./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/fibo_2calls_5-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5fbdf5bf 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/recursive-simple/fibo_2calls_5-2.c -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 23bbff91fb2bcbd238fb97db06c7d4983c05a850 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-wip.dd.seqcomp-5fbdf5b [2021-08-29 16:31:15,121 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-29 16:31:15,123 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-29 16:31:15,161 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-29 16:31:15,161 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-29 16:31:15,166 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-29 16:31:15,167 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-29 16:31:15,172 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-29 16:31:15,175 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-29 16:31:15,178 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-29 16:31:15,179 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-29 16:31:15,183 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-29 16:31:15,183 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-29 16:31:15,186 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-29 16:31:15,187 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-29 16:31:15,190 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-29 16:31:15,191 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-29 16:31:15,191 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-29 16:31:15,193 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-29 16:31:15,199 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-29 16:31:15,200 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-29 16:31:15,201 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-29 16:31:15,203 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-29 16:31:15,204 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-29 16:31:15,207 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-29 16:31:15,207 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-29 16:31:15,207 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-29 16:31:15,209 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-29 16:31:15,209 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-29 16:31:15,210 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-29 16:31:15,210 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-29 16:31:15,211 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-29 16:31:15,212 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-29 16:31:15,213 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-29 16:31:15,214 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-29 16:31:15,214 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-29 16:31:15,215 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-29 16:31:15,215 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-29 16:31:15,215 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-29 16:31:15,216 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-29 16:31:15,217 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-29 16:31:15,221 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-29 16:31:15,258 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-29 16:31:15,259 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-29 16:31:15,260 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-29 16:31:15,260 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-29 16:31:15,261 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-29 16:31:15,262 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-29 16:31:15,262 INFO L138 SettingsManager]: * Use SBE=true [2021-08-29 16:31:15,262 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-29 16:31:15,262 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-29 16:31:15,262 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-29 16:31:15,263 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-29 16:31:15,264 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-29 16:31:15,264 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-29 16:31:15,264 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-29 16:31:15,264 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-29 16:31:15,264 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-29 16:31:15,264 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-29 16:31:15,265 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-29 16:31:15,265 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-29 16:31:15,265 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-29 16:31:15,265 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-29 16:31:15,265 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-29 16:31:15,266 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-29 16:31:15,266 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-29 16:31:15,266 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-29 16:31:15,266 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-29 16:31:15,266 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-29 16:31:15,266 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-29 16:31:15,267 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-29 16:31:15,267 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-29 16:31:15,267 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 23bbff91fb2bcbd238fb97db06c7d4983c05a850 [2021-08-29 16:31:15,599 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-29 16:31:15,630 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-29 16:31:15,633 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-29 16:31:15,634 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-29 16:31:15,634 INFO L275 PluginConnector]: CDTParser initialized [2021-08-29 16:31:15,636 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/fibo_2calls_5-2.c [2021-08-29 16:31:15,696 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c9da23ba9/692084086ae7487db0993084a59b4ec6/FLAG02b9f4b3f [2021-08-29 16:31:16,024 INFO L306 CDTParser]: Found 1 translation units. [2021-08-29 16:31:16,025 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_2calls_5-2.c [2021-08-29 16:31:16,030 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c9da23ba9/692084086ae7487db0993084a59b4ec6/FLAG02b9f4b3f [2021-08-29 16:31:16,442 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c9da23ba9/692084086ae7487db0993084a59b4ec6 [2021-08-29 16:31:16,444 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-29 16:31:16,446 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-29 16:31:16,448 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-29 16:31:16,449 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-29 16:31:16,452 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-29 16:31:16,452 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 04:31:16" (1/1) ... [2021-08-29 16:31:16,454 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@725c1215 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 04:31:16, skipping insertion in model container [2021-08-29 16:31:16,454 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 04:31:16" (1/1) ... [2021-08-29 16:31:16,460 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-29 16:31:16,474 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-29 16:31:16,570 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_2calls_5-2.c[946,959] [2021-08-29 16:31:16,573 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-29 16:31:16,579 INFO L203 MainTranslator]: Completed pre-run [2021-08-29 16:31:16,593 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_2calls_5-2.c[946,959] [2021-08-29 16:31:16,594 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-29 16:31:16,603 INFO L208 MainTranslator]: Completed translation [2021-08-29 16:31:16,604 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 04:31:16 WrapperNode [2021-08-29 16:31:16,604 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-29 16:31:16,605 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-29 16:31:16,605 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-29 16:31:16,605 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-29 16:31:16,611 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 04:31:16" (1/1) ... [2021-08-29 16:31:16,621 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 04:31:16" (1/1) ... [2021-08-29 16:31:16,633 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-29 16:31:16,634 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-29 16:31:16,634 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-29 16:31:16,634 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-29 16:31:16,666 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 04:31:16" (1/1) ... [2021-08-29 16:31:16,667 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 04:31:16" (1/1) ... [2021-08-29 16:31:16,677 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 04:31:16" (1/1) ... [2021-08-29 16:31:16,678 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 04:31:16" (1/1) ... [2021-08-29 16:31:16,685 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 04:31:16" (1/1) ... [2021-08-29 16:31:16,688 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 04:31:16" (1/1) ... [2021-08-29 16:31:16,691 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 04:31:16" (1/1) ... [2021-08-29 16:31:16,692 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-29 16:31:16,693 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-29 16:31:16,694 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-29 16:31:16,694 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-29 16:31:16,695 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 04:31:16" (1/1) ... [2021-08-29 16:31:16,701 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-29 16:31:16,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 16:31:16,730 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) [2021-08-29 16:31:16,757 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 [2021-08-29 16:31:16,771 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-29 16:31:16,772 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2021-08-29 16:31:16,772 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2021-08-29 16:31:16,773 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-29 16:31:16,773 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2021-08-29 16:31:16,773 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2021-08-29 16:31:16,773 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-29 16:31:16,773 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-29 16:31:16,931 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-29 16:31:16,931 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-08-29 16:31:16,933 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 04:31:16 BoogieIcfgContainer [2021-08-29 16:31:16,933 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-29 16:31:16,935 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-29 16:31:16,935 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-29 16:31:16,937 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-29 16:31:16,938 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 04:31:16" (1/3) ... [2021-08-29 16:31:16,939 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35dfeb53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 04:31:16, skipping insertion in model container [2021-08-29 16:31:16,939 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 04:31:16" (2/3) ... [2021-08-29 16:31:16,939 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35dfeb53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 04:31:16, skipping insertion in model container [2021-08-29 16:31:16,940 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 04:31:16" (3/3) ... [2021-08-29 16:31:16,941 INFO L111 eAbstractionObserver]: Analyzing ICFG fibo_2calls_5-2.c [2021-08-29 16:31:16,949 