./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-examples/standard_strcmp_ground.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/standard_strcmp_ground.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 c802cbda9e8bed6a313e86b45d5d1f15426dd1417288149156d2bae000d97c78 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 08:04:11,168 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 08:04:11,172 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 08:04:11,224 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 08:04:11,224 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 08:04:11,226 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 08:04:11,227 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 08:04:11,229 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 08:04:11,230 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 08:04:11,233 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 08:04:11,234 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 08:04:11,235 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 08:04:11,235 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 08:04:11,237 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 08:04:11,238 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 08:04:11,239 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 08:04:11,240 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 08:04:11,240 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 08:04:11,243 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 08:04:11,245 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 08:04:11,246 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 08:04:11,247 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 08:04:11,248 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 08:04:11,249 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 08:04:11,253 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 08:04:11,254 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 08:04:11,255 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 08:04:11,255 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 08:04:11,256 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 08:04:11,256 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 08:04:11,257 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 08:04:11,257 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 08:04:11,259 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 08:04:11,259 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 08:04:11,260 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 08:04:11,260 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 08:04:11,261 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 08:04:11,261 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 08:04:11,261 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 08:04:11,262 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 08:04:11,262 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 08:04:11,263 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 08:04:11,290 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 08:04:11,291 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 08:04:11,291 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 08:04:11,292 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 08:04:11,292 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 08:04:11,292 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 08:04:11,293 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 08:04:11,293 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 08:04:11,293 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 08:04:11,293 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 08:04:11,294 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 08:04:11,294 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 08:04:11,294 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 08:04:11,294 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 08:04:11,295 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 08:04:11,295 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 08:04:11,295 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 08:04:11,295 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 08:04:11,295 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 08:04:11,295 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 08:04:11,295 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 08:04:11,296 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 08:04:11,296 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 08:04:11,296 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 08:04:11,296 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 08:04:11,296 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 08:04:11,296 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 08:04:11,297 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 08:04:11,297 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 08:04:11,297 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 08:04:11,297 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 08:04:11,297 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 08:04:11,297 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 08:04:11,298 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 08:04:11,298 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c802cbda9e8bed6a313e86b45d5d1f15426dd1417288149156d2bae000d97c78 [2021-12-22 08:04:11,479 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 08:04:11,501 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 08:04:11,503 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 08:04:11,503 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 08:04:11,504 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 08:04:11,505 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_strcmp_ground.i [2021-12-22 08:04:11,557 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/18b0b0561/3dd707f8ecee493b8e32dfcbe7ecd411/FLAGe30673e6a [2021-12-22 08:04:11,900 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 08:04:11,900 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_strcmp_ground.i [2021-12-22 08:04:11,907 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/18b0b0561/3dd707f8ecee493b8e32dfcbe7ecd411/FLAGe30673e6a [2021-12-22 08:04:12,340 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/18b0b0561/3dd707f8ecee493b8e32dfcbe7ecd411 [2021-12-22 08:04:12,341 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 08:04:12,343 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 08:04:12,345 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 08:04:12,345 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 08:04:12,347 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 08:04:12,347 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:04:12" (1/1) ... [2021-12-22 08:04:12,348 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33f4a733 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:04:12, skipping insertion in model container [2021-12-22 08:04:12,348 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:04:12" (1/1) ... [2021-12-22 08:04:12,352 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 08:04:12,361 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 08:04:12,463 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/standard_strcmp_ground.i[815,828] [2021-12-22 08:04:12,481 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 08:04:12,486 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 08:04:12,500 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/standard_strcmp_ground.i[815,828] [2021-12-22 08:04:12,514 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 08:04:12,526 INFO L208 MainTranslator]: Completed translation [2021-12-22 08:04:12,526 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:04:12 WrapperNode [2021-12-22 08:04:12,527 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 08:04:12,528 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 08:04:12,528 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 08:04:12,528 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 08:04:12,532 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:04:12" (1/1) ... [2021-12-22 08:04:12,538 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:04:12" (1/1) ... [2021-12-22 08:04:12,553 INFO L137 Inliner]: procedures = 17, calls = 20, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 78 [2021-12-22 08:04:12,554 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 08:04:12,554 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 08:04:12,555 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 08:04:12,555 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 08:04:12,560 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:04:12" (1/1) ... [2021-12-22 08:04:12,560 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:04:12" (1/1) ... [2021-12-22 08:04:12,568 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:04:12" (1/1) ... [2021-12-22 08:04:12,569 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:04:12" (1/1) ... [2021-12-22 08:04:12,578 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:04:12" (1/1) ... [2021-12-22 08:04:12,581 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:04:12" (1/1) ... [2021-12-22 08:04:12,591 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:04:12" (1/1) ... [2021-12-22 08:04:12,592 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 08:04:12,593 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 