./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops/sum04-1.i --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/loops/sum04-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a02f2d90df049b7a5c6a05d9dfbf37e8076efe74 ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 10:35:40,176 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-29 10:35:40,177 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-29 10:35:40,206 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-29 10:35:40,206 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-29 10:35:40,207 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-29 10:35:40,208 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-29 10:35:40,209 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-29 10:35:40,211 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-29 10:35:40,211 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-29 10:35:40,212 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-29 10:35:40,213 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-29 10:35:40,213 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-29 10:35:40,214 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-29 10:35:40,215 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-29 10:35:40,216 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-29 10:35:40,217 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-29 10:35:40,217 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-29 10:35:40,218 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-29 10:35:40,220 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-29 10:35:40,221 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-29 10:35:40,222 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-29 10:35:40,222 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-29 10:35:40,223 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-29 10:35:40,225 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-29 10:35:40,225 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-29 10:35:40,225 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-29 10:35:40,226 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-29 10:35:40,226 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-29 10:35:40,227 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-29 10:35:40,227 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-29 10:35:40,228 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-29 10:35:40,228 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-29 10:35:40,229 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-29 10:35:40,229 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-29 10:35:40,229 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-29 10:35:40,230 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-29 10:35:40,230 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-29 10:35:40,230 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-29 10:35:40,231 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-29 10:35:40,231 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-29 10:35:40,232 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-29 10:35:40,260 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-29 10:35:40,261 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-29 10:35:40,261 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-29 10:35:40,261 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-29 10:35:40,263 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-29 10:35:40,263 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-29 10:35:40,263 INFO L138 SettingsManager]: * Use SBE=true [2021-08-29 10:35:40,263 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-29 10:35:40,263 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-29 10:35:40,264 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-29 10:35:40,264 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-29 10:35:40,264 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-29 10:35:40,264 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-29 10:35:40,265 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-29 10:35:40,265 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-29 10:35:40,265 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-29 10:35:40,265 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-29 10:35:40,265 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-29 10:35:40,265 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-29 10:35:40,265 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-29 10:35:40,266 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-29 10:35:40,266 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-29 10:35:40,266 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-29 10:35:40,266 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-29 10:35:40,266 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-29 10:35:40,266 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-29 10:35:40,266 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-29 10:35:40,267 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-29 10:35:40,267 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-29 10:35:40,267 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-29 10:35:40,267 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a02f2d90df049b7a5c6a05d9dfbf37e8076efe74 [2021-08-29 10:35:40,492 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-29 10:35:40,512 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-29 10:35:40,514 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-29 10:35:40,516 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-29 10:35:40,516 INFO L275 PluginConnector]: CDTParser initialized [2021-08-29 10:35:40,519 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/sum04-1.i [2021-08-29 10:35:40,561 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e3e316ae/b1df03652cfd400a805fc56b17ecbebf/FLAG7ea65103b [2021-08-29 10:35:40,926 INFO L306 CDTParser]: Found 1 translation units. [2021-08-29 10:35:40,926 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/sum04-1.i [2021-08-29 10:35:40,931 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e3e316ae/b1df03652cfd400a805fc56b17ecbebf/FLAG7ea65103b [2021-08-29 10:35:40,942 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e3e316ae/b1df03652cfd400a805fc56b17ecbebf [2021-08-29 10:35:40,945 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-29 10:35:40,946 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-29 10:35:40,949 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-29 10:35:40,949 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-29 10:35:40,951 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-29 10:35:40,952 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 10:35:40" (1/1) ... [2021-08-29 10:35:40,953 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74997237 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:35:40, skipping insertion in model container [2021-08-29 10:35:40,953 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 10:35:40" (1/1) ... [2021-08-29 10:35:40,958 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-29 10:35:40,972 