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-29 16:31:16,949 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-29 16:31:16,997 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-29 16:31:17,007 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, mConcurrency=FINITE_AUTOMATA, 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 [2021-08-29 16:31:17,007 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-08-29 16:31:17,026 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-08-29 16:31:17,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-29 16:31:17,031 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 16:31:17,031 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 16:31:17,032 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 16:31:17,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 16:31:17,044 INFO L82 PathProgramCache]: Analyzing trace with hash 1123300790, now seen corresponding path program 1 times [2021-08-29 16:31:17,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 16:31:17,051 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358876556] [2021-08-29 16:31:17,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 16:31:17,052 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 16:31:17,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:31:17,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:31:17,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:31:17,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 16:31:17,360 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 16:31:17,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358876556] [2021-08-29 16:31:17,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358876556] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 16:31:17,361 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 16:31:17,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-29 16:31:17,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101884951] [2021-08-29 16:31:17,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-29 16:31:17,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 16:31:17,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-29 16:31:17,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-29 16:31:17,406 INFO L87 Difference]: Start difference. First operand has 29 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-29 16:31:17,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 16:31:17,544 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2021-08-29 16:31:17,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-29 16:31:17,547 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-08-29 16:31:17,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 16:31:17,554 INFO L225 Difference]: With dead ends: 43 [2021-08-29 16:31:17,554 INFO L226 Difference]: Without dead ends: 27 [2021-08-29 16:31:17,558 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 43.67ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-29 16:31:17,565 INFO L928 BasicCegarLoop]: 10 mSDtfsCounter, 4 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 83.69ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.74ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 111.74ms IncrementalHoareTripleChecker+Time [2021-08-29 16:31:17,567 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 40 Invalid, 99 Unknown, 0 Unchecked, 2.74ms Time], IncrementalHoareTripleChecker [0 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 111.74ms Time] [2021-08-29 16:31:17,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-08-29 16:31:17,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-08-29 16:31:17,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2021-08-29 16:31:17,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2021-08-29 16:31:17,610 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 10 [2021-08-29 16:31:17,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 16:31:17,611 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2021-08-29 16:31:17,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-29 16:31:17,611 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2021-08-29 16:31:17,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-29 16:31:17,617 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 16:31:17,617 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 16:31:17,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-29 16:31:17,618 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 16:31:17,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 16:31:17,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1177745932, now seen corresponding path program 1 times [2021-08-29 16:31:17,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 16:31:17,621 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258759429] [2021-08-29 16:31:17,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 16:31:17,622 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 16:31:17,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:31:17,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:31:17,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:31:17,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 16:31:17,697 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 16:31:17,697 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258759429] [2021-08-29 16:31:17,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258759429] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 16:31:17,697 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 16:31:17,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-29 16:31:17,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773914833] [2021-08-29 16:31:17,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-29 16:31:17,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 16:31:17,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-29 16:31:17,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-29 16:31:17,700 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-29 16:31:17,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 16:31:17,756 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2021-08-29 16:31:17,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-29 16:31:17,756 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-08-29 16:31:17,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 16:31:17,758 INFO L225 Difference]: With dead ends: 33 [2021-08-29 16:31:17,758 INFO L226 Difference]: Without dead ends: 29 [2021-08-29 16:31:17,758 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.70ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-29 16:31:17,759 INFO L928 BasicCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 36.38ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.12ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 46.48ms IncrementalHoareTripleChecker+Time [2021-08-29 16:31:17,760 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 86 Unknown, 0 Unchecked, 2.12ms Time], IncrementalHoareTripleChecker [0 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 46.48ms Time] [2021-08-29 16:31:17,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-08-29 16:31:17,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2021-08-29 16:31:17,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2021-08-29 16:31:17,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2021-08-29 16:31:17,767 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 11 [2021-08-29 16:31:17,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 16:31:17,768 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2021-08-29 16:31:17,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-29 16:31:17,768 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2021-08-29 16:31:17,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-29 16:31:17,769 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 16:31:17,769 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 16:31:17,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-29 16:31:17,770 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 16:31:17,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 16:31:17,771 INFO L82 PathProgramCache]: Analyzing trace with hash 2110588723, now seen corresponding path program 1 times [2021-08-29 16:31:17,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 16:31:17,771 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721055677] [2021-08-29 16:31:17,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 16:31:17,772 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 16:31:17,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:31:17,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:31:17,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:31:17,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-08-29 16:31:17,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:31:17,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-08-29 16:31:17,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:31:17,903 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-29 16:31:17,903 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 16:31:17,903 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721055677] [2021-08-29 16:31:17,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721055677] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 16:31:17,903 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095689640] [2021-08-29 16:31:17,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 16:31:17,904 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 16:31:17,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 16:31:17,917 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) [2021-08-29 16:31:17,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-29 16:31:18,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:31:18,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-29 16:31:18,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 16:31:18,150 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-29 16:31:18,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 16:31:18,444 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-29 16:31:18,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095689640] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 16:31:18,445 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 16:31:18,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 13 [2021-08-29 16:31:18,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864652327] [2021-08-29 16:31:18,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-29 16:31:18,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 16:31:18,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-29 16:31:18,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-08-29 16:31:18,451 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 13 states, 10 states have (on average 3.2) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) [2021-08-29 16:31:18,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 16:31:18,666 INFO L93 Difference]: Finished difference Result 55 states and 75 transitions. [2021-08-29 16:31:18,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-29 16:31:18,667 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 3.2) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) Word has length 23 [2021-08-29 16:31:18,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 16:31:18,668 INFO L225 Difference]: With dead ends: 55 [2021-08-29 16:31:18,668 INFO L226 Difference]: Without dead ends: 31 [2021-08-29 16:31:18,669 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 147.99ms TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-08-29 16:31:18,670 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 32 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 108.47ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.36ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 141.09ms IncrementalHoareTripleChecker+Time [2021-08-29 