08:04:12,593 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 08:04:12,593 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 08:04:12,594 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:04:12" (1/1) ... [2021-12-22 08:04:12,598 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 08:04:12,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 08:04:12,614 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 08:04:12,632 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 08:04:12,642 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 08:04:12,642 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 08:04:12,643 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-22 08:04:12,643 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-22 08:04:12,643 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 08:04:12,643 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 08:04:12,643 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-22 08:04:12,643 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-22 08:04:12,717 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 08:04:12,718 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 08:04:12,820 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 08:04:12,824 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 08:04:12,824 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-22 08:04:12,826 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:04:12 BoogieIcfgContainer [2021-12-22 08:04:12,826 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 08:04:12,827 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 08:04:12,827 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 08:04:12,829 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 08:04:12,829 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 08:04:12" (1/3) ... [2021-12-22 08:04:12,830 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@441c3fe0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:04:12, skipping insertion in model container [2021-12-22 08:04:12,830 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:04:12" (2/3) ... [2021-12-22 08:04:12,830 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@441c3fe0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:04:12, skipping insertion in model container [2021-12-22 08:04:12,830 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:04:12" (3/3) ... [2021-12-22 08:04:12,831 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_strcmp_ground.i [2021-12-22 08:04:12,834 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 08:04:12,834 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 08:04:12,861 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 08:04:12,865 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 08:04:12,865 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-22 08:04:12,874 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:04:12,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-22 08:04:12,879 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:04:12,879 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:04:12,880 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:04:12,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:04:12,886 INFO L85 PathProgramCache]: Analyzing trace with hash -380323295, now seen corresponding path program 1 times [2021-12-22 08:04:12,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:04:12,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287370368] [2021-12-22 08:04:12,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:04:12,893 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:04:12,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:04:13,028 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 08:04:13,028 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:04:13,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287370368] [2021-12-22 08:04:13,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287370368] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:04:13,030 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:04:13,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 08:04:13,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888425403] [2021-12-22 08:04:13,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:04:13,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 08:04:13,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:04:13,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 08:04:13,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 08:04:13,057 INFO L87 Difference]: Start difference. First operand has 20 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:04:13,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:04:13,083 INFO L93 Difference]: Finished difference Result 38 states and 54 transitions. [2021-12-22 08:04:13,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 08:04:13,087 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-22 08:04:13,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:04:13,091 INFO L225 Difference]: With dead ends: 38 [2021-12-22 08:04:13,091 INFO L226 Difference]: Without dead ends: 18 [2021-12-22 08:04:13,094 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 08:04:13,097 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 1 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 42 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 08:04:13,098 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 42 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 08:04:13,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-12-22 08:04:13,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2021-12-22 08:04:13,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:04:13,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2021-12-22 08:04:13,123 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 11 [2021-12-22 08:04:13,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:04:13,124 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2021-12-22 08:04:13,124 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:04:13,125 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2021-12-22 08:04:13,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-22 08:04:13,126 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:04:13,126 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:04:13,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 08:04:13,127 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:04:13,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:04:13,130 INFO L85 PathProgramCache]: Analyzing trace with hash 1385790102, now seen corresponding path program 1 times [2021-12-22 08:04:13,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:04:13,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694181907] [2021-12-22 08:04:13,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:04:13,131 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:04:13,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:04:13,189 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 08:04:13,189 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:04:13,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694181907] [2021-12-22 08:04:13,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694181907] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 08:04:13,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244814807] [2021-12-22 08:04:13,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:04:13,191 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:04:13,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 08:04:13,192 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 08:04:13,194 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 08:04:13,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:04:13,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 08:04:13,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 08:04:13,304 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 08:04:13,305 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 08:04:13,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244814807] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:04:13,305 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 08:04:13,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-12-22 08:04:13,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75288616] [2021-12-22 08:04:13,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:04:13,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 08:04:13,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:04:13,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 08:04:13,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-22 08:04:13,308 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:04:13,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:04:13,315 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2021-12-22 08:04:13,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 08:04:13,315 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-22 08:04:13,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:04:13,316 INFO L225 Difference]: With dead ends: 36 [2021-12-22 08:04:13,316 INFO L226 Difference]: Without dead ends: 27 [2021-12-22 08:04:13,316 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 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 08:04:13,317 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 10 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 32 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 