./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/sum_2x3-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8d31f386 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/sum_2x3-1.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 af73c85b6bc44056cb1add2a2f8e6bd5309c70a2 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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.multireach-323-8d31f38 [2021-07-05 10:12:05,034 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-05 10:12:05,037 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-05 10:12:05,076 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-07-05 10:12:05,076 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-07-05 10:12:05,079 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-07-05 10:12:05,080 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-07-05 10:12:05,085 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-07-05 10:12:05,094 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-07-05 10:12:05,098 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-07-05 10:12:05,099 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-07-05 10:12:05,100 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-07-05 10:12:05,100 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-07-05 10:12:05,103 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-07-05 10:12:05,104 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-07-05 10:12:05,105 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-07-05 10:12:05,107 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-07-05 10:12:05,108 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-07-05 10:12:05,110 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-07-05 10:12:05,115 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-07-05 10:12:05,116 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-07-05 10:12:05,117 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-07-05 10:12:05,119 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-07-05 10:12:05,120 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-07-05 10:12:05,126 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-07-05 10:12:05,126 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-07-05 10:12:05,126 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-07-05 10:12:05,128 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-07-05 10:12:05,128 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-07-05 10:12:05,129 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-07-05 10:12:05,129 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-07-05 10:12:05,130 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-07-05 10:12:05,132 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-07-05 10:12:05,132 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-07-05 10:12:05,133 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-07-05 10:12:05,133 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-07-05 10:12:05,134 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-07-05 10:12:05,134 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-07-05 10:12:05,135 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-07-05 10:12:05,136 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-07-05 10:12:05,137 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-07-05 10:12:05,138 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-07-05 10:12:05,172 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-05 10:12:05,173 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-05 10:12:05,175 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-05 10:12:05,175 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-05 10:12:05,175 INFO L138 SettingsManager]: * Use SBE=true [2021-07-05 10:12:05,176 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-05 10:12:05,176 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-05 10:12:05,177 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-05 10:12:05,177 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-05 10:12:05,177 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-05 10:12:05,178 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-05 10:12:05,178 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-05 10:12:05,179 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-05 10:12:05,179 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-05 10:12:05,179 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-05 10:12:05,179 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-05 10:12:05,179 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-05 10:12:05,180 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-05 10:12:05,180 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-05 10:12:05,180 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-05 10:12:05,181 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-05 10:12:05,181 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-05 10:12:05,181 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-05 10:12:05,181 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-05 10:12:05,181 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-05 10:12:05,182 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-05 10:12:05,182 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-05 10:12:05,182 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-07-05 10:12:05,182 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> af73c85b6bc44056cb1add2a2f8e6bd5309c70a2 [2021-07-05 10:12:05,494 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-05 10:12:05,515 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-05 10:12:05,517 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-05 10:12:05,518 INFO L271 PluginConnector]: Initializing CDTParser... [2021-07-05 10:12:05,519 INFO L275 PluginConnector]: CDTParser initialized [2021-07-05 10:12:05,520 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/sum_2x3-1.c [2021-07-05 10:12:05,578 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a1462fc96/bdc1c669e1aa4270b2db060c7d9a536b/FLAG05c6951e8 [2021-07-05 10:12:05,974 INFO L306 CDTParser]: Found 1 translation units. [2021-07-05 10:12:05,974 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/sum_2x3-1.c [2021-07-05 10:12:05,979 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a1462fc96/bdc1c669e1aa4270b2db060c7d9a536b/FLAG05c6951e8 [2021-07-05 10:12:05,996 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a1462fc96/bdc1c669e1aa4270b2db060c7d9a536b [2021-07-05 10:12:05,999 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-05 10:12:06,001 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-07-05 10:12:06,004 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-07-05 10:12:06,004 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-07-05 