16:31:18,671 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 34 Invalid, 250 Unknown, 0 Unchecked, 5.36ms Time], IncrementalHoareTripleChecker [14 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 141.09ms Time] [2021-08-29 16:31:18,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-08-29 16:31:18,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2021-08-29 16:31:18,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 21 states have internal predecessors, (23), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2021-08-29 16:31:18,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2021-08-29 16:31:18,692 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 23 [2021-08-29 16:31:18,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 16:31:18,692 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2021-08-29 16:31:18,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 3.2) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) [2021-08-29 16:31:18,694 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2021-08-29 16:31:18,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-29 16:31:18,696 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 16:31:18,696 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 16:31:18,724 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-29 16:31:18,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 16:31:18,905 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 16:31:18,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 16:31:18,906 INFO L82 PathProgramCache]: Analyzing trace with hash 1277869167, now seen corresponding path program 1 times [2021-08-29 16:31:18,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 16:31:18,906 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938429204] [2021-08-29 16:31:18,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 16:31:18,907 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 16:31:18,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:31:18,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:31:18,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:31:19,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-08-29 16:31:19,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:31:19,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-08-29 16:31:19,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:31:19,054 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-29 16:31:19,054 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 16:31:19,055 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938429204] [2021-08-29 16:31:19,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938429204] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 16:31:19,055 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185227787] [2021-08-29 16:31:19,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 16:31:19,055 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 16:31:19,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 16:31:19,057 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) [2021-08-29 16:31:19,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-29 16:31:19,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:31:19,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-29 16:31:19,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 16:31:19,179 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-29 16:31:19,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 16:31:19,360 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-29 16:31:19,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185227787] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 16:31:19,361 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 16:31:19,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2021-08-29 16:31:19,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428394247] [2021-08-29 16:31:19,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-29 16:31:19,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 16:31:19,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-29 16:31:19,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-08-29 16:31:19,365 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 13 states, 11 states have (on average 2.909090909090909) internal successors, (32), 13 states have internal predecessors, (32), 7 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (7), 3 states have call predecessors, (7), 7 states have call successors, (7) [2021-08-29 16:31:19,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 16:31:19,543 INFO L93 Difference]: Finished difference Result 51 states and 71 transitions. [2021-08-29 16:31:19,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-29 16:31:19,544 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.909090909090909) internal successors, (32), 13 states have internal predecessors, (32), 7 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (7), 3 states have call predecessors, (7), 7 states have call successors, (7) Word has length 24 [2021-08-29 16:31:19,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 16:31:19,546 INFO L225 Difference]: With dead ends: 51 [2021-08-29 16:31:19,546 INFO L226 Difference]: Without dead ends: 47 [2021-08-29 16:31:19,547 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 66.07ms TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-08-29 16:31:19,548 INFO L928 BasicCegarLoop]: 7 mSDtfsCounter, 32 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 121.55ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.19ms SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 148.88ms IncrementalHoareTripleChecker+Time [2021-08-29 16:31:19,548 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 35 Invalid, 279 Unknown, 0 Unchecked, 3.19ms Time], IncrementalHoareTripleChecker [23 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 148.88ms Time] [2021-08-29 16:31:19,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-08-29 16:31:19,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2021-08-29 16:31:19,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 31 states have internal predecessors, (38), 9 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (15), 9 states have call predecessors, (15), 9 states have call successors, (15) [2021-08-29 16:31:19,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 62 transitions. [2021-08-29 16:31:19,557 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 62 transitions. Word has length 24 [2021-08-29 16:31:19,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 16:31:19,558 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 62 transitions. [2021-08-29 16:31:19,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.909090909090909) internal successors, (32), 13 states have internal predecessors, (32), 7 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (7), 3 states have call predecessors, (7), 7 states have call successors, (7) [2021-08-29 16:31:19,558 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 62 transitions. [2021-08-29 16:31:19,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-29 16:31:19,559 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 16:31:19,569 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 16:31:19,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-29 16:31:19,780 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,SelfDestructingSolverStorable3 [2021-08-29 16:31:19,781 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 16:31:19,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 16:31:19,782 INFO L82 PathProgramCache]: Analyzing trace with hash -2061621832, now seen corresponding path program 1 times [2021-08-29 16:31:19,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 16:31:19,782 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260078830] [2021-08-29 16:31:19,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 16:31:19,782 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 16:31:19,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:31:19,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:31:19,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:31:19,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-08-29 16:31:19,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:31:19,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-08-29 16:31:19,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:31:19,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-08-29 16:31:19,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:31:19,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-08-29 16:31:19,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:31:19,915 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-29 16:31:19,915 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 16:31:19,916 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260078830] [2021-08-29 16:31:19,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260078830] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 16:31:19,919 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511463467] [2021-08-29 16:31:19,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 16:31:19,919 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 16:31:19,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 16:31:19,921 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) [2021-08-29 16:31:19,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-29 16:31:19,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:31:19,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-29 16:31:19,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 16:31:20,088 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-29 16:31:20,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 16:31:20,429 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-29 16:31:20,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511463467] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 16:31:20,430 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 16:31:20,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 9] total 15 [2021-08-29 16:31:20,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933478823] [2021-08-29 16:31:20,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-29 16:31:20,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 16:31:20,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-29 16:31:20,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-08-29 16:31:20,435 INFO L87 Difference]: Start difference. First operand 45 states and 62 transitions. Second operand has 15 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 15 states have internal predecessors, (47), 11 states have call successors, (13), 1 states have call predecessors, (13), 5 states have return successors, (13), 3 states have call predecessors, (13), 11 states have call successors, (13) [2021-08-29 16:31:20,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 16:31:20,670 INFO L93 Difference]: Finished difference Result 105 states and 167 transitions. [2021-08-29 16:31:20,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-29 16:31:20,671 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 15 states have internal predecessors, (47), 11 states have call successors, (13), 1 states have call predecessors, (13), 5 states have return successors, (13), 3 states have call predecessors, (13), 11 states have call successors, (13) Word has length 36 [2021-08-29 16:31:20,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 16:31:20,673 INFO L225 Difference]: With dead ends: 105 [2021-08-29 16:31:20,673 INFO L226 Difference]: Without dead ends: 63 [2021-08-29 16:31:20,674 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 75 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 153.79ms TimeCoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-08-29 16:31:20,674 INFO L928 BasicCegarLoop]: 6 mSDtfsCounter, 65 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 