08:04:13,317 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 32 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 08:04:13,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-12-22 08:04:13,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 18. [2021-12-22 08:04:13,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:04:13,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2021-12-22 08:04:13,320 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 13 [2021-12-22 08:04:13,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:04:13,321 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2021-12-22 08:04:13,321 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:04:13,321 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2021-12-22 08:04:13,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-22 08:04:13,322 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:04:13,322 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:04:13,353 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 08:04:13,535 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 08:04:13,536 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:04:13,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:04:13,537 INFO L85 PathProgramCache]: Analyzing trace with hash -1305944738, now seen corresponding path program 1 times [2021-12-22 08:04:13,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:04:13,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229720596] [2021-12-22 08:04:13,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:04:13,537 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:04:13,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:04:13,572 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 08:04:13,572 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:04:13,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229720596] [2021-12-22 08:04:13,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229720596] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 08:04:13,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75322182] [2021-12-22 08:04:13,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:04:13,573 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:04:13,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 08:04:13,575 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 08:04:13,576 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 08:04:13,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:04:13,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 08:04:13,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 08:04:13,665 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 08:04:13,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 08:04:13,698 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 08:04:13,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75322182] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 08:04:13,699 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 08:04:13,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-12-22 08:04:13,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975949492] [2021-12-22 08:04:13,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 08:04:13,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 08:04:13,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:04:13,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 08:04:13,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-22 08:04:13,701 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:04:13,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:04:13,728 INFO L93 Difference]: Finished difference Result 37 states and 45 transitions. [2021-12-22 08:04:13,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 08:04:13,731 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-22 08:04:13,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:04:13,732 INFO L225 Difference]: With dead ends: 37 [2021-12-22 08:04:13,732 INFO L226 Difference]: Without dead ends: 24 [2021-12-22 08:04:13,733 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 23 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 08:04:13,734 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 4 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 08:04:13,736 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 47 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 08:04:13,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-12-22 08:04:13,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-12-22 08:04:13,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:04:13,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-12-22 08:04:13,742 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 13 [2021-12-22 08:04:13,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:04:13,743 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-12-22 08:04:13,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:04:13,743 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-12-22 08:04:13,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-22 08:04:13,743 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:04:13,743 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:04:13,761 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 08:04:13,944 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 08:04:13,944 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:04:13,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:04:13,963 INFO L85 PathProgramCache]: Analyzing trace with hash -1315958376, now seen corresponding path program 2 times [2021-12-22 08:04:13,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:04:13,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897814014] [2021-12-22 08:04:13,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:04:13,966 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:04:14,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:04:14,068 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 08:04:14,069 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:04:14,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897814014] [2021-12-22 08:04:14,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897814014] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:04:14,069 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:04:14,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 08:04:14,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624781588] [2021-12-22 08:04:14,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:04:14,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 08:04:14,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:04:14,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 08:04:14,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 08:04:14,072 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:04:14,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:04:14,093 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2021-12-22 08:04:14,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 08:04:14,094 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-12-22 08:04:14,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:04:14,095 INFO L225 Difference]: With dead ends: 32 [2021-12-22 08:04:14,095 INFO L226 Difference]: Without dead ends: 24 [2021-12-22 08:04:14,096 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 08:04:14,097 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 1 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 08:04:14,098 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 49 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 08:04:14,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-12-22 08:04:14,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-12-22 08:04:14,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:04:14,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2021-12-22 08:04:14,106 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 19 [2021-12-22 08:04:14,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:04:14,106 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2021-12-22 08:04:14,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:04:14,107 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2021-12-22 08:04:14,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-22 08:04:14,108 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:04:14,108 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:04:14,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 08:04:14,109 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:04:14,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:04:14,109 INFO L85 PathProgramCache]: Analyzing trace with hash -1531242293, now seen corresponding path program 1 times [2021-12-22 08:04:14,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:04:14,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660488220] [2021-12-22 08:04:14,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:04:14,111 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:04:14,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:04:14,178 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-22 08:04:14,179 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:04:14,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660488220] [2021-12-22 08:04:14,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660488220] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 08:04:14,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579345332] [2021-12-22 08:04:14,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:04:14,179 