./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-examples/sorting_selectionsort_ground-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-examples/sorting_selectionsort_ground-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 5aa72773233f17156d62ec9c7729aefdd69e77cc68e9bdd6e006eaf36895d27a --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 07:57:39,176 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 07:57:39,178 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 07:57:39,242 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 07:57:39,243 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 07:57:39,245 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 07:57:39,246 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 07:57:39,248 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 07:57:39,250 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 07:57:39,255 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 07:57:39,255 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 07:57:39,256 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 07:57:39,257 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 07:57:39,260 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 07:57:39,261 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 07:57:39,264 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 07:57:39,265 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 07:57:39,265 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 07:57:39,267 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 07:57:39,271 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 07:57:39,272 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 07:57:39,273 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 07:57:39,274 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 07:57:39,275 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 07:57:39,280 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 07:57:39,281 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 07:57:39,281 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 07:57:39,282 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 07:57:39,282 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 07:57:39,283 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 07:57:39,283 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 07:57:39,284 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 07:57:39,285 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 07:57:39,286 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 07:57:39,287 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 07:57:39,287 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 07:57:39,287 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 07:57:39,287 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 07:57:39,288 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 07:57:39,288 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 07:57:39,289 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 07:57:39,289 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 07:57:39,314 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 07:57:39,315 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 07:57:39,315 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 07:57:39,315 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 07:57:39,316 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 07:57:39,316 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 07:57:39,316 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 07:57:39,317 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 07:57:39,317 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 07:57:39,317 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 07:57:39,317 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 07:57:39,318 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 07:57:39,318 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 07:57:39,318 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 07:57:39,318 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 07:57:39,318 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 07:57:39,318 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 07:57:39,319 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 07:57:39,319 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 07:57:39,319 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 07:57:39,319 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 07:57:39,319 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 07:57:39,319 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 07:57:39,320 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 07:57:39,320 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 07:57:39,320 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 07:57:39,320 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 07:57:39,321 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 07:57:39,321 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 07:57:39,321 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 07:57:39,321 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 07:57:39,322 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 07:57:39,322 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 07:57:39,322 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 07:57:39,322 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:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5aa72773233f17156d62ec9c7729aefdd69e77cc68e9bdd6e006eaf36895d27a [2021-12-22 07:57:39,533 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 07:57:39,562 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 07:57:39,564 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 07:57:39,565 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 07:57:39,567 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 07:57:39,568 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/sorting_selectionsort_ground-1.i [2021-12-22 07:57:39,616 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f01366c03/bdadfbc8b8364fd4a7d7715278fdb425/FLAG5d409fef3 [2021-12-22 07:57:39,970 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 07:57:39,970 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/sorting_selectionsort_ground-1.i [2021-12-22 07:57:39,978 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f01366c03/bdadfbc8b8364fd4a7d7715278fdb425/FLAG5d409fef3 [2021-12-22 07:57:39,989 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f01366c03/bdadfbc8b8364fd4a7d7715278fdb425 [2021-12-22 07:57:39,991 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 07:57:39,992 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 07:57:39,994 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 07:57:39,994 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 07:57:39,996 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 07:57:39,999 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:57:39" (1/1) ... [2021-12-22 07:57:39,999 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75d13d8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:57:39, skipping insertion in model container [2021-12-22 07:57:40,000 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:57:39" (1/1) ... [2021-12-22 07:57:40,004 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 07:57:40,015 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 07:57:40,136 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/sorting_selectionsort_ground-1.i[823,836] [2021-12-22 07:57:40,164 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 07:57:40,170 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 07:57:40,184 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/sorting_selectionsort_ground-1.i[823,836] [2021-12-22 07:57:40,203 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 07:57:40,213 INFO L208 MainTranslator]: Completed translation [2021-12-22 07:57:40,214 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:57:40 WrapperNode [2021-12-22 07:57:40,214 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 07:57:40,219 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 07:57:40,219 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 07:57:40,219 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 07:57:40,224 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:57:40" (1/1) ... [2021-12-22 07:57:40,233 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:57:40" (1/1) ... [2021-12-22 07:57:40,252 INFO L137 Inliner]: procedures = 16, calls = 25, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 114 [2021-12-22 07:57:40,253 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 07:57:40,253 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 07:57:40,254 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 07:57:40,254 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 07:57:40,259 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:57:40" (1/1) ... [2021-12-22 07:57:40,259 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:57:40" (1/1) ... [2021-12-22 07:57:40,263 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:57:40" (1/1) ... [2021-12-22 07:57:40,263 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:57:40" (1/1) ... [2021-12-22 07:57:40,276 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:57:40" (1/1) ... [2021-12-22 07:57:40,280 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:57:40" (1/1) ... [2021-12-22 07:57:40,283 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:57:40" (1/1) ... [2021-12-22 07:57:40,286 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 07:57:40,287 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 07:57:40,288 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 07:57:40,288 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 07:57:40,289 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:57:40" (1/1) ... [2021-12-22 07:57:40,293 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 07:57:40,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 07:57:40,310 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-22 07:57:40,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-22 07:57:40,332 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 07:57:40,333 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 07:57:40,333 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-22 07:57:40,333 