117.02ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.52ms SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 154.78ms IncrementalHoareTripleChecker+Time [2021-08-29 16:31:20,675 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 29 Invalid, 309 Unknown, 0 Unchecked, 2.52ms Time], IncrementalHoareTripleChecker [50 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 154.78ms Time] [2021-08-29 16:31:20,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-08-29 16:31:20,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-08-29 16:31:20,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 41 states have (on average 1.2439024390243902) internal successors, (51), 44 states have internal predecessors, (51), 12 states have call successors, (12), 5 states have call predecessors, (12), 9 states have return successors, (29), 13 states have call predecessors, (29), 12 states have call successors, (29) [2021-08-29 16:31:20,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 92 transitions. [2021-08-29 16:31:20,685 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 92 transitions. Word has length 36 [2021-08-29 16:31:20,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 16:31:20,685 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 92 transitions. [2021-08-29 16:31:20,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 15 states have internal predecessors, (47), 11 states have call successors, (13), 1 states have call predecessors, (13), 5 states have return successors, (13), 3 states have call predecessors, (13), 11 states have call successors, (13) [2021-08-29 16:31:20,686 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 92 transitions. [2021-08-29 16:31:20,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-29 16:31:20,687 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 16:31:20,687 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 16:31:20,712 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-29 16:31:20,902 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 [2021-08-29 16:31:20,902 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 16:31:20,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 16:31:20,903 INFO L82 PathProgramCache]: Analyzing trace with hash 1167294498, now seen corresponding path program 1 times [2021-08-29 16:31:20,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 16:31:20,903 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590374166] [2021-08-29 16:31:20,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 16:31:20,903 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 16:31:20,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:31:20,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:31:20,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:31:20,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-08-29 16:31:20,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:31:20,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-08-29 16:31:20,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:31:21,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-08-29 16:31:21,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:31:21,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-08-29 16:31:21,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:31:21,013 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-08-29 16:31:21,013 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 16:31:21,013 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590374166] [2021-08-29 16:31:21,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590374166] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 16:31:21,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923692700] [2021-08-29 16:31:21,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 16:31:21,014 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 16:31:21,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 16:31:21,015 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) [2021-08-29 16:31:21,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-29 16:31:21,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:31:21,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-29 16:31:21,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 16:31:21,181 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-29 16:31:21,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 16:31:21,481 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-29 16:31:21,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923692700] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 16:31:21,482 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 16:31:21,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 18 [2021-08-29 16:31:21,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92303506] [2021-08-29 16:31:21,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-29 16:31:21,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 16:31:21,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-29 16:31:21,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-08-29 16:31:21,484 INFO L87 Difference]: Start difference. First operand 63 states and 92 transitions. Second operand has 18 states, 16 states have (on average 3.125) internal successors, (50), 18 states have internal predecessors, (50), 11 states have call successors, (13), 1 states have call predecessors, (13), 7 states have return successors, (13), 6 states have call predecessors, (13), 11 states have call successors, (13) [2021-08-29 16:31:21,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 16:31:21,902 INFO L93 Difference]: Finished difference Result 177 states and 321 transitions. [2021-08-29 16:31:21,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-29 16:31:21,903 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 3.125) internal successors, (50), 18 states have internal predecessors, (50), 11 states have call successors, (13), 1 states have call predecessors, (13), 7 states have return successors, (13), 6 states have call predecessors, (13), 11 states have call successors, (13) Word has length 37 [2021-08-29 16:31:21,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 16:31:21,906 INFO L225 Difference]: With dead ends: 177 [2021-08-29 16:31:21,906 INFO L226 Difference]: Without dead ends: 117 [2021-08-29 16:31:21,908 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 166.66ms TimeCoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2021-08-29 16:31:21,908 INFO L928 BasicCegarLoop]: 9 mSDtfsCounter, 60 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 615 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 241.67ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.48ms SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 322.52ms IncrementalHoareTripleChecker+Time [2021-08-29 16:31:21,909 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 63 Invalid, 688 Unknown, 0 Unchecked, 4.48ms Time], IncrementalHoareTripleChecker [73 Valid, 615 Invalid, 0 Unknown, 0 Unchecked, 322.52ms Time] [2021-08-29 16:31:21,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-08-29 16:31:21,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 103. [2021-08-29 16:31:21,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 66 states have (on average 1.2121212121212122) internal successors, (80), 69 states have internal predecessors, (80), 21 states have call successors, (21), 7 states have call predecessors, (21), 15 states have return successors, (65), 26 states have call predecessors, (65), 21 states have call successors, (65) [2021-08-29 16:31:21,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 166 transitions. [2021-08-29 16:31:21,926 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 166 transitions. Word has length 37 [2021-08-29 16:31:21,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 16:31:21,926 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 166 transitions. [2021-08-29 16:31:21,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 3.125) internal successors, (50), 18 states have internal predecessors, (50), 11 states have call successors, (13), 1 states have call predecessors, (13), 7 states have return successors, (13), 6 states have call predecessors, (13), 11 states have call successors, (13) [2021-08-29 16:31:21,927 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 166 transitions. [2021-08-29 16:31:21,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-08-29 16:31:21,930 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 16:31:21,930 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 16:31:21,958 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-29 16:31:22,153 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 [2021-08-29 16:31:22,154 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 16:31:22,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 16:31:22,154 INFO L82 PathProgramCache]: Analyzing trace with hash 384535367, now seen corresponding path program 1 times [2021-08-29 16:31:22,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 16:31:22,154 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915271162] [2021-08-29 16:31:22,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 16:31:22,155 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 16:31:22,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:31:22,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:31:22,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:31:22,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-08-29 16:31:22,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:31:22,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-08-29 16:31:22,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:31:22,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-08-29 16:31:22,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:31:22,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-08-29 16:31:22,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:31:22,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-08-29 16:31:22,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:31:22,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-08-29 16:31:22,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:31:22,287 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-08-29 16:31:22,287 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 16:31:22,287 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915271162] [2021-08-29 16:31:22,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915271162] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 16:31:22,288 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797995701] [2021-08-29 16:31:22,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 16:31:22,288 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 16:31:22,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 16:31:22,293 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) [2021-08-29 16:31:22,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-29 16:31:22,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:31:22,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-29 16:31:22,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 16:31:22,516 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-08-29 16:31:22,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 16:31:22,972 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-08-29 16:31:22,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797995701] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 16:31:22,972 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 16:31:22,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 11] total 19 [2021-08-29 16:31:22,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793149042] [2021-08-29 16:31:22,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-29 16:31:22,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 16:31:22,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-29 