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-29 10:35:41,088 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/loops/sum04-1.i[808,821] [2021-08-29 10:35:41,095 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-29 10:35:41,102 INFO L203 MainTranslator]: Completed pre-run [2021-08-29 10:35:41,111 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/loops/sum04-1.i[808,821] [2021-08-29 10:35:41,114 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-29 10:35:41,123 INFO L208 MainTranslator]: Completed translation [2021-08-29 10:35:41,123 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:35:41 WrapperNode [2021-08-29 10:35:41,124 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-29 10:35:41,125 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-29 10:35:41,125 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-29 10:35:41,125 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-29 10:35:41,130 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:35:41" (1/1) ... [2021-08-29 10:35:41,136 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:35:41" (1/1) ... [2021-08-29 10:35:41,168 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-29 10:35:41,170 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-29 10:35:41,170 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-29 10:35:41,170 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-29 10:35:41,175 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:35:41" (1/1) ... [2021-08-29 10:35:41,175 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:35:41" (1/1) ... [2021-08-29 10:35:41,176 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:35:41" (1/1) ... [2021-08-29 10:35:41,176 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:35:41" (1/1) ... [2021-08-29 10:35:41,180 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:35:41" (1/1) ... [2021-08-29 10:35:41,183 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:35:41" (1/1) ... [2021-08-29 10:35:41,186 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:35:41" (1/1) ... [2021-08-29 10:35:41,188 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-29 10:35:41,189 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-29 10:35:41,189 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-29 10:35:41,189 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-29 10:35:41,190 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:35:41" (1/1) ... [2021-08-29 10:35:41,195 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-29 10:35:41,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 10:35:41,210 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 10:35:41,228 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 10:35:41,240 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-29 10:35:41,241 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-29 10:35:41,241 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-29 10:35:41,241 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-29 10:35:41,342 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-29 10:35:41,342 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-08-29 10:35:41,343 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 10:35:41 BoogieIcfgContainer [2021-08-29 10:35:41,343 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-29 10:35:41,344 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-29 10:35:41,345 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-29 10:35:41,346 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-29 10:35:41,347 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 10:35:40" (1/3) ... [2021-08-29 10:35:41,347 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@238988e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 10:35:41, skipping insertion in model container [2021-08-29 10:35:41,347 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 10:35:41" (2/3) ... [2021-08-29 10:35:41,347 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@238988e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 10:35:41, skipping insertion in model container [2021-08-29 10:35:41,347 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 10:35:41" (3/3) ... [2021-08-29 10:35:41,348 INFO L111 eAbstractionObserver]: Analyzing ICFG sum04-1.i [2021-08-29 10:35:41,351 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-29 10:35:41,352 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-29 10:35:41,379 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-29 10:35:41,384 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 10:35:41,384 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-08-29 10:35:41,393 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.5) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 10:35:41,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-08-29 10:35:41,396 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 10:35:41,397 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-08-29 10:35:41,397 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 10:35:41,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 10:35:41,401 INFO L82 PathProgramCache]: Analyzing trace with hash 889937703, now seen corresponding path program 1 times [2021-08-29 10:35:41,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 10:35:41,407 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987540907] [2021-08-29 10:35:41,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 10:35:41,408 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 10:35:41,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 10:35:41,535 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 10:35:41,536 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 10:35:41,536 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987540907] [2021-08-29 10:35:41,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987540907] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 10:35:41,537 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 10:35:41,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-29 10:35:41,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730670592] [2021-08-29 10:35:41,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-08-29 10:35:41,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 10:35:41,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-29 10:35:41,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-29 10:35:41,560 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.5) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 10:35:41,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 10:35:41,599 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2021-08-29 10:35:41,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-29 10:35:41,601 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-08-29 10:35:41,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 10:35:41,619 INFO L225 Difference]: With dead ends: 19 [2021-08-29 10:35:41,619 INFO L226 Difference]: Without dead ends: 9 [2021-08-29 10:35:41,621 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.05ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-29 10:35:41,624 