10:12:06,007 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-07-05 10:12:06,008 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.07 10:12:05" (1/1) ... [2021-07-05 10:12:06,009 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3795ab7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.07 10:12:06, skipping insertion in model container [2021-07-05 10:12:06,009 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.07 10:12:05" (1/1) ... [2021-07-05 10:12:06,015 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-07-05 10:12:06,027 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-07-05 10:12:06,137 WARN L224 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/sum_2x3-1.c[479,492] [2021-07-05 10:12:06,144 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-07-05 10:12:06,150 INFO L203 MainTranslator]: Completed pre-run [2021-07-05 10:12:06,161 WARN L224 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/sum_2x3-1.c[479,492] [2021-07-05 10:12:06,162 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-07-05 10:12:06,175 INFO L208 MainTranslator]: Completed translation [2021-07-05 10:12:06,175 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.07 10:12:06 WrapperNode [2021-07-05 10:12:06,175 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-07-05 10:12:06,176 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-05 10:12:06,176 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-05 10:12:06,178 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-05 10:12:06,184 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.07 10:12:06" (1/1) ... [2021-07-05 10:12:06,191 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.07 10:12:06" (1/1) ... [2021-07-05 10:12:06,209 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-05 10:12:06,210 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-05 10:12:06,210 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-05 10:12:06,211 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-05 10:12:06,217 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.07 10:12:06" (1/1) ... [2021-07-05 10:12:06,217 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.07 10:12:06" (1/1) ... [2021-07-05 10:12:06,219 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.07 10:12:06" (1/1) ... [2021-07-05 10:12:06,219 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.07 10:12:06" (1/1) ... [2021-07-05 10:12:06,238 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.07 10:12:06" (1/1) ... [2021-07-05 10:12:06,239 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.07 10:12:06" (1/1) ... [2021-07-05 10:12:06,243 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.07 10:12:06" (1/1) ... [2021-07-05 10:12:06,247 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-05 10:12:06,249 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-05 10:12:06,249 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-05 10:12:06,249 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-05 10:12:06,250 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.07 10:12:06" (1/1) ... [2021-07-05 10:12:06,256 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-05 10:12:06,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-07-05 10:12:06,282 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) [2021-07-05 10:12:06,297 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 [2021-07-05 10:12:06,328 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-05 10:12:06,328 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-05 10:12:06,328 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2021-07-05 10:12:06,328 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2021-07-05 10:12:06,329 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-07-05 10:12:06,329 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-07-05 10:12:06,552 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-05 10:12:06,553 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-07-05 10:12:06,554 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.07 10:12:06 BoogieIcfgContainer [2021-07-05 10:12:06,554 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-05 10:12:06,556 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-05 10:12:06,556 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-05 10:12:06,558 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-05 10:12:06,572 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.07 10:12:05" (1/3) ... [2021-07-05 10:12:06,574 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bcdbb78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.07 10:12:06, skipping insertion in model container [2021-07-05 10:12:06,574 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.07 10:12:06" (2/3) ... [2021-07-05 10:12:06,574 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bcdbb78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.07 10:12:06, skipping insertion in model container [2021-07-05 10:12:06,574 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.07 10:12:06" (3/3) ... [2021-07-05 10:12:06,576 INFO L111 eAbstractionObserver]: Analyzing ICFG sum_2x3-1.c [2021-07-05 10:12:06,581 INFO L198 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-05 10:12:06,581 INFO L158 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-05 10:12:06,651 INFO L328 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION ======== [2021-07-05 10:12:06,685 INFO L329 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, mLimitAnalysisTime=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-07-05 10:12:06,686 INFO L330 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-07-05 10:12:06,701 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-07-05 10:12:06,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-07-05 10:12:06,704 INFO L517 BasicCegarLoop]: Found error trace [2021-07-05 10:12:06,705 INFO L525 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-05 10:12:06,705 INFO L374 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-07-05 10:12:06,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-05 10:12:06,710 INFO L82 PathProgramCache]: Analyzing trace with hash -358017204, now seen corresponding path program 1 times [2021-07-05 10:12:06,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-05 10:12:06,719 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753370726] [2021-07-05 10:12:06,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-05 10:12:06,720 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-05 10:12:06,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-05 10:12:06,858 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 10:12:06,859 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-05 10:12:06,861 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 10:12:06,862 