16:31:22,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-08-29 16:31:22,976 INFO L87 Difference]: Start difference. First operand 103 states and 166 transitions. Second operand has 19 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 19 states have internal predecessors, (59), 13 states have call successors, (15), 1 states have call predecessors, (15), 8 states have return successors, (17), 7 states have call predecessors, (17), 13 states have call successors, (17) [2021-08-29 16:31:23,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 16:31:23,388 INFO L93 Difference]: Finished difference Result 255 states and 495 transitions. [2021-08-29 16:31:23,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-29 16:31:23,389 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 19 states have internal predecessors, (59), 13 states have call successors, (15), 1 states have call predecessors, (15), 8 states have return successors, (17), 7 states have call predecessors, (17), 13 states have call successors, (17) Word has length 51 [2021-08-29 16:31:23,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 16:31:23,391 INFO L225 Difference]: With dead ends: 255 [2021-08-29 16:31:23,391 INFO L226 Difference]: Without dead ends: 155 [2021-08-29 16:31:23,393 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 113 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 210.81ms TimeCoverageRelationStatistics Valid=147, Invalid=609, Unknown=0, NotChecked=0, Total=756 [2021-08-29 16:31:23,393 INFO L928 BasicCegarLoop]: 9 mSDtfsCounter, 100 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 219.36ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.59ms SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 286.51ms IncrementalHoareTripleChecker+Time [2021-08-29 16:31:23,394 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 46 Invalid, 608 Unknown, 0 Unchecked, 15.59ms Time], IncrementalHoareTripleChecker [147 Valid, 461 Invalid, 0 Unknown, 0 Unchecked, 286.51ms Time] [2021-08-29 16:31:23,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-08-29 16:31:23,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 109. [2021-08-29 16:31:23,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 71 states have (on average 1.2253521126760563) internal successors, (87), 72 states have internal predecessors, (87), 24 states have call successors, (24), 9 states have call predecessors, (24), 13 states have return successors, (66), 27 states have call predecessors, (66), 24 states have call successors, (66) [2021-08-29 16:31:23,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 177 transitions. [2021-08-29 16:31:23,413 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 177 transitions. Word has length 51 [2021-08-29 16:31:23,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 16:31:23,413 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 177 transitions. [2021-08-29 16:31:23,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 19 states have internal predecessors, (59), 13 states have call successors, (15), 1 states have call predecessors, (15), 8 states have return successors, (17), 7 states have call predecessors, (17), 13 states have call successors, (17) [2021-08-29 16:31:23,413 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 177 transitions. [2021-08-29 16:31:23,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-08-29 16:31:23,416 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 16:31:23,416 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 16:31:23,443 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-29 16:31:23,630 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 [2021-08-29 16:31:23,630 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 16:31:23,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 16:31:23,631 INFO L82 PathProgramCache]: Analyzing trace with hash -1851863125, now seen corresponding path program 1 times [2021-08-29 16:31:23,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 16:31:23,631 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092430536] [2021-08-29 16:31:23,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 16:31:23,631 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 16:31:23,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:31:23,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:31:23,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:31:23,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-08-29 16:31:23,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:31:23,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-08-29 16:31:23,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:31:23,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-08-29 16:31:23,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:31:23,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-08-29 16:31:23,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:31:23,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-08-29 16:31:23,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:31:23,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-08-29 16:31:23,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:31:23,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-08-29 16:31:23,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:31:23,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-08-29 16:31:23,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:31:23,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-08-29 16:31:23,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:31:23,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-08-29 16:31:23,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:31:23,824 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 39 proven. 38 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-08-29 16:31:23,824 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 16:31:23,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092430536] [2021-08-29 16:31:23,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092430536] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 16:31:23,825 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208760917] [2021-08-29 16:31:23,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 16:31:23,825 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 16:31:23,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 16:31:23,827 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) [2021-08-29 16:31:23,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-29 16:31:23,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:31:23,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-29 16:31:23,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 16:31:24,079 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 31 proven. 31 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-08-29 16:31:24,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 16:31:24,480 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 31 proven. 33 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-08-29 16:31:24,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208760917] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 16:31:24,480 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 16:31:24,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 9] total 19 [2021-08-29 16:31:24,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918276613] [2021-08-29 16:31:24,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-29 16:31:24,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 16:31:24,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-29 16:31:24,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-08-29 16:31:24,486 INFO L87 Difference]: Start difference. First operand 109 states and 177 transitions. Second operand has 19 states, 18 states have (on average 3.5) internal successors, (63), 19 states have internal predecessors, (63), 12 states have call successors, (18), 1 states have call predecessors, (18), 7 states have return successors, (21), 11 states have call predecessors, (21), 12 states have call successors, (21) [2021-08-29 16:31:24,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 16:31:24,860 INFO L93 Difference]: Finished difference Result 241 states and 471 transitions. [2021-08-29 16:31:24,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-29 16:31:24,864 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.5) internal successors, (63), 19 states have internal predecessors, (63), 12 states have call successors, (18), 1 states have call predecessors, (18), 7 states have return successors, (21), 11 states have call predecessors, (21), 12 states have call successors, (21) Word has length 79 [2021-08-29 16:31:24,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 16:31:24,865 INFO L225 Difference]: With dead ends: 241 [2021-08-29 16:31:24,865 INFO L226 Difference]: Without dead ends: 120 [2021-08-29 16:31:24,867 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 172 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 171.64ms TimeCoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2021-08-29 16:31:24,867 INFO L928 BasicCegarLoop]: 9 mSDtfsCounter, 81 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 528 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 234.13ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.16ms SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 286.81ms IncrementalHoareTripleChecker+Time [2021-08-29 16:31:24,867 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 55 Invalid, 613 Unknown, 0 Unchecked, 5.16ms Time], IncrementalHoareTripleChecker [85 Valid, 528 Invalid, 0 Unknown, 0 Unchecked, 286.81ms Time] [2021-08-29 16:31:24,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-08-29 16:31:24,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 98. [2021-08-29 16:31:24,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 66 states have (on average 1.2121212121212122) internal successors, (80), 67 states have internal predecessors, (80), 19 states have call successors, (19), 10 states have call predecessors, (19), 12 states have return successors, (52), 20 states have call predecessors, (52), 19 states have call successors, (52) [2021-08-29 16:31:24,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 151 transitions. [2021-08-29 16:31:24,880 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 151 transitions. Word has length 79 [2021-08-29 16:31:24,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 16:31:24,880 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 151 transitions. [2021-08-29 16:31:24,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.5) internal successors, (63), 19 states have internal predecessors, (63), 12 states have call successors, (18), 1 states have call predecessors, (18), 7 states have return successors, (21), 11 states have call predecessors, (21), 12 states have call successors, (21) [2021-08-29 16:31:24,881 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 151 transitions. [2021-08-29 16:31:24,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-08-29 16:31:24,883 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 16:31:24,883 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 8, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 16:31:24,909 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-29 16:31:25,100 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 [2021-08-29 16:31:25,101 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 16:31:25,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 16:31:25,101 INFO L82 PathProgramCache]: Analyzing trace with hash 502211684, now seen corresponding path program 2 times [2021-08-29 16:31:25,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 16:31:25,101 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415582442] [2021-08-29 16:31:25,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 16:31:25,102 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 