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-22 07:57:40,333 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 07:57:40,333 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 07:57:40,333 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-22 07:57:40,333 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-22 07:57:40,334 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-22 07:57:40,334 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-22 07:57:40,375 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 07:57:40,377 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 07:57:40,530 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 07:57:40,534 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 07:57:40,534 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-12-22 07:57:40,535 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:57:40 BoogieIcfgContainer [2021-12-22 07:57:40,536 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 07:57:40,537 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 07:57:40,537 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 07:57:40,539 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 07:57:40,540 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:57:39" (1/3) ... [2021-12-22 07:57:40,540 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37940b99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:57:40, skipping insertion in model container [2021-12-22 07:57:40,540 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:57:40" (2/3) ... [2021-12-22 07:57:40,541 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37940b99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:57:40, skipping insertion in model container [2021-12-22 07:57:40,541 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:57:40" (3/3) ... [2021-12-22 07:57:40,542 INFO L111 eAbstractionObserver]: Analyzing ICFG sorting_selectionsort_ground-1.i [2021-12-22 07:57:40,545 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 07:57:40,545 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 07:57:40,575 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 07:57:40,580 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 [2021-12-22 07:57:40,580 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-22 07:57:40,598 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 34 states have (on average 1.588235294117647) internal successors, (54), 35 states have internal predecessors, (54), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-22 07:57:40,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-22 07:57:40,607 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 07:57:40,607 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 07:57:40,608 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 07:57:40,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 07:57:40,613 INFO L85 PathProgramCache]: Analyzing trace with hash -1922481208, now seen corresponding path program 1 times [2021-12-22 07:57:40,619 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 07:57:40,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995658550] [2021-12-22 07:57:40,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 07:57:40,621 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 07:57:40,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 07:57:40,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 07:57:40,748 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 07:57:40,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995658550] [2021-12-22 07:57:40,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995658550] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 07:57:40,749 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 07:57:40,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 07:57:40,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899621709] [2021-12-22 07:57:40,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 07:57:40,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 07:57:40,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 07:57:40,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 07:57:40,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 07:57:40,777 INFO L87 Difference]: Start difference. First operand has 40 states, 34 states have (on average 1.588235294117647) internal successors, (54), 35 states have internal predecessors, (54), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 07:57:40,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 07:57:40,813 INFO L93 Difference]: Finished difference Result 78 states and 121 transitions. [2021-12-22 07:57:40,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 07:57:40,815 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-12-22 07:57:40,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 07:57:40,823 INFO L225 Difference]: With dead ends: 78 [2021-12-22 07:57:40,824 INFO L226 Difference]: Without dead ends: 38 [2021-12-22 07:57:40,826 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 07:57:40,832 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 1 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 07:57:40,833 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 96 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 07:57:40,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-12-22 07:57:40,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2021-12-22 07:57:40,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.3125) internal successors, (42), 32 states have internal predecessors, (42), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-22 07:57:40,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2021-12-22 07:57:40,872 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 12 [2021-12-22 07:57:40,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 07:57:40,873 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2021-12-22 07:57:40,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 07:57:40,874 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2021-12-22 07:57:40,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-22 07:57:40,875 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 07:57:40,876 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 07:57:40,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 07:57:40,877 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 07:57:40,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 07:57:40,879 INFO L85 PathProgramCache]: Analyzing trace with hash -326095532, now seen corresponding path program 1 times [2021-12-22 07:57:40,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 07:57:40,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461442539] [2021-12-22 07:57:40,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 07:57:40,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 07:57:40,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 07:57:40,940 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 07:57:40,940 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 07:57:40,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461442539] [2021-12-22 07:57:40,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461442539] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 07:57:40,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206076907] [2021-12-22 07:57:40,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 07:57:40,943 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 07:57:40,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 07:57:40,945 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 07:57:40,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 07:57:40,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 07:57:40,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 07:57:40,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 07:57:41,018 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 07:57:41,019 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 07:57:41,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206076907] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 07:57:41,019 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 07:57:41,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-12-22 07:57:41,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230386115] [2021-12-22 07:57:41,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 07:57:41,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 07:57:41,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 07:57:41,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 07:57:41,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-22 07:57:41,022 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 07:57:41,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 07:57:41,046 INFO L93 Difference]: Finished difference Result 68 states and 89 transitions. [2021-12-22 07:57:41,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 07:57:41,046 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-12-22 07:57:41,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 07:57:41,047 INFO L225 Difference]: With dead ends: 68 [2021-12-22 07:57:41,047 INFO L226 Difference]: Without dead ends: 55 [2021-12-22 07:57:41,048 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-22 07:57:41,049 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 24 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 07:57:41,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 72 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 07:57:41,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-12-22 07:57:41,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 38. [2021-12-22 07:57:41,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.303030303030303) internal successors, (43), 33 states have internal predecessors, (43), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-22 07:57:41,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 49 transitions. [2021-12-22 07:57:41,055 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 49 transitions. Word has length 14 [2021-12-22 07:57:41,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 07:57:41,056 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 49 transitions. [2021-12-22 07:57:41,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 07:57:41,056 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 49 transitions. [2021-12-22 07:57:41,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-22 