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.95ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.17ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30.40ms IncrementalHoareTripleChecker+Time [2021-08-29 10:35:41,624 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 13 Unknown, 0 Unchecked, 0.17ms Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 30.40ms Time] [2021-08-29 10:35:41,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-08-29 10:35:41,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-08-29 10:35:41,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 10:35:41,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2021-08-29 10:35:41,673 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2021-08-29 10:35:41,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 10:35:41,674 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2021-08-29 10:35:41,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 10:35:41,674 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2021-08-29 10:35:41,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-08-29 10:35:41,674 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 10:35:41,674 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-08-29 10:35:41,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-29 10:35:41,675 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 10:35:41,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 10:35:41,676 INFO L82 PathProgramCache]: Analyzing trace with hash 889610002, now seen corresponding path program 1 times [2021-08-29 10:35:41,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 10:35:41,676 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937415849] [2021-08-29 10:35:41,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 10:35:41,676 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 10:35:41,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 10:35:41,725 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 10:35:41,726 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 10:35:41,726 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937415849] [2021-08-29 10:35:41,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937415849] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 10:35:41,726 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 10:35:41,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-29 10:35:41,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914400876] [2021-08-29 10:35:41,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-29 10:35:41,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 10:35:41,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-29 10:35:41,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-29 10:35:41,740 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 10:35:41,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 10:35:41,777 INFO L93 Difference]: Finished difference Result 19 states and 23 transitions. [2021-08-29 10:35:41,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-29 10:35:41,778 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-08-29 10:35:41,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 10:35:41,778 INFO L225 Difference]: With dead ends: 19 [2021-08-29 10:35:41,778 INFO L226 Difference]: Without dead ends: 12 [2021-08-29 10:35:41,778 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.15ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-29 10:35:41,779 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 2 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.36ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.33ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 33.75ms IncrementalHoareTripleChecker+Time [2021-08-29 10:35:41,780 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 0 Invalid, 20 Unknown, 0 Unchecked, 0.33ms Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 33.75ms Time] [2021-08-29 10:35:41,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-08-29 10:35:41,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2021-08-29 10:35:41,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 10:35:41,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2021-08-29 10:35:41,783 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 6 [2021-08-29 10:35:41,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 10:35:41,783 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2021-08-29 10:35:41,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 10:35:41,783 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2021-08-29 10:35:41,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-08-29 10:35:41,783 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 10:35:41,784 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 10:35:41,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-29 10:35:41,784 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 10:35:41,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 10:35:41,784 INFO L82 PathProgramCache]: Analyzing trace with hash -332619814, now seen corresponding path program 1 times [2021-08-29 10:35:41,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 10:35:41,785 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551152832] [2021-08-29 10:35:41,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 10:35:41,785 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 10:35:41,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 10:35:41,848 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 10:35:41,848 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 10:35:41,848 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551152832] [2021-08-29 10:35:41,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551152832] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 10:35:41,849 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576150821] [2021-08-29 10:35:41,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 10:35:41,849 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 10:35:41,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 10:35:41,853 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 10:35:41,855 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 10:35:41,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 10:35:41,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-29 10:35:41,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 10:35:41,940 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 10:35:41,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 10:35:41,987 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 10:35:41,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576150821] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 10:35:41,988 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 10:35:41,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-08-29 10:35:41,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139767304] [2021-08-29 10:35:41,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-29 10:35:41,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 10:35:41,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-29 10:35:41,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-08-29 10:35:41,989 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 