16:31:25,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:31:25,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:31:25,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:31:25,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-08-29 16:31:25,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:31:25,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-08-29 16:31:25,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:31:25,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-08-29 16:31:25,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:31:25,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-08-29 16:31:25,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:31:25,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-08-29 16:31:25,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:31:25,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-08-29 16:31:25,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:31:25,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-08-29 16:31:25,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:31:25,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-08-29 16:31:25,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:31:25,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-08-29 16:31:25,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:31:25,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-08-29 16:31:25,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:31:25,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-08-29 16:31:25,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:31:25,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-08-29 16:31:25,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:31:25,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-08-29 16:31:25,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:31:25,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-08-29 16:31:25,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:31:25,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-08-29 16:31:25,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:31:25,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-08-29 16:31:25,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:31:25,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-08-29 16:31:25,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:31:25,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-08-29 16:31:25,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:31:25,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-08-29 16:31:25,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:31:25,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-08-29 16:31:25,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:31:25,482 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 140 proven. 160 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-08-29 16:31:25,483 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 16:31:25,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415582442] [2021-08-29 16:31:25,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415582442] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 16:31:25,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680531383] [2021-08-29 16:31:25,483 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-29 16:31:25,483 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 16:31:25,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 16:31:25,485 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) [2021-08-29 16:31:25,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-29 16:31:25,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-29 16:31:25,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 16:31:25,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-29 16:31:25,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 16:31:25,921 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 82 proven. 133 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2021-08-29 16:31:25,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 16:31:26,961 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 82 proven. 141 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2021-08-29 16:31:26,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680531383] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 16:31:26,962 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 16:31:26,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 10, 13] total 32 [2021-08-29 16:31:26,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978640210] [2021-08-29 16:31:26,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-29 16:31:26,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 16:31:26,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-29 16:31:26,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=851, Unknown=0, NotChecked=0, Total=992 [2021-08-29 16:31:26,966 INFO L87 Difference]: Start difference. First operand 98 states and 151 transitions. Second operand has 32 states, 31 states have (on average 2.870967741935484) internal successors, (89), 32 states have internal predecessors, (89), 20 states have call successors, (26), 1 states have call predecessors, (26), 14 states have return successors, (33), 20 states have call predecessors, (33), 20 states have call successors, (33) [2021-08-29 16:31:27,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 16:31:27,778 INFO L93 Difference]: Finished difference Result 230 states and 432 transitions. [2021-08-29 16:31:27,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-29 16:31:27,779 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.870967741935484) internal successors, (89), 32 states have internal predecessors, (89), 20 states have call successors, (26), 1 states have call predecessors, (26), 14 states have return successors, (33), 20 states have call predecessors, (33), 20 states have call successors, (33) Word has length 148 [2021-08-29 16:31:27,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 16:31:27,781 INFO L225 Difference]: With dead ends: 230 [2021-08-29 16:31:27,781 INFO L226 Difference]: Without dead ends: 114 [2021-08-29 16:31:27,782 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 325 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 436.01ms TimeCoverageRelationStatistics Valid=357, Invalid=1899, Unknown=0, NotChecked=0, Total=2256 [2021-08-29 16:31:27,783 INFO L928 BasicCegarLoop]: 12 mSDtfsCounter, 206 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 982 mSolverCounterSat, 258 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 451.11ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 1240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.05ms SdHoareTripleChecker+Time, 258 IncrementalHoareTripleChecker+Valid, 982 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 585.64ms IncrementalHoareTripleChecker+Time [2021-08-29 16:31:27,783 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 96 Invalid, 1240 Unknown, 0 Unchecked, 6.05ms Time], IncrementalHoareTripleChecker [258 Valid, 982 Invalid, 0 Unknown, 0 Unchecked, 585.64ms Time] [2021-08-29 16:31:27,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-08-29 16:31:27,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 96. [2021-08-29 16:31:27,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 66 states have (on average 1.2424242424242424) internal successors, (82), 67 states have internal predecessors, (82), 17 states have call successors, (17), 11 states have call predecessors, (17), 12 states have return successors, (36), 17 states have call predecessors, (36), 17 states have call successors, (36) [2021-08-29 16:31:27,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 135 transitions. [2021-08-29 16:31:27,804 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 135 transitions. Word has length 148 [2021-08-29 16:31:27,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 16:31:27,804 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 135 transitions. [2021-08-29 16:31:27,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.870967741935484) internal successors, (89), 32 states have internal predecessors, (89), 20 states have call successors, (26), 1 states have call predecessors, (26), 14 states have return successors, (33), 20 states have call predecessors, (33), 20 states have call successors, (33) [2021-08-29 16:31:27,805 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 135 transitions. [2021-08-29 16:31:27,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-08-29 16:31:27,807 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 16:31:27,807 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 16:31:27,835 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-29 16:31:28,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 16:31:28,020 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 16:31:28,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 16:31:28,021 INFO L82 PathProgramCache]: Analyzing trace with hash 882144864, now seen corresponding path program 1 times [2021-08-29 16:31:28,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 16:31:28,021 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925164993] [2021-08-29 16:31:28,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 16:31:28,021 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 16:31:28,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:31:28,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:31:28,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:31:28,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-08-29 16:31:28,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:31:28,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-08-29 16:31:28,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:31:28,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-08-29 16:31:28,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:31:28,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-08-29 16:31:28,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:31:28,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-08-29 16:31:28,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:31:28,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-08-29 16:31:28,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:31:28,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-08-29 16:31:28,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:31:28,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-08-29 16:31:28,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:31:28,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-08-29 16:31:28,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:31:28,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-08-29 16:31:28,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:31:28,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-08-29 16:31:28,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:31:28,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-08-29 16:31:28,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:31:28,228 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 79 proven. 22 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2021-08-29 16:31:28,228 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 16:31:28,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925164993] [2021-08-29 16:31:28,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925164993] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 16:31:28,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88176162] [2021-08-29 16:31:28,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 16:31:28,229 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 16:31:28,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 16:31:28,230 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-29 16:31:28,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-29 16:31:28,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:31:28,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-29 16:31:28,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 16:31:28,535 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 58 proven. 