07:57:41,056 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 07:57:41,057 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 07:57:41,076 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-22 07:57:41,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 07:57:41,273 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 07:57:41,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 07:57:41,273 INFO L85 PathProgramCache]: Analyzing trace with hash -916904651, now seen corresponding path program 1 times [2021-12-22 07:57:41,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 07:57:41,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532162144] [2021-12-22 07:57:41,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 07:57:41,274 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 07:57:41,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 07:57:41,299 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 07:57:41,299 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 07:57:41,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532162144] [2021-12-22 07:57:41,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532162144] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 07:57:41,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131303014] [2021-12-22 07:57:41,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 07:57:41,300 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 07:57:41,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 07:57:41,301 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 07:57:41,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-22 07:57:41,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 07:57:41,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 07:57:41,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 07:57:41,397 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 07:57:41,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 07:57:41,432 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 07:57:41,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131303014] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 07:57:41,432 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 07:57:41,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-12-22 07:57:41,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511240382] [2021-12-22 07:57:41,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 07:57:41,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 07:57:41,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 07:57:41,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 07:57:41,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-22 07:57:41,434 INFO L87 Difference]: Start difference. First operand 38 states and 49 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 07:57:41,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 07:57:41,451 INFO L93 Difference]: Finished difference Result 77 states and 101 transitions. [2021-12-22 07:57:41,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 07:57:41,452 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-12-22 07:57:41,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 07:57:41,453 INFO L225 Difference]: With dead ends: 77 [2021-12-22 07:57:41,453 INFO L226 Difference]: Without dead ends: 44 [2021-12-22 07:57:41,453 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-22 07:57:41,454 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 6 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 07:57:41,455 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 88 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 07:57:41,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-12-22 07:57:41,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-12-22 07:57:41,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 39 states have (on average 1.2564102564102564) internal successors, (49), 39 states have internal predecessors, (49), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-22 07:57:41,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 55 transitions. [2021-12-22 07:57:41,459 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 55 transitions. Word has length 16 [2021-12-22 07:57:41,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 07:57:41,460 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 55 transitions. [2021-12-22 07:57:41,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 07:57:41,460 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 55 transitions. [2021-12-22 07:57:41,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-22 07:57:41,460 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 07:57:41,461 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 07:57:41,493 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-22 07:57:41,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-12-22 07:57:41,677 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 07:57:41,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 07:57:41,678 INFO L85 PathProgramCache]: Analyzing trace with hash 1414516411, now seen corresponding path program 2 times [2021-12-22 07:57:41,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 07:57:41,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851439167] [2021-12-22 07:57:41,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 07:57:41,679 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 07:57:41,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 07:57:41,746 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-22 07:57:41,746 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 07:57:41,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851439167] [2021-12-22 07:57:41,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851439167] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 07:57:41,747 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 07:57:41,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 07:57:41,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614824682] [2021-12-22 07:57:41,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 07:57:41,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 07:57:41,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 07:57:41,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 07:57:41,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 07:57:41,748 INFO L87 Difference]: Start difference. First operand 44 states and 55 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 07:57:41,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 07:57:41,796 INFO L93 Difference]: Finished difference Result 95 states and 126 transitions. [2021-12-22 07:57:41,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 07:57:41,797 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-12-22 07:57:41,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 07:57:41,798 INFO L225 Difference]: With dead ends: 95 [2021-12-22 07:57:41,798 INFO L226 Difference]: Without dead ends: 64 [2021-12-22 07:57:41,815 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 07:57:41,817 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 30 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 07:57:41,820 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 81 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 07:57:41,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-12-22 07:57:41,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 45. [2021-12-22 07:57:41,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.25) internal successors, (50), 40 states have internal predecessors, (50), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-22 07:57:41,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 56 transitions. [2021-12-22 07:57:41,835 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 56 transitions. Word has length 22 [2021-12-22 07:57:41,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 07:57:41,836 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 56 transitions. [2021-12-22 07:57:41,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 07:57:41,836 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 56 transitions. [2021-12-22 07:57:41,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-22 07:57:41,837 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 07:57:41,837 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 07:57:41,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 07:57:41,837 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 07:57:41,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 07:57:41,838 INFO L85 PathProgramCache]: Analyzing trace with hash -1079334847, now seen corresponding path program 1 times [2021-12-22 07:57:41,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 07:57:41,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922230149] [2021-12-22 07:57:41,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 07:57:41,841 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 07:57:41,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 07:57:41,915 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-22 07:57:41,916 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 07:57:41,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922230149] [2021-12-22 07:57:41,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922230149] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 07:57:41,918 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 07:57:41,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 07:57:41,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982986293] [2021-12-22 07:57:41,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 07:57:41,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 07:57:41,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 07:57:41,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 07:57:41,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 07:57:41,920 INFO L87 Difference]: Start difference. First operand 45 states and 56 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 07:57:41,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 07:57:41,953 INFO L93 Difference]: Finished difference Result 92 states and 121 transitions. [2021-12-22 07:57:41,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 07:57:41,953 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-12-22 07:57:41,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 07:57:41,954 INFO L225 