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-05 10:12:06,878 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 10:12:06,879 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-05 10:12:06,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-07-05 10:12:06,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-05 10:12:06,921 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 10:12:06,922 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-05 10:12:06,932 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 10:12:06,941 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-05 10:12:06,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-05 10:12:06,957 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-05 10:12:06,957 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753370726] [2021-07-05 10:12:06,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753370726] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-05 10:12:06,958 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-05 10:12:06,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-05 10:12:06,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680049879] [2021-07-05 10:12:06,963 INFO L425 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-05 10:12:06,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-05 10:12:06,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-05 10:12:06,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-05 10:12:06,978 INFO L87 Difference]: Start difference. First operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 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) [2021-07-05 10:12:07,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-05 10:12:07,032 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2021-07-05 10:12:07,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-05 10:12:07,034 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 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 [2021-07-05 10:12:07,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-05 10:12:07,040 INFO L225 Difference]: With dead ends: 25 [2021-07-05 10:12:07,040 INFO L226 Difference]: Without dead ends: 15 [2021-07-05 10:12:07,042 INFO L795 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 40.7ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-07-05 10:12:07,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-07-05 10:12:07,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-07-05 10:12:07,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.1) internal successors, (11), 11 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-07-05 10:12:07,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-07-05 10:12:07,071 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2021-07-05 10:12:07,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-05 10:12:07,072 INFO L442 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-07-05 10:12:07,072 INFO L443 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 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) [2021-07-05 10:12:07,072 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2021-07-05 10:12:07,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-05 10:12:07,073 INFO L517 BasicCegarLoop]: Found error trace [2021-07-05 10:12:07,073 INFO L525 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-05 10:12:07,074 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-05 10:12:07,074 INFO L374 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-07-05 10:12:07,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-05 10:12:07,075 INFO L82 PathProgramCache]: Analyzing trace with hash 679465686, now seen corresponding path program 1 times [2021-07-05 10:12:07,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-05 10:12:07,075 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093548726] [2021-07-05 10:12:07,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-05 10:12:07,076 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-05 10:12:07,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-05 10:12:07,105 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 10:12:07,106 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-05 10:12:07,106 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 10:12:07,107 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-05 10:12:07,110 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 10:12:07,111 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-05 10:12:07,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-07-05 10:12:07,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-05 10:12:07,125 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 10:12:07,125 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-05 10:12:07,130 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 10:12:07,130 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-05 10:12:07,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-07-05 10:12:07,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-05 10:12:07,145 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 10:12:07,145 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-05 10:12:07,146 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 10:12:07,146 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-05 10:12:07,153 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-05 10:12:07,153 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-05 10:12:07,153 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093548726] [2021-07-05 10:12:07,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093548726] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-05 10:12:07,154 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905608168] [2021-07-05 10:12:07,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-05 10:12:07,154 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-05 10:12:07,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-07-05 10:12:07,157 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) [2021-07-05 10:12:07,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-07-05 10:12:07,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-05 10:12:07,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-05 10:12:07,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-05 10:12:07,234 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 10:12:07,235 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-05 10:12:07,236 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 10:12:07,239 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-05 10:12:07,240 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 10:12:07,240 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-05 10:12:07,241 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 10:12:07,242 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-05 