15 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2021-08-29 16:31:28,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 16:31:28,950 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 58 proven. 17 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-08-29 16:31:28,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88176162] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 16:31:28,951 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 16:31:28,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 9] total 19 [2021-08-29 16:31:28,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265122022] [2021-08-29 16:31:28,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-29 16:31:28,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 16:31:28,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-29 16:31:28,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-08-29 16:31:28,952 INFO L87 Difference]: Start difference. First operand 96 states and 135 transitions. Second operand has 19 states, 18 states have (on average 3.5) internal successors, (63), 19 states have internal predecessors, (63), 11 states have call successors, (18), 1 states have call predecessors, (18), 7 states have return successors, (21), 12 states have call predecessors, (21), 11 states have call successors, (21) [2021-08-29 16:31:29,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 16:31:29,246 INFO L93 Difference]: Finished difference Result 196 states and 283 transitions. [2021-08-29 16:31:29,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-29 16:31:29,247 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.5) internal successors, (63), 19 states have internal predecessors, (63), 11 states have call successors, (18), 1 states have call predecessors, (18), 7 states have return successors, (21), 12 states have call predecessors, (21), 11 states have call successors, (21) Word has length 92 [2021-08-29 16:31:29,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 16:31:29,248 INFO L225 Difference]: With dead ends: 196 [2021-08-29 16:31:29,248 INFO L226 Difference]: Without dead ends: 109 [2021-08-29 16:31:29,249 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 201 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 168.43ms TimeCoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2021-08-29 16:31:29,249 INFO L928 BasicCegarLoop]: 7 mSDtfsCounter, 56 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 187.08ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.72ms SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 233.25ms IncrementalHoareTripleChecker+Time [2021-08-29 16:31:29,250 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 50 Invalid, 548 Unknown, 0 Unchecked, 2.72ms Time], IncrementalHoareTripleChecker [41 Valid, 507 Invalid, 0 Unknown, 0 Unchecked, 233.25ms Time] [2021-08-29 16:31:29,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-08-29 16:31:29,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 103. [2021-08-29 16:31:29,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 72 states have (on average 1.2222222222222223) internal successors, (88), 71 states have internal predecessors, (88), 18 states have call successors, (18), 13 states have call predecessors, (18), 12 states have return successors, (35), 18 states have call predecessors, (35), 18 states have call successors, (35) [2021-08-29 16:31:29,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 141 transitions. [2021-08-29 16:31:29,258 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 141 transitions. Word has length 92 [2021-08-29 16:31:29,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 16:31:29,259 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 141 transitions. [2021-08-29 16:31:29,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.5) internal successors, (63), 19 states have internal predecessors, (63), 11 states have call successors, (18), 1 states have call predecessors, (18), 7 states have return successors, (21), 12 states have call predecessors, (21), 11 states have call successors, (21) [2021-08-29 16:31:29,259 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 141 transitions. [2021-08-29 16:31:29,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-08-29 16:31:29,271 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 16:31:29,271 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 16:31:29,292 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-29 16:31:29,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-08-29 16:31:29,473 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 16:31:29,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 16:31:29,473 INFO L82 PathProgramCache]: Analyzing trace with hash -574358487, now seen corresponding path program 2 times [2021-08-29 16:31:29,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 16:31:29,474 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428265227] [2021-08-29 16:31:29,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 16:31:29,474 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 16:31:29,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:31:29,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:31:29,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:31:29,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-08-29 16:31:29,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:31:29,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-08-29 16:31:29,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:31:29,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-08-29 16:31:29,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:31:29,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-08-29 16:31:29,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:31:29,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-08-29 16:31:29,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:31:29,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-08-29 16:31:29,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:31:29,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-08-29 16:31:29,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:31:29,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-08-29 16:31:29,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:31:29,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-08-29 16:31:29,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:31:29,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-08-29 16:31:29,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:31:29,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-08-29 16:31:29,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:31:29,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-08-29 16:31:29,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:31:29,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-08-29 16:31:29,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:31:29,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-08-29 16:31:29,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:31:29,668 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 58 proven. 98 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-08-29 16:31:29,669 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 16:31:29,669 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428265227] [2021-08-29 16:31:29,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428265227] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 16:31:29,669 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851975327] [2021-08-29 16:31:29,669 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-29 16:31:29,669 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 16:31:29,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 16:31:29,670 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-29 16:31:29,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-29 16:31:29,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-29 16:31:29,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 16:31:29,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-29 16:31:29,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 16:31:29,994 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 55 proven. 61 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2021-08-29 16:31:29,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 16:31:30,688 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 57 proven. 63 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2021-08-29 16:31:30,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851975327] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 16:31:30,689 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 16:31:30,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 11] total 24 [2021-08-29 16:31:30,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562994709] [2021-08-29 16:31:30,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-29 16:31:30,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 16:31:30,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-29 16:31:30,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-08-29 16:31:30,691 INFO L87 Difference]: Start difference. First operand 103 states and 141 transitions. Second operand has 24 states, 23 states have (on average 3.347826086956522) internal successors, (77), 24 states have internal predecessors, (77), 15 states have call successors, (22), 1 states have call predecessors, (22), 10 states have return successors, (27), 15 states have call predecessors, (27), 15 states have call successors, (27) [2021-08-29 16:31:31,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 16:31:31,005 INFO L93 Difference]: Finished difference Result 206 states and 292 transitions. [2021-08-29 16:31:31,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-29 16:31:31,006 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 3.347826086956522) internal successors, (77), 24 states have internal predecessors, (77), 15 states have call successors, (22), 1 states have call predecessors, (22), 10 states have return successors, (27), 15 states have call predecessors, (27), 15 states have call successors, (27) Word has length 107 [2021-08-29 16:31:31,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 16:31:31,007 INFO L225 Difference]: With dead ends: 206 [2021-08-29 16:31:31,007 INFO L226 Difference]: Without dead ends: 113 [2021-08-29 16:31:31,008 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 234 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 243.09ms TimeCoverageRelationStatistics Valid=167, Invalid=825, Unknown=0, NotChecked=0, Total=992 [2021-08-29 16:31:31,009 INFO L928 BasicCegarLoop]: 6 mSDtfsCounter, 62 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 174.89ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.27ms SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 215.45ms IncrementalHoareTripleChecker+Time [2021-08-29 16:31:31,009 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 39 Invalid, 512 Unknown, 0 Unchecked, 2.27ms Time], IncrementalHoareTripleChecker [54 Valid, 458 Invalid, 0 Unknown, 0 Unchecked, 215.45ms Time] [2021-08-29 16:31:31,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-08-29 16:31:31,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 100. [2021-08-29 16:31:31,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 70 states have (on average 1.2285714285714286) internal successors, (86), 69 states have internal predecessors, (86), 18 states have call successors, (18), 13 states have call predecessors, (18), 11 states have return successors, (31), 17 states have call predecessors, (31), 18 states have call successors, (31) [2021-08-29 16:31:31,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 135 