Difference]: With dead ends: 92 [2021-12-22 07:57:41,954 INFO L226 Difference]: Without dead ends: 61 [2021-12-22 07:57:41,955 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 07:57:41,957 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 17 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 07:57:41,958 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 83 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 07:57:41,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-12-22 07:57:41,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 53. [2021-12-22 07:57:41,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.2708333333333333) internal successors, (61), 48 states have internal predecessors, (61), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-22 07:57:41,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 67 transitions. [2021-12-22 07:57:41,965 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 67 transitions. Word has length 25 [2021-12-22 07:57:41,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 07:57:41,966 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 67 transitions. [2021-12-22 07:57:41,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 07:57:41,966 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 67 transitions. [2021-12-22 07:57:41,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-22 07:57:41,966 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 07:57:41,967 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 07:57:41,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-22 07:57:41,967 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 07:57:41,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 07:57:41,967 INFO L85 PathProgramCache]: Analyzing trace with hash -581508620, now seen corresponding path program 1 times [2021-12-22 07:57:41,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 07:57:41,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748984480] [2021-12-22 07:57:41,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 07:57:41,968 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 07:57:41,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 07:57:42,029 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 07:57:42,030 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 07:57:42,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748984480] [2021-12-22 07:57:42,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748984480] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 07:57:42,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558941394] [2021-12-22 07:57:42,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 07:57:42,030 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 07:57:42,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 07:57:42,039 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 07:57:42,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-22 07:57:42,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 07:57:42,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-22 07:57:42,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 07:57:42,147 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 07:57:42,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 07:57:42,228 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 07:57:42,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558941394] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 07:57:42,229 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 07:57:42,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2021-12-22 07:57:42,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202647964] [2021-12-22 07:57:42,229 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 07:57:42,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-22 07:57:42,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 07:57:42,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-22 07:57:42,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-12-22 07:57:42,234 INFO L87 Difference]: Start difference. First operand 53 states and 67 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 07:57:42,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 07:57:42,267 INFO L93 Difference]: Finished difference Result 107 states and 140 transitions. [2021-12-22 07:57:42,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-22 07:57:42,274 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-12-22 07:57:42,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 07:57:42,275 INFO L225 Difference]: With dead ends: 107 [2021-12-22 07:57:42,275 INFO L226 Difference]: Without dead ends: 65 [2021-12-22 07:57:42,275 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-12-22 07:57:42,276 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 15 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 07:57:42,276 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 131 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 07:57:42,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-12-22 07:57:42,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-12-22 07:57:42,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 60 states have (on average 1.2166666666666666) internal successors, (73), 60 states have internal predecessors, (73), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-22 07:57:42,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 79 transitions. [2021-12-22 07:57:42,289 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 79 transitions. Word has length 26 [2021-12-22 07:57:42,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 07:57:42,289 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 79 transitions. [2021-12-22 07:57:42,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 07:57:42,290 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 79 transitions. [2021-12-22 07:57:42,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-22 07:57:42,290 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 07:57:42,290 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 07:57:42,307 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-22 07:57:42,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 07:57:42,491 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 07:57:42,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 07:57:42,492 INFO L85 PathProgramCache]: Analyzing trace with hash -772621952, now seen corresponding path program 2 times [2021-12-22 07:57:42,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 07:57:42,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710814773] [2021-12-22 07:57:42,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 07:57:42,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 07:57:42,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 07:57:42,592 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 07:57:42,592 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 07:57:42,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710814773] [2021-12-22 07:57:42,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710814773] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 07:57:42,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652086356] [2021-12-22 07:57:42,593 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 07:57:42,593 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 07:57:42,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 07:57:42,594 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 07:57:42,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-22 07:57:42,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-22 07:57:42,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 07:57:42,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-22 07:57:42,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 07:57:42,764 INFO L387 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 15 treesize of output 7 [2021-12-22 07:57:42,794 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-12-22 07:57:42,795 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 07:57:42,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652086356] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 07:57:42,795 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 07:57:42,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [13] total 19 [2021-12-22 07:57:42,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007223860] [2021-12-22 07:57:42,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 07:57:42,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-22 07:57:42,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 07:57:42,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-22 07:57:42,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2021-12-22 07:57:42,797 INFO L87 Difference]: Start difference. First operand 65 states and 79 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 07:57:42,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 07:57:42,872 INFO L93 Difference]: Finished difference Result 79 states and 95 transitions. [2021-12-22 07:57:42,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-22 07:57:42,873 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-12-22 07:57:42,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 07:57:42,874 INFO L225 Difference]: With dead ends: 79 [2021-12-22 07:57:42,874 INFO L226 Difference]: Without dead ends: 77 [2021-12-22 07:57:42,874 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2021-12-22 07:57:42,875 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 66 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 07:57:42,875 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 172 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 07:57:42,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-12-22 07:57:42,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 70. [2021-12-22 07:57:42,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 63 states have (on average 1.2063492063492063) internal successors, (76), 64 states have internal predecessors, (76), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-22 07:57:42,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 84 transitions. [2021-12-22 07:57:42,880 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 84 transitions. Word has length 38 [2021-12-22 07:57:42,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 07:57:42,881 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 84 transitions. [2021-12-22 07:57:42,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 07:57:42,881 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 84 transitions. [2021-12-22 07:57:42,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-22 07:57:42,882 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 07:57:42,882 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 07:57:42,902 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-22 07:57:43,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 07:57:43,105 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 07:57:43,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 07:57:43,105 INFO L85 PathProgramCache]: Analyzing trace with hash -602796711, now seen corresponding path program 1 times [2021-12-22 07:57:43,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 07:57:43,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372115001] [2021-12-22 07:57:43,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 07:57:43,106 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 07:57:43,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 07:57:43,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-22 07:57:43,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 07:57:43,213 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 2 proven. 