 Unchecked, 0.7s Time] [2021-12-06 18:40:26,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2021-12-06 18:40:26,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 274. [2021-12-06 18:40:26,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 1.0695970695970696) internal successors, (292), 273 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:40:26,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 292 transitions. [2021-12-06 18:40:26,815 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 292 transitions. Word has length 223 [2021-12-06 18:40:26,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:40:26,815 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 292 transitions. [2021-12-06 18:40:26,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 167 states, 167 states have (on average 3.3892215568862274) internal successors, (566), 167 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:40:26,815 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 292 transitions. [2021-12-06 18:40:26,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2021-12-06 18:40:26,816 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:40:26,816 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 32, 31, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:40:26,827 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2021-12-06 18:40:27,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-12-06 18:40:27,017 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:40:27,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:40:27,018 INFO L85 PathProgramCache]: Analyzing trace with hash 2144265900, now seen corresponding path program 82 times [2021-12-06 18:40:27,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:40:27,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000311411] [2021-12-06 18:40:27,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:40:27,019 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:40:27,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:40:28,412 INFO L134 CoverageAnalysis]: Checked inductivity of 3320 backedges. 0 proven. 3320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:40:28,412 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:40:28,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000311411] [2021-12-06 18:40:28,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000311411] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:40:28,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305047156] [2021-12-06 18:40:28,413 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 18:40:28,413 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:40:28,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:40:28,413 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:40:28,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2021-12-06 18:40:28,615 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 18:40:28,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:40:28,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 648 conjuncts, 136 conjunts are in the unsatisfiable core [2021-12-06 18:40:28,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:40:28,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 18:40:28,884 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-06 18:40:28,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2021-12-06 18:40:30,500 INFO L134 CoverageAnalysis]: Checked inductivity of 3320 backedges. 0 proven. 3320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:40:30,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:40:30,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-12-06 18:40:30,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-12-06 18:40:30,989 INFO L134 CoverageAnalysis]: Checked inductivity of 3320 backedges. 0 proven. 3320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:40:30,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305047156] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:40:30,989 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:40:30,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 67, 68] total 101 [2021-12-06 18:40:30,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659320268] [2021-12-06 18:40:30,990 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:40:30,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2021-12-06 18:40:30,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:40:30,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2021-12-06 18:40:30,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=9771, Unknown=0, NotChecked=0, Total=10100 [2021-12-06 18:40:30,991 INFO L87 Difference]: Start difference. First operand 274 states and 292 transitions. Second operand has 101 states, 101 states have (on average 3.5247524752475248) internal successors, (356), 101 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:40:36,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:40:36,213 INFO L93 Difference]: Finished difference Result 537 states and 555 transitions. [2021-12-06 18:40:36,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 164 states. [2021-12-06 18:40:36,213 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 3.5247524752475248) internal successors, (356), 101 states have internal predecessors, (356), 0 states have call successors, (0), 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 226 [2021-12-06 18:40:36,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:40:36,215 INFO L225 Difference]: With dead ends: 537 [2021-12-06 18:40:36,215 INFO L226 Difference]: Without dead ends: 535 [2021-12-06 18:40:36,216 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 614 GetRequests, 412 SyntacticMatches, 7 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 8586 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=888, Invalid=37724, Unknown=0, NotChecked=0, Total=38612 [2021-12-06 18:40:36,217 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 274 mSDsluCounter, 5174 mSDsCounter, 0 mSdLazyCounter, 11206 mSolverCounterSat, 350 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 5251 SdHoareTripleChecker+Invalid, 11621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 350 IncrementalHoareTripleChecker+Valid, 11206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-06 18:40:36,217 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [274 Valid, 5251 Invalid, 11621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [350 Valid, 11206 Invalid, 0 Unknown, 65 Unchecked, 2.7s Time] [2021-12-06 18:40:36,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2021-12-06 18:40:36,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 279. [2021-12-06 18:40:36,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 278 states have (on average 1.0683453237410072) internal successors, (297), 278 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:40:36,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 297 transitions. [2021-12-06 18:40:36,363 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 297 transitions. Word has length 226 [2021-12-06 18:40:36,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:40:36,363 INFO L470 AbstractCegarLoop]: Abstraction has 279 states and 297 transitions. [2021-12-06 18:40:36,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 3.5247524752475248) internal successors, (356), 101 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:40:36,364 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 297 transitions. [2021-12-06 18:40:36,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2021-12-06 18:40:36,364 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:40:36,365 INFO L514 BasicCegarLoop]: trace histogram [33, 33, 33, 31, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:40:36,385 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2021-12-06 18:40:36,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:40:36,565 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:40:36,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:40:36,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1031791552, now seen corresponding path program 83 times [2021-12-06 18:40:36,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:40:36,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974681878] [2021-12-06 18:40:36,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:40:36,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:40:36,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:40:38,056 INFO L134 CoverageAnalysis]: Checked inductivity of 3417 backedges. 0 proven. 3417 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:40:38,056 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:40:38,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974681878] [2021-12-06 18:40:38,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974681878] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:40:38,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240660493] [2021-12-06 18:40:38,056 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 18:40:38,057 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:40:38,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:40:38,057 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:40:38,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40e738de-1f61-4840-a783-1b4d956f90fc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process