10:35:42,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 10:35:42,037 INFO L93 Difference]: Finished difference Result 26 states and 33 transitions. [2021-08-29 10:35:42,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-29 10:35:42,038 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-08-29 10:35:42,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 10:35:42,038 INFO L225 Difference]: With dead ends: 26 [2021-08-29 10:35:42,039 INFO L226 Difference]: Without dead ends: 19 [2021-08-29 10:35:42,039 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 25.61ms TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-08-29 10:35:42,041 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 9 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.57ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.61ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 41.39ms IncrementalHoareTripleChecker+Time [2021-08-29 10:35:42,042 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 0 Invalid, 37 Unknown, 0 Unchecked, 0.61ms Time], IncrementalHoareTripleChecker [6 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 41.39ms Time] [2021-08-29 10:35:42,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-08-29 10:35:42,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-08-29 10:35:42,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 10:35:42,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-08-29 10:35:42,051 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 9 [2021-08-29 10:35:42,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 10:35:42,051 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-08-29 10:35:42,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 10:35:42,051 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-08-29 10:35:42,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-29 10:35:42,052 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 10:35:42,052 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 10:35:42,070 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-08-29 10:35:42,268 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 10:35:42,268 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 10:35:42,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 10:35:42,269 INFO L82 PathProgramCache]: Analyzing trace with hash -1967544752, now seen corresponding path program 1 times [2021-08-29 10:35:42,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 10:35:42,269 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345526754] [2021-08-29 10:35:42,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 10:35:42,269 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 10:35:42,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 10:35:42,364 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 10:35:42,364 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 10:35:42,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345526754] [2021-08-29 10:35:42,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345526754] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 10:35:42,365 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503607286] [2021-08-29 10:35:42,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 10:35:42,365 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 10:35:42,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 10:35:42,366 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 10:35:42,367 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 10:35:42,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 10:35:42,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-29 10:35:42,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 10:35:42,447 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 10:35:42,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 10:35:42,531 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 10:35:42,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503607286] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 10:35:42,532 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 10:35:42,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2021-08-29 10:35:42,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133125317] [2021-08-29 10:35:42,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-29 10:35:42,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 10:35:42,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-29 10:35:42,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-08-29 10:35:42,535 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 10:35:42,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 10:35:42,593 INFO L93 Difference]: Finished difference Result 40 states and 51 transitions. [2021-08-29 10:35:42,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-29 10:35:42,594 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-29 10:35:42,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 10:35:42,596 INFO L225 Difference]: With dead ends: 40 [2021-08-29 10:35:42,596 INFO L226 Difference]: Without dead ends: 31 [2021-08-29 10:35:42,599 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 36.91ms TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-08-29 10:35:42,602 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 27 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 33.43ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.95ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 42.33ms IncrementalHoareTripleChecker+Time [2021-08-29 10:35:42,603 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 0 Invalid, 64 Unknown, 0 Unchecked, 1.95ms Time], IncrementalHoareTripleChecker [10 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 42.33ms Time] [2021-08-29 10:35:42,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-08-29 10:35:42,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-08-29 10:35:42,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.2) internal successors, (36), 30 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 10:35:42,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2021-08-29 10:35:42,610 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 18 [2021-08-29 10:35:42,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 10:35:42,610 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2021-08-29 10:35:42,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 10:35:42,612 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2021-08-29 10:35:42,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-29 10:35:42,613 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 10:35:42,613 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 5, 3, 1, 1, 1, 1, 1, 1] [2021-08-29 10:35:42,635 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 10:35:42,829 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 10:35:42,829 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 10:35:42,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 10:35:42,830 INFO L82 PathProgramCache]: Analyzing trace with hash -233243184, now seen corresponding path program 2 times [2021-08-29 10:35:42,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 10:35:42,830 