100 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-22 07:57:43,213 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 07:57:43,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372115001] [2021-12-22 07:57:43,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372115001] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 07:57:43,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107737009] [2021-12-22 07:57:43,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 07:57:43,214 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 07:57:43,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 07:57:43,215 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 07:57:43,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-22 07:57:43,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 07:57:43,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-22 07:57:43,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 07:57:43,325 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-22 07:57:43,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 07:57:43,527 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 2 proven. 100 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-22 07:57:43,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107737009] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 07:57:43,528 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 07:57:43,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2021-12-22 07:57:43,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390036006] [2021-12-22 07:57:43,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 07:57:43,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-22 07:57:43,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 07:57:43,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-22 07:57:43,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-12-22 07:57:43,530 INFO L87 Difference]: Start difference. First operand 70 states and 84 transitions. Second operand has 25 states, 25 states have (on average 2.76) internal successors, (69), 25 states have internal predecessors, (69), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-22 07:57:43,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 07:57:43,583 INFO L93 Difference]: Finished difference Result 141 states and 180 transitions. [2021-12-22 07:57:43,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-22 07:57:43,584 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 25 states have internal predecessors, (69), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 46 [2021-12-22 07:57:43,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 07:57:43,586 INFO L225 Difference]: With dead ends: 141 [2021-12-22 07:57:43,586 INFO L226 Difference]: Without dead ends: 94 [2021-12-22 07:57:43,586 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-12-22 07:57:43,587 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 22 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 07:57:43,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 174 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 07:57:43,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-12-22 07:57:43,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2021-12-22 07:57:43,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 87 states have (on average 1.1494252873563218) internal successors, (100), 88 states have internal predecessors, (100), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-22 07:57:43,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 108 transitions. [2021-12-22 07:57:43,592 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 108 transitions. Word has length 46 [2021-12-22 07:57:43,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 07:57:43,593 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 108 transitions. [2021-12-22 07:57:43,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 25 states have internal predecessors, (69), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-22 07:57:43,593 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 108 transitions. [2021-12-22 07:57:43,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-22 07:57:43,594 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 07:57:43,594 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 07:57:43,613 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-22 07:57:43,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 07:57:43,811 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 07:57:43,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 07:57:43,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1736618383, now seen corresponding path program 2 times [2021-12-22 07:57:43,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 07:57:43,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675921077] [2021-12-22 07:57:43,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 07:57:43,812 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 07:57:43,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 07:57:44,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-22 07:57:44,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 07:57:44,071 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 2 proven. 484 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-22 07:57:44,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 07:57:44,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675921077] [2021-12-22 07:57:44,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675921077] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 07:57:44,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526596948] [2021-12-22 07:57:44,071 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 07:57:44,071 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 07:57:44,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 07:57:44,072 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 07:57:44,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-22 07:57:44,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 07:57:44,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 07:57:44,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-22 07:57:44,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 07:57:44,257 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-22 07:57:44,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 07:57:44,848 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 2 proven. 484 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-22 07:57:44,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526596948] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 07:57:44,849 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 07:57:44,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2021-12-22 07:57:44,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511169094] [2021-12-22 07:57:44,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 07:57:44,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-12-22 07:57:44,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 07:57:44,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-12-22 07:57:44,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-12-22 07:57:44,851 INFO L87 Difference]: Start difference. First operand 94 states and 108 transitions. Second operand has 49 states, 49 states have (on average 2.3877551020408165) internal successors, (117), 49 states have internal predecessors, (117), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-22 07:57:44,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 07:57:44,961 INFO L93 Difference]: Finished difference Result 189 states and 240 transitions. [2021-12-22 07:57:44,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-12-22 07:57:44,962 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.3877551020408165) internal successors, (117), 49 states have internal predecessors, (117), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 70 [2021-12-22 07:57:44,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 07:57:44,963 INFO L225 Difference]: With dead ends: 189 [2021-12-22 07:57:44,963 INFO L226 Difference]: Without dead ends: 142 [2021-12-22 07:57:44,964 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-12-22 07:57:44,964 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 46 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 07:57:44,964 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 260 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 07:57:44,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-12-22 07:57:44,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2021-12-22 07:57:44,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 135 states have (on average 1.0962962962962963) internal successors, (148), 136 states have internal predecessors, (148), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-22 07:57:44,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 156 transitions. [2021-12-22 07:57:44,972 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 156 transitions. Word has length 70 [2021-12-22 07:57:44,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 