10:12:07,242 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 10:12:07,243 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-05 10:12:07,243 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 10:12:07,244 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-05 10:12:07,244 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 10:12:07,245 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-05 10:12:07,245 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 10:12:07,245 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-05 10:12:07,258 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 10:12:07,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-07-05 10:12:07,270 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 10:12:07,271 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-05 10:12:07,272 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-07-05 10:12:07,273 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 10:12:07,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-07-05 10:12:07,274 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 10:12:07,275 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-05 10:12:07,275 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-07-05 10:12:07,276 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 10:12:07,282 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-05 10:12:07,282 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 10:12:07,283 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-05 10:12:07,283 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 10:12:07,284 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-05 10:12:07,284 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 10:12:07,285 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-05 10:12:07,285 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 10:12:07,286 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-05 10:12:07,286 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 10:12:07,286 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-05 10:12:07,295 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 10:12:07,295 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-05 10:12:07,296 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 10:12:07,296 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-05 10:12:07,297 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 10:12:07,297 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-05 10:12:07,297 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 10:12:07,298 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-05 10:12:07,299 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 10:12:07,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-07-05 10:12:07,300 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 10:12:07,300 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-05 10:12:07,301 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-07-05 10:12:07,302 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 10:12:07,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-07-05 10:12:07,303 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 10:12:07,303 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-05 10:12:07,304 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-07-05 10:12:07,304 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 10:12:07,306 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-05 10:12:07,306 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 10:12:07,307 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-05 10:12:07,307 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 10:12:07,308 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-05 10:12:07,308 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 10:12:07,309 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-05 10:12:07,309 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 10:12:07,309 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-05 10:12:07,310 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 10:12:07,310 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-05 10:12:07,313 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 10:12:07,314 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-07-05 10:12:07,315 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 10:12:07,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-07-05 10:12:07,318 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 10:12:07,319 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-07-05 10:12:07,319 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-07-05 10:12:07,320 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 10:12:07,324 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-05 10:12:07,324 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 10:12:07,324 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-05 10:12:07,325 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 10:12:07,326 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-05 10:12:07,326 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 10:12:07,326 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-05 10:12:07,327 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 10:12:07,327 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-05 10:12:07,328 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 10:12:07,328 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-05 10:12:07,329 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 10:12:07,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-07-05 10:12:07,331 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 10:12:07,332 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-07-05 10:12:07,337 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-07-05 10:12:07,339 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 10:12:07,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-07-05 10:12:07,345 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 10:12:07,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-07-05 10:12:07,347 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 10:12:07,349 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-07-05 10:12:07,350 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-07-05 10:12:07,356 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-07-05 10:12:07,357 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 10:12:07,359 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-05 10:12:07,360 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 10:12:07,361 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-05 10:12:07,362 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 10:12:07,362 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-05 10:12:07,362 