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:04:14,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 08:04:14,184 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 08:04:14,188 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 08:04:14,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:04:14,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-22 08:04:14,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 08:04:14,335 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 08:04:14,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 08:04:14,435 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 08:04:14,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579345332] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 08:04:14,436 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 08:04:14,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2021-12-22 08:04:14,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444032440] [2021-12-22 08:04:14,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 08:04:14,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-22 08:04:14,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:04:14,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-22 08:04:14,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-12-22 08:04:14,438 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:04:14,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:04:14,480 INFO L93 Difference]: Finished difference Result 52 states and 62 transitions. [2021-12-22 08:04:14,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 08:04:14,482 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-12-22 08:04:14,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:04:14,482 INFO L225 Difference]: With dead ends: 52 [2021-12-22 08:04:14,482 INFO L226 Difference]: Without dead ends: 39 [2021-12-22 08:04:14,483 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-12-22 08:04:14,488 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 17 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 08:04:14,488 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 50 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 08:04:14,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-12-22 08:04:14,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2021-12-22 08:04:14,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 37 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:04:14,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2021-12-22 08:04:14,498 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 21 [2021-12-22 08:04:14,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:04:14,498 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2021-12-22 08:04:14,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:04:14,499 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2021-12-22 08:04:14,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-22 08:04:14,499 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:04:14,499 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:04:14,515 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-22 08:04:14,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:04:14,715 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:04:14,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:04:14,715 INFO L85 PathProgramCache]: Analyzing trace with hash -1505418246, now seen corresponding path program 2 times [2021-12-22 08:04:14,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:04:14,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165447442] [2021-12-22 08:04:14,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:04:14,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:04:14,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:04:14,856 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-22 08:04:14,856 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:04:14,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165447442] [2021-12-22 08:04:14,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165447442] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 08:04:14,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148723292] [2021-12-22 08:04:14,857 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 08:04:14,857 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:04:14,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 08:04:14,858 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 08:04:14,859 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 08:04:14,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 08:04:14,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 08:04:14,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-22 08:04:14,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 08:04:15,012 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-22 08:04:15,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 08:04:15,209 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-22 08:04:15,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148723292] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 08:04:15,210 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 08:04:15,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2021-12-22 08:04:15,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076872916] [2021-12-22 08:04:15,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 08:04:15,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-22 08:04:15,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:04:15,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-22 08:04:15,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-12-22 08:04:15,213 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:04:15,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:04:15,278 INFO L93 Difference]: Finished difference Result 77 states and 92 transitions. [2021-12-22 08:04:15,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-22 08:04:15,278 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-12-22 08:04:15,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:04:15,280 INFO L225 Difference]: With dead ends: 77 [2021-12-22 08:04:15,280 INFO L226 Difference]: Without dead ends: 62 [2021-12-22 08:04:15,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 58 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 08:04:15,281 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 22 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 08:04:15,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 72 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 08:04:15,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-12-22 08:04:15,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-12-22 08:04:15,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.0491803278688525) internal successors, (64), 61 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:04:15,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2021-12-22 08:04:15,291 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 35 [2021-12-22 08:04:15,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:04:15,292 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2021-12-22 08:04:15,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:04:15,292 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2021-12-22 08:04:15,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-22 08:04:15,295 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:04:15,295 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:04:15,313 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 08:04:15,513 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:04:15,513 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:04:15,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:04:15,513 INFO L85 PathProgramCache]: Analyzing trace with hash 1633133026, now seen corresponding path program 3 times [2021-12-22 08:04:15,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:04:15,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754134482] [2021-12-22 08:04:15,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:04:15,514 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:04:15,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:04:15,861 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-22 08:04:15,861 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:04:15,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754134482] [2021-12-22 08:04:15,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754134482] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 08:04:15,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472417382] [2021-12-22 08:04:15,862 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-22 08:04:15,862 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:04:15,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 08:04:15,863 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 08:04:15,864 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 08:04:15,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-22 08:04:15,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 08:04:15,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-22 08:04:15,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 08:04:16,033 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2021-12-22 08:04:16,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 08:04:16,113 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2021-12-22 08:04:16,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472417382] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 