07:57:44,972 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 156 transitions. [2021-12-22 07:57:44,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.3877551020408165) internal successors, (117), 49 states have internal predecessors, (117), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-22 07:57:44,972 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 156 transitions. [2021-12-22 07:57:44,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-12-22 07:57:44,973 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 07:57:44,973 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 07:57:45,002 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-22 07:57:45,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 07:57:45,203 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 07:57:45,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 07:57:45,203 INFO L85 PathProgramCache]: Analyzing trace with hash 728266913, now seen corresponding path program 3 times [2021-12-22 07:57:45,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 07:57:45,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723036642] [2021-12-22 07:57:45,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 07:57:45,204 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 07:57:45,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 07:57:45,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-12-22 07:57:45,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 07:57:45,980 INFO L134 CoverageAnalysis]: Checked inductivity of 2121 backedges. 2 proven. 2116 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-22 07:57:45,980 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 07:57:45,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723036642] [2021-12-22 07:57:45,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723036642] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 07:57:45,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040053419] [2021-12-22 07:57:45,981 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-22 07:57:45,981 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 07:57:45,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 07:57:45,996 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 07:57:45,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-22 07:57:46,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-22 07:57:46,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 07:57:46,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 07:57:46,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 07:57:46,206 INFO L134 CoverageAnalysis]: Checked inductivity of 2121 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2120 trivial. 0 not checked. [2021-12-22 07:57:46,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 07:57:46,332 INFO L134 CoverageAnalysis]: Checked inductivity of 2121 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2118 trivial. 0 not checked. [2021-12-22 07:57:46,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040053419] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 07:57:46,333 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 07:57:46,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 4, 4] total 51 [2021-12-22 07:57:46,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231737427] [2021-12-22 07:57:46,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 07:57:46,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-12-22 07:57:46,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 07:57:46,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-12-22 07:57:46,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1180, Invalid=1370, Unknown=0, NotChecked=0, Total=2550 [2021-12-22 07:57:46,335 INFO L87 Difference]: Start difference. First operand 142 states and 156 transitions. Second operand has 51 states, 51 states have (on average 2.4901960784313726) internal successors, (127), 51 states have internal predecessors, (127), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-22 07:57:46,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 07:57:46,502 INFO L93 Difference]: Finished difference Result 218 states and 258 transitions. [2021-12-22 07:57:46,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-12-22 07:57:46,503 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.4901960784313726) internal successors, (127), 51 states have internal predecessors, (127), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 118 [2021-12-22 07:57:46,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 07:57:46,504 INFO L225 Difference]: With dead ends: 218 [2021-12-22 07:57:46,504 INFO L226 Difference]: Without dead ends: 171 [2021-12-22 07:57:46,505 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 235 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1184, Invalid=1468, Unknown=0, NotChecked=0, Total=2652 [2021-12-22 07:57:46,505 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 90 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 07:57:46,505 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 353 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 07:57:46,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-12-22 07:57:46,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 152. [2021-12-22 07:57:46,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 145 states have (on average 1.1172413793103448) internal successors, (162), 146 states have internal predecessors, (162), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-22 07:57:46,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 170 transitions. [2021-12-22 07:57:46,513 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 170 transitions. Word has length 118 [2021-12-22 07:57:46,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 07:57:46,514 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 170 transitions. [2021-12-22 07:57:46,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.4901960784313726) internal successors, (127), 51 states have internal predecessors, (127), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-22 07:57:46,514 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 170 transitions. [2021-12-22 07:57:46,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-12-22 07:57:46,515 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 07:57:46,515 INFO L514 BasicCegarLoop]: trace histogram [47, 47, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 07:57:46,534 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-22 07:57:46,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 07:57:46,732 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 07:57:46,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 07:57:46,732 INFO L85 PathProgramCache]: Analyzing trace with hash -870454239, now seen corresponding path program 1 times [2021-12-22 07:57:46,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 07:57:46,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742393950] [2021-12-22 07:57:46,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 07:57:46,732 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 07:57:46,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 07:57:47,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-12-22 07:57:47,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 07:57:47,539 INFO L134 CoverageAnalysis]: Checked inductivity of 2214 backedges. 2 proven. 2209 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-22 07:57:47,539 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 07:57:47,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742393950] [2021-12-22 07:57:47,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742393950] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 07:57:47,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037891746] [2021-12-22 07:57:47,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 07:57:47,540 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 07:57:47,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 07:57:47,541 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 07:57:47,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-22 07:57:47,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 07:57:47,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 49 conjunts are in the unsatisfiable core [2021-12-22 07:57:47,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 07:57:47,887 INFO L134 CoverageAnalysis]: Checked inductivity of 2214 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-22 07:57:47,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 07:57:49,994 INFO L134 CoverageAnalysis]: Checked inductivity of 2214 backedges. 2 proven. 2209 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-22 07:57:49,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037891746] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 07:57:49,995 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 07:57:49,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 99 [2021-12-22 07:57:49,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511726962] [2021-12-22 07:57:49,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 07:57:49,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2021-12-22 07:57:49,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 07:57:49,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2021-12-22 07:57:49,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2021-12-22 07:57:50,000 INFO L87 Difference]: Start difference. First operand 152 states and 170 transitions. Second operand has 99 states, 99 states have (on average 2.191919191919192) internal successors, (217), 99 states have internal predecessors, (217), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-22 07:57:50,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 07:57:50,241 INFO L93 Difference]: Finished difference Result 305 states and 389 transitions. [2021-12-22 07:57:50,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-12-22 07:57:50,242 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 2.191919191919192) internal successors, (217), 99 states have internal predecessors, (217), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 120 [2021-12-22 07:57:50,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 07:57:50,243 INFO L225 Difference]: With dead ends: 305 [2021-12-22 07:57:50,244 INFO L226 Difference]: Without dead ends: 250 [2021-12-22 