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330454662] [2021-08-29 10:35:42,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 10:35:42,830 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 10:35:42,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-29 10:35:42,842 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-29 10:35:42,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-29 10:35:42,873 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-29 10:35:42,874 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-08-29 10:35:42,875 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-08-29 10:35:42,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-29 10:35:42,880 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-29 10:35:42,896 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.08 10:35:42 BoogieIcfgContainer [2021-08-29 10:35:42,897 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-29 10:35:42,897 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-29 10:35:42,897 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-29 10:35:42,897 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-29 10:35:42,898 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 10:35:41" (3/4) ... [2021-08-29 10:35:42,899 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-08-29 10:35:42,943 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-29 10:35:42,946 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-29 10:35:42,947 INFO L158 Benchmark]: Toolchain (without parser) took 2000.59ms. Allocated memory was 62.9MB in the beginning and 77.6MB in the end (delta: 14.7MB). Free memory was 44.1MB in the beginning and 31.0MB in the end (delta: 13.1MB). Peak memory consumption was 27.7MB. Max. memory is 16.1GB. [2021-08-29 10:35:42,947 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 62.9MB. Free memory was 45.9MB in the beginning and 45.9MB in the end (delta: 44.1kB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-29 10:35:42,947 INFO L158 Benchmark]: CACSL2BoogieTranslator took 175.52ms. Allocated memory is still 62.9MB. Free memory was 44.0MB in the beginning and 34.5MB in the end (delta: 9.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-08-29 10:35:42,948 INFO L158 Benchmark]: Boogie Procedure Inliner took 43.69ms. Allocated memory is still 62.9MB. Free memory was 34.5MB in the beginning and 47.6MB in the end (delta: -13.1MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-08-29 10:35:42,949 INFO L158 Benchmark]: Boogie Preprocessor took 17.93ms. Allocated memory is still 62.9MB. Free memory was 47.6MB in the beginning and 46.6MB in the end (delta: 974.5kB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-29 10:35:42,949 INFO L158 Benchmark]: RCFGBuilder took 154.67ms. Allocated memory is still 62.9MB. Free memory was 46.6MB in the beginning and 38.6MB in the end (delta: 8.0MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-08-29 10:35:42,949 INFO L158 Benchmark]: TraceAbstraction took 1552.18ms. Allocated memory was 62.9MB in the beginning and 77.6MB in the end (delta: 14.7MB). Free memory was 38.2MB in the beginning and 33.6MB in the end (delta: 4.6MB). Peak memory consumption was 22.8MB. Max. memory is 16.1GB. [2021-08-29 10:35:42,949 INFO L158 Benchmark]: Witness Printer took 49.32ms. Allocated memory is still 77.6MB. Free memory was 33.6MB in the beginning and 31.0MB in the end (delta: 2.6MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-08-29 10:35:42,953 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 62.9MB. Free memory was 45.9MB in the beginning and 45.9MB in the end (delta: 44.1kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 175.52ms. Allocated memory is still 62.9MB. Free memory was 44.0MB in the beginning and 34.5MB in the end (delta: 9.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 43.69ms. Allocated memory is still 62.9MB. Free memory was 34.5MB in the beginning and 47.6MB in the end (delta: -13.1MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Preprocessor took 17.93ms. Allocated memory is still 62.9MB. Free memory was 47.6MB in the beginning and 46.6MB in the end (delta: 974.5kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 154.67ms. Allocated memory is still 62.9MB. Free memory was 46.6MB in the beginning and 38.6MB in the end (delta: 8.0MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * TraceAbstraction took 1552.18ms. Allocated memory was 62.9MB in the beginning and 77.6MB in the end (delta: 14.7MB). Free memory was 38.2MB in the beginning and 33.6MB in the end (delta: 4.6MB). Peak memory consumption was 22.8MB. Max. memory is 16.1GB. * Witness Printer took 49.32ms. Allocated memory is still 77.6MB. Free memory was 33.6MB in the beginning and 31.0MB in the end (delta: 2.6MB). Peak memory consumption was 4.2MB. 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: 16]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L23] int i, sn=0; [L24] i=1 [L24] COND TRUE i<=8 [L25] COND TRUE i<4 [L26] sn = sn + (2) [L24] i++ [L24] COND TRUE i<=8 [L25] COND TRUE i<4 [L26] sn = sn + (2) [L24] i++ [L24] COND TRUE i<=8 [L25] COND TRUE i<4 [L26] sn = sn + (2) [L24] i++ [L24] COND TRUE i<=8 [L25] COND FALSE !(i<4) [L24] i++ [L24] COND TRUE i<=8 [L25] COND FALSE !(i<4) [L24] i++ [L24] COND TRUE i<=8 [L25] COND FALSE !(i<4) [L24] i++ [L24] COND TRUE i<=8 [L25] COND FALSE !(i<4) [L24] i++ [L24] COND TRUE i<=8 [L25] COND FALSE !(i<4) [L24] i++ [L24] COND FALSE !(i<=8) [L15] COND TRUE !(cond) [L16] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1500.43ms, OverallIterations: 5, TraceHistogramMax: 8, EmptinessCheckTime: 7.43ms, AutomataDifference: 261.09ms, DeadEndRemovalTime: 0.00ms, HoareAnnotationTime: 0.00ms, InitialAbstractionConstructionTime: 6.26ms, PartialOrderReductionTime: 0.00ms, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 38 SdHoareTripleChecker+Valid, 147.87ms IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 38 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 99.32ms Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 28 mSDsCounter, 17 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 117 IncrementalHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 17 mSolverCounterUnsat, 0 mSDtfsCounter, 117 mSolverCounterSat, 3.05ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 66 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 65.71ms Time, 0.00ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred in iteration=4, InterpolantAutomatonStates: 21, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.00ms DumpTime, AutomataMinimizationStatistics: 40.19ms AutomataMinimizationTime, 4 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 16.42ms SsaConstructionTime, 110.82ms SatisfiabilityAnalysisTime, 432.83ms InterpolantComputationTime, 96 NumberOfCodeBlocks, 96 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 85 ConstructedInterpolants, 0 QuantifiedInterpolants, 189 SizeOfPredicates, 0 NumberOfNonLiveVariables, 102 ConjunctsInSsa, 9 ConjunctsInUnsatCore, 8 InterpolantComputations, 2 PerfectInterpolantSequences, 0/69 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 10:35:42,979 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...