08:04:16,114 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 08:04:16,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 5, 5] total 31 [2021-12-22 08:04:16,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843182023] [2021-12-22 08:04:16,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 08:04:16,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-22 08:04:16,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:04:16,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-22 08:04:16,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=603, Unknown=0, NotChecked=0, Total=930 [2021-12-22 08:04:16,116 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand has 31 states, 31 states have (on average 2.3548387096774195) internal successors, (73), 31 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:04:16,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:04:16,183 INFO L93 Difference]: Finished difference Result 88 states and 96 transitions. [2021-12-22 08:04:16,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-22 08:04:16,184 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3548387096774195) internal successors, (73), 31 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-12-22 08:04:16,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:04:16,184 INFO L225 Difference]: With dead ends: 88 [2021-12-22 08:04:16,184 INFO L226 Difference]: Without dead ends: 73 [2021-12-22 08:04:16,185 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=327, Invalid=603, Unknown=0, NotChecked=0, Total=930 [2021-12-22 08:04:16,185 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 32 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 08:04:16,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 74 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 08:04:16,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-12-22 08:04:16,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2021-12-22 08:04:16,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.0422535211267605) internal successors, (74), 71 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:04:16,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2021-12-22 08:04:16,190 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 59 [2021-12-22 08:04:16,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:04:16,190 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2021-12-22 08:04:16,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.3548387096774195) internal successors, (73), 31 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:04:16,191 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2021-12-22 08:04:16,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-22 08:04:16,191 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:04:16,191 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:04:16,211 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 08:04:16,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:04:16,412 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:04:16,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:04:16,413 INFO L85 PathProgramCache]: Analyzing trace with hash -449713396, now seen corresponding path program 4 times [2021-12-22 08:04:16,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:04:16,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645310254] [2021-12-22 08:04:16,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:04:16,413 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:04:16,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:04:16,702 INFO L134 CoverageAnalysis]: Checked inductivity of 565 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-22 08:04:16,702 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:04:16,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645310254] [2021-12-22 08:04:16,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645310254] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 08:04:16,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040567778] [2021-12-22 08:04:16,703 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-22 08:04:16,703 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:04:16,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 08:04:16,704 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 08:04:16,706 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 08:04:16,831 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-22 08:04:16,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 08:04:16,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 534 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-22 08:04:16,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 08:04:16,951 INFO L134 CoverageAnalysis]: Checked inductivity of 565 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-22 08:04:16,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 08:04:17,584 INFO L134 CoverageAnalysis]: Checked inductivity of 565 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-22 08:04:17,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040567778] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 08:04:17,584 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 08:04:17,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 51 [2021-12-22 08:04:17,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791356915] [2021-12-22 08:04:17,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 08:04:17,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-12-22 08:04:17,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:04:17,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-12-22 08:04:17,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2021-12-22 08:04:17,587 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand has 51 states, 51 states have (on average 2.156862745098039) internal successors, (110), 51 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:04:17,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:04:17,708 INFO L93 Difference]: Finished difference Result 145 states and 173 transitions. [2021-12-22 08:04:17,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-12-22 08:04:17,708 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.156862745098039) internal successors, (110), 51 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-12-22 08:04:17,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:04:17,709 INFO L225 Difference]: With dead ends: 145 [2021-12-22 08:04:17,709 INFO L226 Difference]: Without dead ends: 122 [2021-12-22 08:04:17,710 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2021-12-22 08:04:17,710 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 48 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 08:04:17,710 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 72 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 08:04:17,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-12-22 08:04:17,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2021-12-22 08:04:17,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 1.024793388429752) internal successors, (124), 121 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:04:17,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 124 transitions. [2021-12-22 08:04:17,716 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 124 transitions. Word has length 69 [2021-12-22 08:04:17,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:04:17,716 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 124 transitions. [2021-12-22 08:04:17,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.156862745098039) internal successors, (110), 51 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:04:17,717 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 124 transitions. [2021-12-22 08:04:17,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-12-22 08:04:17,718 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:04:17,718 INFO L514 BasicCegarLoop]: trace histogram [48, 48, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:04:17,736 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 08:04:17,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:04:17,938 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:04:17,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:04:17,939 INFO L85 PathProgramCache]: Analyzing trace with hash -195914982, now seen corresponding path program 5 times [2021-12-22 08:04:17,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:04:17,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991467263] [2021-12-22 08:04:17,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:04:17,939 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:04:18,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:04:18,827 INFO L134 CoverageAnalysis]: Checked inductivity of 2340 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-22 08:04:18,827 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:04:18,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991467263] [2021-12-22 08:04:18,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991467263] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 08:04:18,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810702113] [2021-12-22 08:04:18,828 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-22 08:04:18,828 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:04:18,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 08:04:18,829 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 08:04:18,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process