07:57:50,246 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2021-12-22 07:57:50,246 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 96 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 07:57:50,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 303 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 07:57:50,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-12-22 07:57:50,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 250. [2021-12-22 07:57:50,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 243 states have (on average 1.0699588477366255) internal successors, (260), 244 states have internal predecessors, (260), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-22 07:57:50,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 268 transitions. [2021-12-22 07:57:50,261 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 268 transitions. Word has length 120 [2021-12-22 07:57:50,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 07:57:50,261 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 268 transitions. [2021-12-22 07:57:50,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 2.191919191919192) internal successors, (217), 99 states have internal predecessors, (217), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-22 07:57:50,262 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 268 transitions. [2021-12-22 07:57:50,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2021-12-22 07:57:50,264 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 07:57:50,264 INFO L514 BasicCegarLoop]: trace histogram [96, 96, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 07:57:50,283 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-22 07:57:50,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-22 07:57:50,481 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 07:57:50,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 07:57:50,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1106180221, now seen corresponding path program 2 times [2021-12-22 07:57:50,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 07:57:50,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257446029] [2021-12-22 07:57:50,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 07:57:50,482 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 07:57:50,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 07:57:52,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 206 [2021-12-22 07:57:52,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 07:57:52,641 INFO L134 CoverageAnalysis]: Checked inductivity of 9221 backedges. 2 proven. 9216 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-22 07:57:52,642 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 07:57:52,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257446029] [2021-12-22 07:57:52,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257446029] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 07:57:52,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105696876] [2021-12-22 07:57:52,642 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 07:57:52,642 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 07:57:52,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 07:57:52,643 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 07:57:52,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-22 07:57:52,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 07:57:52,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 07:57:52,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 965 conjuncts, 98 conjunts are in the unsatisfiable core [2021-12-22 07:57:52,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 07:57:53,137 INFO L134 CoverageAnalysis]: Checked inductivity of 9221 backedges. 0 proven. 9216 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-22 07:57:53,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 07:58:01,032 INFO L134 CoverageAnalysis]: Checked inductivity of 9221 backedges. 2 proven. 9216 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-22 07:58:01,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105696876] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 07:58:01,032 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 07:58:01,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99, 99] total 197 [2021-12-22 07:58:01,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110584149] [2021-12-22 07:58:01,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 07:58:01,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 197 states [2021-12-22 07:58:01,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 07:58:01,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 197 interpolants. [2021-12-22 07:58:01,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19306, Invalid=19306, Unknown=0, NotChecked=0, Total=38612 [2021-12-22 07:58:01,043 INFO L87 Difference]: Start difference. First operand 250 states and 268 transitions. Second operand has 197 states, 197 states have (on average 2.0964467005076144) internal successors, (413), 197 states have internal predecessors, (413), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-22 07:58:01,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 07:58:01,559 INFO L93 Difference]: Finished difference Result 501 states and 634 transitions. [2021-12-22 07:58:01,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 196 states. [2021-12-22 07:58:01,559 INFO L78 Accepts]: Start accepts. Automaton has has 197 states, 197 states have (on average 2.0964467005076144) internal successors, (413), 197 states have internal predecessors, (413), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 218 [2021-12-22 07:58:01,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 07:58:01,561 INFO L225 Difference]: With dead ends: 501 [2021-12-22 07:58:01,561 INFO L226 Difference]: Without dead ends: 446 [2021-12-22 07:58:01,563 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 535 GetRequests, 340 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=19306, Invalid=19306, Unknown=0, NotChecked=0, Total=38612 [2021-12-22 07:58:01,564 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 291 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 07:58:01,564 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [291 Valid, 174 Invalid, 497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 394 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-22 07:58:01,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-12-22 07:58:01,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 446. [2021-12-22 07:58:01,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 439 states have (on average 1.0387243735763099) internal successors, (456), 440 states have internal predecessors, (456), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-22 07:58:01,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 464 transitions. [2021-12-22 07:58:01,573 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 464 transitions. Word has length 218 [2021-12-22 07:58:01,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 07:58:01,574 INFO L470 AbstractCegarLoop]: Abstraction has 446 states and 464 transitions. [2021-12-22 07:58:01,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 197 states, 197 states have (on average 2.0964467005076144) internal successors, (413), 197 states have internal predecessors, (413), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-22 07:58:01,574 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 464 transitions. [2021-12-22 07:58:01,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 415 [2021-12-22 07:58:01,577 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 07:58:01,577 INFO L514 BasicCegarLoop]: trace histogram [194, 194, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 07:58:01,595 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-22 07:58:01,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 07:58:01,795 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 07:58:01,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 07:58:01,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1565186873, now seen corresponding path program 3 times [2021-12-22 07:58:01,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 07:58:01,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061762286] [2021-12-22 07:58:01,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 07:58:01,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 07:58:02,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 07:58:09,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 402 [2021-12-22 07:58:09,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 07:58:09,640 INFO L134 CoverageAnalysis]: Checked inductivity of 37641 backedges. 2 proven. 37636 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-22 07:58:09,640 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 07:58:09,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061762286] [2021-12-22 07:58:09,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061762286] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 07:58:09,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531073126] [2021-12-22 07:58:09,641 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-22 07:58:09,641 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 07:58:09,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 07:58:09,646 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 07:58:09,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-22 07:58:09,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-22 07:58:09,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 07:58:09,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-22 07:58:09,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 07:58:10,315 INFO L134 CoverageAnalysis]: Checked inductivity of 37641 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 37640 trivial. 0 not checked. [2021-12-22 07:58:10,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 07:58:10,843 INFO L134 CoverageAnalysis]: Checked inductivity of 37641 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 37638 trivial. 