transitions. [2021-08-29 16:31:31,016 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 135 transitions. Word has length 107 [2021-08-29 16:31:31,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 16:31:31,016 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 135 transitions. [2021-08-29 16:31:31,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 3.347826086956522) internal successors, (77), 24 states have internal predecessors, (77), 15 states have call successors, (22), 1 states have call predecessors, (22), 10 states have return successors, (27), 15 states have call predecessors, (27), 15 states have call successors, (27) [2021-08-29 16:31:31,017 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 135 transitions. [2021-08-29 16:31:31,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-08-29 16:31:31,018 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 16:31:31,018 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 16:31:31,051 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-29 16:31:31,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 16:31:31,242 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 16:31:31,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 16:31:31,242 INFO L82 PathProgramCache]: Analyzing trace with hash 2118534433, now seen corresponding path program 3 times [2021-08-29 16:31:31,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 16:31:31,242 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274991979] [2021-08-29 16:31:31,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 16:31:31,242 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 16:31:31,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-29 16:31:31,258 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-29 16:31:31,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-29 16:31:31,303 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-29 16:31:31,303 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-08-29 16:31:31,304 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-08-29 16:31:31,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-08-29 16:31:31,311 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-29 16:31:31,372 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.08 04:31:31 BoogieIcfgContainer [2021-08-29 16:31:31,373 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-29 16:31:31,373 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-29 16:31:31,374 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-29 16:31:31,374 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-29 16:31:31,374 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 04:31:16" (3/4) ... [2021-08-29 16:31:31,376 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-08-29 16:31:31,447 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-29 16:31:31,447 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-29 16:31:31,448 INFO L158 Benchmark]: Toolchain (without parser) took 15001.94ms. Allocated memory was 69.2MB in the beginning and 121.6MB in the end (delta: 52.4MB). Free memory was 50.7MB in the beginning and 81.8MB in the end (delta: -31.1MB). Peak memory consumption was 19.7MB. Max. memory is 16.1GB. [2021-08-29 16:31:31,448 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 69.2MB. Free memory was 52.2MB in the beginning and 52.2MB in the end (delta: 51.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-29 16:31:31,449 INFO L158 Benchmark]: CACSL2BoogieTranslator took 155.87ms. Allocated memory is still 69.2MB. Free memory was 50.4MB in the beginning and 41.0MB in the end (delta: 9.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-08-29 16:31:31,449 INFO L158 Benchmark]: Boogie Procedure Inliner took 28.15ms. Allocated memory is still 69.2MB. Free memory was 41.0MB in the beginning and 53.8MB in the end (delta: -12.8MB). Peak memory consumption was 4.8MB. Max. memory is 16.1GB. [2021-08-29 16:31:31,449 INFO L158 Benchmark]: Boogie Preprocessor took 58.95ms. Allocated memory is still 69.2MB. Free memory was 53.8MB in the beginning and 52.9MB in the end (delta: 971.8kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-08-29 16:31:31,450 INFO L158 Benchmark]: RCFGBuilder took 240.12ms. Allocated memory is still 69.2MB. Free memory was 52.7MB in the beginning and 44.1MB in the end (delta: 8.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-08-29 16:31:31,450 INFO L158 Benchmark]: TraceAbstraction took 14437.95ms. Allocated memory was 69.2MB in the beginning and 121.6MB in the end (delta: 52.4MB). Free memory was 43.7MB in the beginning and 88.0MB in the end (delta: -44.4MB). Peak memory consumption was 8.7MB. Max. memory is 16.1GB. [2021-08-29 16:31:31,450 INFO L158 Benchmark]: Witness Printer took 73.81ms. Allocated memory is still 121.6MB. Free memory was 88.0MB in the beginning and 81.8MB in the end (delta: 6.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-08-29 16:31:31,452 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 69.2MB. Free memory was 52.2MB in the beginning and 52.2MB in the end (delta: 51.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 155.87ms. Allocated memory is still 69.2MB. Free memory was 50.4MB in the beginning and 41.0MB in the end (delta: 9.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 28.15ms. Allocated memory is still 69.2MB. Free memory was 41.0MB in the beginning and 53.8MB in the end (delta: -12.8MB). Peak memory consumption was 4.8MB. Max. memory is 16.1GB. * Boogie Preprocessor took 58.95ms. Allocated memory is still 69.2MB. Free memory was 53.8MB in the beginning and 52.9MB in the end (delta: 971.8kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 240.12ms. Allocated memory is still 69.2MB. Free memory was 52.7MB in the beginning and 44.1MB in the end (delta: 8.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 14437.95ms. Allocated memory was 69.2MB in the beginning and 121.6MB in the end (delta: 52.4MB). Free memory was 43.7MB in the beginning and 88.0MB in the end (delta: -44.4MB). Peak memory consumption was 8.7MB. Max. memory is 16.1GB. * Witness Printer took 73.81ms. Allocated memory is still 121.6MB. Free memory was 88.0MB in the beginning and 81.8MB in the end (delta: 6.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.00ms ErrorAutomatonConstructionTimeTotal, 0.00ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.00ms ErrorAutomatonConstructionTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 41]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L38] int x = 5; [L39] CALL, EXPR fibo1(x) VAL [\old(n)=5] [L10] COND FALSE !(n < 1) VAL [\old(n)=5, n=5] [L12] COND FALSE !(n == 1) VAL [\old(n)=5, n=5] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=4] [L20] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L22] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L25] CALL, EXPR fibo1(n-1) VAL [\old(n)=3] [L10] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L12] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=2] [L20] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L22] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L25] CALL, EXPR fibo1(n-1) VAL [\old(n)=1] [L10] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L12] COND TRUE n == 1 [L13] return 1; VAL [\old(n)=1, \result=1, n=1] [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=2, fibo1(n-1)=1, n=2] [L25] CALL, EXPR fibo1(n-2) VAL [\old(n)=0] [L10] COND TRUE n < 1 [L11] return 0; VAL [\old(n)=0, \result=0, n=0] [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=2, fibo1(n-1)=1, fibo1(n-2)=0, n=2] [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=3, fibo2(n-1)=1, n=3] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=1] [L20] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L22] COND TRUE n == 1 [L23] return 1; VAL [\old(n)=1, \result=1, n=1] [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=3, fibo2(n-1)=1, fibo2(n-2)=1, n=3] [L15] return fibo2(n-1) + fibo2(n-2); [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=4, fibo1(n-1)=2, n=4] [L25] CALL, EXPR fibo1(n-2) VAL [\old(n)=2] [L10] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L12] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L20] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L22] COND TRUE n == 1 [L23] return 1; VAL [\old(n)=1, \result=1, n=1] [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=2, fibo2(n-1)=1, n=2] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L20] COND TRUE n < 1 [L21] return 0; VAL [\old(n)=0, \result=0, n=0] [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L15] return fibo2(n-1) + fibo2(n-2); [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=4, fibo1(n-1)=2, fibo1(n-2)=1, n=4] [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=5, fibo2(n-1)=3, n=5] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=3] [L20] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L22] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L25] CALL, EXPR fibo1(n-1) VAL [\old(n)=2] [L10] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L12] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L20] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L22] COND TRUE n == 1 [L23] return 1; VAL [\old(n)=1, \result=1, n=1] [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=2, fibo2(n-1)=1, n=2] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L20] COND TRUE n < 1 [L21] return 0; VAL [\old(n)=0, \result=0, n=0] [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L15] return fibo2(n-1) + fibo2(n-2); [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=3, fibo1(n-1)=1, n=3] [L25] CALL, EXPR fibo1(n-2) VAL [\old(n)=1] [L10] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L12] COND TRUE n == 1 [L13] return 1; VAL [\old(n)=1, \result=1, n=1] [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=3, fibo1(n-1)=1, fibo1(n-2)=1, n=3] [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=5, fibo2(n-1)=3, fibo2(n-2)=2, n=5] [L15] return fibo2(n-1) + fibo2(n-2); [L39] RET, EXPR fibo1(x) [L39] int result = fibo1(x); [L40] COND TRUE result == 5 [L41] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 14313.86ms, OverallIterations: 12, TraceHistogramMax: 11, EmptinessCheckTime: 47.07ms, AutomataDifference: 3582.73ms, DeadEndRemovalTime: 0.00ms, HoareAnnotationTime: 0.00ms, InitialAbstractionConstructionTime: 11.85ms, PartialOrderReductionTime: 0.00ms, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 767 SdHoareTripleChecker+Valid, 2533.15ms IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 698 mSDsluCounter, 535 SdHoareTripleChecker+Invalid, 1975.34ms Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1793 mSDsCounter, 745 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 4487 IncrementalHoareTripleChecker+Invalid, 5232 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 745 mSolverCounterUnsat, 92 mSDtfsCounter, 4487 mSolverCounterSat, 52.19ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1543 GetRequests, 1300 SyntacticMatches, 17 SemanticMatches, 226 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1319 ImplicationChecksByTransitivity, 1819.87ms Time, 0.00ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=109occurred in iteration=7, InterpolantAutomatonStates: 169, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.00ms DumpTime, AutomataMinimizationStatistics: 154.42ms AutomataMinimizationTime, 11 MinimizatonAttempts, 125 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 115.09ms SsaConstructionTime, 369.62ms SatisfiabilityAnalysisTime, 7547.91ms InterpolantComputationTime, 1321 NumberOfCodeBlocks, 1321 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 1783 ConstructedInterpolants, 0 QuantifiedInterpolants, 3499 SizeOfPredicates, 29 NumberOfNonLiveVariables, 1593 ConjunctsInSsa, 76 ConjunctsInUnsatCore, 29 InterpolantComputations, 2 PerfectInterpolantSequences, 2771/3702 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-08-29 16:31:31,503 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...