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 10:12:07,363 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-05 10:12:07,363 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 10:12:07,364 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-05 10:12:07,365 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 10:12:07,370 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-05 10:12:07,371 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 10:12:07,371 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-05 10:12:07,372 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 10:12:07,376 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-05 10:12:07,377 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 10:12:07,377 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-05 10:12:07,378 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 10:12:07,381 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-05 10:12:07,393 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 10:12:07,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-07-05 10:12:07,396 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 10:12:07,396 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-07-05 10:12:07,397 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-07-05 10:12:07,398 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 10:12:07,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-07-05 10:12:07,401 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 10:12:07,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-07-05 10:12:07,403 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 10:12:07,403 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-07-05 10:12:07,404 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-07-05 10:12:07,405 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-07-05 10:12:07,406 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 10:12:07,409 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-05 10:12:07,410 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 10:12:07,410 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-05 10:12:07,411 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 10:12:07,411 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-05 10:12:07,412 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 10:12:07,412 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-05 10:12:07,413 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 10:12:07,413 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-05 10:12:07,414 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 10:12:07,414 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-05 10:12:07,414 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 10:12:07,415 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-05 10:12:07,415 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-05 10:12:07,416 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-05 10:12:07,416 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-05 10:12:07,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905608168] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-05 10:12:07,417 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-05 10:12:07,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-07-05 10:12:07,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874144501] [2021-07-05 10:12:07,418 INFO L425 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-05 10:12:07,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-05 10:12:07,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-05 10:12:07,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-07-05 10:12:07,419 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 8 states, 6 states have (on average 2.5) internal successors, (15), 8 states have internal predecessors, (15), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2021-07-05 10:12:07,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-05 10:12:07,467 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2021-07-05 10:12:07,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-05 10:12:07,467 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.5) internal successors, (15), 8 states have internal predecessors, (15), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) Word has length 16 [2021-07-05 10:12:07,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-05 10:12:07,468 INFO L225 Difference]: With dead ends: 22 [2021-07-05 10:12:07,468 INFO L226 Difference]: Without dead ends: 18 [2021-07-05 10:12:07,469 INFO L795 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 47.4ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-07-05 10:12:07,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-07-05 10:12:07,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-07-05 10:12:07,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 13 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-07-05 10:12:07,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2021-07-05 10:12:07,474 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2021-07-05 10:12:07,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-05 10:12:07,474 INFO L442 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2021-07-05 10:12:07,474 INFO L443 AbstractCegarLoop]: Interpolant automaton has has 8 states, 6 states have (on average 2.5) internal successors, (15), 8 states have internal predecessors, (15), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2021-07-05 10:12:07,475 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2021-07-05 10:12:07,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-05 10:12:07,475 INFO L517 BasicCegarLoop]: Found error trace [2021-07-05 10:12:07,476 INFO L525 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-05 10:12:07,501 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-07-05 10:12:07,676 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-05 10:12:07,677 INFO L374 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-07-05 10:12:07,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-05 10:12:07,678 INFO L82 PathProgramCache]: Analyzing trace with hash -41010676, now seen corresponding path program 2 times [2021-07-05 10:12:07,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-05 10:12:07,678 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179461702] [2021-07-05 10:12:07,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-05 10:12:07,678 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-05 10:12:07,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-07-05 10:12:07,699 INFO L224 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-07-05 10:12:07,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-07-05 10:12:07,718 INFO L224 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-07-05 10:12:07,741 