0 not checked. [2021-12-22 07:58:10,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531073126] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 07:58:10,843 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 07:58:10,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [197, 5, 5] total 203 [2021-12-22 07:58:10,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623686764] [2021-12-22 07:58:10,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 07:58:10,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 203 states [2021-12-22 07:58:10,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 07:58:10,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 203 interpolants. [2021-12-22 07:58:10,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19325, Invalid=21681, Unknown=0, NotChecked=0, Total=41006 [2021-12-22 07:58:10,849 INFO L87 Difference]: Start difference. First operand 446 states and 464 transitions. Second operand has 203 states, 203 states have (on average 2.1083743842364533) internal successors, (428), 203 states have internal predecessors, (428), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-22 07:58:19,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 07:58:19,800 INFO L93 Difference]: Finished difference Result 554 states and 618 transitions. [2021-12-22 07:58:19,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 206 states. [2021-12-22 07:58:19,801 INFO L78 Accepts]: Start accepts. Automaton has has 203 states, 203 states have (on average 2.1083743842364533) internal successors, (428), 203 states have internal predecessors, (428), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 414 [2021-12-22 07:58:19,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 07:58:19,804 INFO L225 Difference]: With dead ends: 554 [2021-12-22 07:58:19,804 INFO L226 Difference]: Without dead ends: 499 [2021-12-22 07:58:19,812 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1226 GetRequests, 824 SyntacticMatches, 0 SemanticMatches, 402 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21463 ImplicationChecksByTransitivity, 15.8s TimeCoverageRelationStatistics Valid=58179, Invalid=104633, Unknown=0, NotChecked=0, Total=162812 [2021-12-22 07:58:19,812 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 692 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 422 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 695 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 422 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 07:58:19,812 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [695 Valid, 248 Invalid, 929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [422 Valid, 507 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-22 07:58:19,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2021-12-22 07:58:19,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 477. [2021-12-22 07:58:19,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 469 states have (on average 1.0511727078891258) internal successors, (493), 470 states have internal predecessors, (493), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-22 07:58:19,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 503 transitions. [2021-12-22 07:58:19,826 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 503 transitions. Word has length 414 [2021-12-22 07:58:19,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 07:58:19,826 INFO L470 AbstractCegarLoop]: Abstraction has 477 states and 503 transitions. [2021-12-22 07:58:19,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 203 states, 203 states have (on average 2.1083743842364533) internal successors, (428), 203 states have internal predecessors, (428), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-22 07:58:19,827 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 503 transitions. [2021-12-22 07:58:19,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 426 [2021-12-22 07:58:19,830 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 07:58:19,830 INFO L514 BasicCegarLoop]: trace histogram [195, 195, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 07:58:19,853 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-22 07:58:20,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-22 07:58:20,044 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 07:58:20,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 07:58:20,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1055751507, now seen corresponding path program 4 times [2021-12-22 07:58:20,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 07:58:20,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041816283] [2021-12-22 07:58:20,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 07:58:20,045 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 07:58:20,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 07:58:29,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 413 [2021-12-22 07:58:29,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 07:58:29,414 INFO L134 CoverageAnalysis]: Checked inductivity of 38051 backedges. 2 proven. 38025 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-22 07:58:29,414 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 07:58:29,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041816283] [2021-12-22 07:58:29,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041816283] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 07:58:29,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751522337] [2021-12-22 07:58:29,415 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-22 07:58:29,415 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 07:58:29,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 07:58:29,428 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 07:58:29,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-22 07:58:29,786 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-22 07:58:29,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 07:58:29,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 1886 conjuncts, 197 conjunts are in the unsatisfiable core [2021-12-22 07:58:29,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 07:58:30,443 INFO L134 CoverageAnalysis]: Checked inductivity of 38051 backedges. 0 proven. 38025 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-22 07:58:30,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 07:58:53,449 INFO L134 CoverageAnalysis]: Checked inductivity of 38051 backedges. 2 proven. 38025 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-22 07:58:53,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751522337] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 07:58:53,450 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 07:58:53,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [198, 198, 198] total 395 [2021-12-22 07:58:53,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566675389] [2021-12-22 07:58:53,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 07:58:53,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 395 states [2021-12-22 07:58:53,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 07:58:53,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 395 interpolants. [2021-12-22 07:58:53,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77815, Invalid=77815, Unknown=0, NotChecked=0, Total=155630 [2021-12-22 07:58:53,484 INFO L87 Difference]: Start difference. First operand 477 states and 503 transitions. Second operand has 395 states, 395 states have (on average 2.0481012658227846) internal successors, (809), 395 states have internal predecessors, (809), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-22 07:58:55,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 07:58:55,669 INFO L93 Difference]: Finished difference Result 955 states and 1203 transitions. [2021-12-22 07:58:55,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 394 states. [2021-12-22 07:58:55,670 INFO L78 Accepts]: Start accepts. Automaton has has 395 states, 395 states have (on average 2.0481012658227846) internal successors, (809), 395 states have internal predecessors, (809), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 425 [2021-12-22 07:58:55,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 07:58:55,673 INFO L225 Difference]: With dead ends: 955 [2021-12-22 07:58:55,673 INFO L226 Difference]: Without dead ends: 871 [2021-12-22 07:58:55,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1048 GetRequests, 655 SyntacticMatches, 0 SemanticMatches, 393 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 31.3s TimeCoverageRelationStatistics Valid=77815, Invalid=77815, Unknown=0, NotChecked=0, Total=155630 [2021-12-22 07:58:55,680 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 588 mSDsluCounter, 516 mSDsCounter, 0 mSdLazyCounter, 799 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 588 SdHoareTripleChecker+Valid, 561 SdHoareTripleChecker+Invalid, 1003 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 799 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-22 07:58:55,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [588 Valid, 561 Invalid, 1003 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 799 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-22 07:58:55,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 871 states. [2021-12-22 07:58:55,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 871 to 871. [2021-12-22 07:58:55,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 871 states, 863 states have (on average 1.0278099652375434) internal successors, (887), 864 states have internal predecessors, (887), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-22 07:58:55,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 897 transitions. [2021-12-22 07:58:55,697 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 897 transitions. Word has length 425 [2021-12-22 07:58:55,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 07:58:55,697 INFO L470 AbstractCegarLoop]: Abstraction has 871 states and 897 transitions. [2021-12-22 07:58:55,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 395 states, 395 states have (on average 2.0481012658227846) internal successors, (809), 395 states have internal predecessors, (809), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-22 07:58:55,698 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 897 transitions. [2021-12-22 07:58:55,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 820 [2021-12-22 07:58:55,703 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 07:58:55,703 INFO L514 BasicCegarLoop]: trace histogram [392, 392, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 07:58:55,723 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0