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-07-05 10:12:07,741 INFO L639 BasicCegarLoop]: Counterexample is feasible [2021-07-05 10:12:07,744 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-05 10:12:07,744 WARN L182 nStatisticsGenerator]: total relevant statements: 0 [2021-07-05 10:12:07,778 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.07 10:12:07 BoogieIcfgContainer [2021-07-05 10:12:07,778 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-05 10:12:07,779 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-07-05 10:12:07,779 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-07-05 10:12:07,779 INFO L275 PluginConnector]: Witness Printer initialized [2021-07-05 10:12:07,780 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.07 10:12:06" (3/4) ... [2021-07-05 10:12:07,781 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-07-05 10:12:07,813 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-07-05 10:12:07,813 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-07-05 10:12:07,814 INFO L168 Benchmark]: Toolchain (without parser) took 1812.91 ms. Allocated memory was 52.4 MB in the beginning and 75.5 MB in the end (delta: 23.1 MB). Free memory was 29.8 MB in the beginning and 37.1 MB in the end (delta: -7.3 MB). Peak memory consumption was 15.8 MB. Max. memory is 16.1 GB. [2021-07-05 10:12:07,814 INFO L168 Benchmark]: CDTParser took 0.34 ms. Allocated memory is still 52.4 MB. Free memory was 33.8 MB in the beginning and 33.8 MB in the end (delta: 39.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-07-05 10:12:07,814 INFO L168 Benchmark]: CACSL2BoogieTranslator took 171.44 ms. Allocated memory is still 52.4 MB. Free memory was 29.7 MB in the beginning and 32.2 MB in the end (delta: -2.5 MB). Peak memory consumption was 5.0 MB. Max. memory is 16.1 GB. [2021-07-05 10:12:07,815 INFO L168 Benchmark]: Boogie Procedure Inliner took 33.23 ms. Allocated memory was 52.4 MB in the beginning and 62.9 MB in the end (delta: 10.5 MB). Free memory was 32.2 MB in the beginning and 47.4 MB in the end (delta: -15.2 MB). Peak memory consumption was 6.5 MB. Max. memory is 16.1 GB. [2021-07-05 10:12:07,815 INFO L168 Benchmark]: Boogie Preprocessor took 36.97 ms. Allocated memory is still 62.9 MB. Free memory was 47.4 MB in the beginning and 46.4 MB in the end (delta: 927.4 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-07-05 10:12:07,816 INFO L168 Benchmark]: RCFGBuilder took 305.64 ms. Allocated memory is still 62.9 MB. Free memory was 46.4 MB in the beginning and 35.1 MB in the end (delta: 11.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-07-05 10:12:07,816 INFO L168 Benchmark]: TraceAbstraction took 1222.94 ms. Allocated memory was 62.9 MB in the beginning and 75.5 MB in the end (delta: 12.6 MB). Free memory was 34.5 MB in the beginning and 39.2 MB in the end (delta: -4.7 MB). Peak memory consumption was 10.6 MB. Max. memory is 16.1 GB. [2021-07-05 10:12:07,816 INFO L168 Benchmark]: Witness Printer took 34.04 ms. Allocated memory is still 75.5 MB. Free memory was 39.2 MB in the beginning and 37.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-07-05 10:12:07,818 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34 ms. Allocated memory is still 52.4 MB. Free memory was 33.8 MB in the beginning and 33.8 MB in the end (delta: 39.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 171.44 ms. Allocated memory is still 52.4 MB. Free memory was 29.7 MB in the beginning and 32.2 MB in the end (delta: -2.5 MB). Peak memory consumption was 5.0 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 33.23 ms. Allocated memory was 52.4 MB in the beginning and 62.9 MB in the end (delta: 10.5 MB). Free memory was 32.2 MB in the beginning and 47.4 MB in the end (delta: -15.2 MB). Peak memory consumption was 6.5 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 36.97 ms. Allocated memory is still 62.9 MB. Free memory was 47.4 MB in the beginning and 46.4 MB in the end (delta: 927.4 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 305.64 ms. Allocated memory is still 62.9 MB. Free memory was 46.4 MB in the beginning and 35.1 MB in the end (delta: 11.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1222.94 ms. Allocated memory was 62.9 MB in the beginning and 75.5 MB in the end (delta: 12.6 MB). Free memory was 34.5 MB in the beginning and 39.2 MB in the end (delta: -4.7 MB). Peak memory consumption was 10.6 MB. Max. memory is 16.1 GB. * Witness Printer took 34.04 ms. Allocated memory is still 75.5 MB. Free memory was 39.2 MB in the beginning and 37.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 18]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L14] int a = 2; [L15] int b = 3; [L16] CALL, EXPR sum(a, b) VAL [\old(m)=3, \old(n)=2] [L6] COND FALSE !(n <= 0) VAL [\old(m)=3, \old(n)=2, m=3, n=2] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=4, \old(n)=1] [L6] COND FALSE !(n <= 0) VAL [\old(m)=4, \old(n)=1, m=4, n=1] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=5, \old(n)=0] [L6] COND TRUE n <= 0 [L7] return m + n; VAL [\old(m)=5, \old(n)=0, \result=5, m=5, n=0] [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=4, \old(n)=1, m=4, n=1, sum(n - 1, m + 1)=5] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=3, \old(n)=2, m=3, n=2, sum(n - 1, m + 1)=5] [L9] return sum(n - 1, m + 1); [L16] RET, EXPR sum(a, b) [L16] int result = sum(a, b); [L17] COND TRUE result == a + b [L18] reach_error() - StatisticsResult: Ultimate Automizer benchmark data for error location: ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION CFG has 2 procedures, 16 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1097.7ms, OverallIterations: 3, TraceHistogramMax: 3, EmptinessCheckTime: 8.1ms, AutomataDifference: 129.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 11.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 20 SDtfs, 23 SDslu, 44 SDs, 0 SdLazy, 54 SolverSat, 2 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 43.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 88.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=18occurred in iteration=2, InterpolantAutomatonStates: 11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 22.0ms AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 17.3ms SsaConstructionTime, 91.0ms SatisfiabilityAnalysisTime, 400.8ms InterpolantComputationTime, 64 NumberOfCodeBlocks, 64 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 39 ConstructedInterpolants, 0 QuantifiedInterpolants, 83 SizeOfPredicates, 3 NumberOfNonLiveVariables, 76 ConjunctsInSsa, 6 ConjunctsInUnsatCore, 3 InterpolantComputations, 1 PerfectInterpolantSequences, 4/8 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! [2021-07-05 10:12:07,846 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...