./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/list-properties/splice-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 54858612 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/list-properties/splice-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 22d654ad48908d2db90206c3276d568dc9029be1 ...................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 0.2.0-5485861 [2020-10-25 22:03:46,117 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-25 22:03:46,121 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-25 22:03:46,177 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-25 22:03:46,177 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-25 22:03:46,183 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-25 22:03:46,186 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-25 22:03:46,193 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-25 22:03:46,196 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-25 22:03:46,204 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-25 22:03:46,206 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-25 22:03:46,212 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-25 22:03:46,213 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-25 22:03:46,216 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-25 22:03:46,218 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-25 22:03:46,221 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-25 22:03:46,222 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-25 22:03:46,227 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-25 22:03:46,229 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-25 22:03:46,238 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-25 22:03:46,242 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-25 22:03:46,243 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-25 22:03:46,245 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-25 22:03:46,250 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-25 22:03:46,252 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-25 22:03:46,253 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-25 22:03:46,253 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-25 22:03:46,254 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-25 22:03:46,255 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-25 22:03:46,256 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-25 22:03:46,257 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-25 22:03:46,257 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-25 22:03:46,258 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-25 22:03:46,259 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-25 22:03:46,261 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-25 22:03:46,261 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-25 22:03:46,262 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-25 22:03:46,262 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-25 22:03:46,262 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-25 22:03:46,264 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-25 22:03:46,264 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-25 22:03:46,265 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-25 22:03:46,292 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-25 22:03:46,292 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-25 22:03:46,294 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-25 22:03:46,294 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-25 22:03:46,295 INFO L138 SettingsManager]: * Use SBE=true [2020-10-25 22:03:46,295 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-25 22:03:46,295 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-25 22:03:46,296 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-25 22:03:46,296 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-25 22:03:46,296 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-25 22:03:46,296 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-25 22:03:46,297 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-25 22:03:46,297 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-25 22:03:46,297 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-25 22:03:46,297 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-25 22:03:46,298 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-25 22:03:46,298 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-25 22:03:46,298 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-25 22:03:46,299 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-25 22:03:46,299 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-25 22:03:46,299 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-25 22:03:46,299 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-25 22:03:46,300 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-25 22:03:46,300 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-25 22:03:46,300 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-25 22:03:46,300 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-25 22:03:46,301 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-25 22:03:46,301 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-25 22:03:46,301 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-25 22:03:46,302 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 22d654ad48908d2db90206c3276d568dc9029be1 [2020-10-25 22:03:46,717 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-25 22:03:46,755 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-25 22:03:46,760 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-25 22:03:46,762 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-25 22:03:46,763 INFO L275 PluginConnector]: CDTParser initialized [2020-10-25 22:03:46,764 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-properties/splice-1.i [2020-10-25 22:03:46,858 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/722fdaf6a/540792ec21d4459080ebb2875c3a0508/FLAGcd2347e95 [2020-10-25 22:03:47,554 INFO L306 CDTParser]: Found 1 translation units. [2020-10-25 22:03:47,555 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-properties/splice-1.i [2020-10-25 22:03:47,577 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/722fdaf6a/540792ec21d4459080ebb2875c3a0508/FLAGcd2347e95 [2020-10-25 22:03:47,859 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/722fdaf6a/540792ec21d4459080ebb2875c3a0508 [2020-10-25 22:03:47,862 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-25 22:03:47,869 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-25 22:03:47,871 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-25 22:03:47,872 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-25 22:03:47,876 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-25 22:03:47,877 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 10:03:47" (1/1) ... [2020-10-25 22:03:47,881 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ee88712 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:03:47, skipping insertion in model container [2020-10-25 22:03:47,881 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 10:03:47" (1/1) ... [2020-10-25 22:03:47,890 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-25 22:03:47,982 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-25 22:03:48,339 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-25 22:03:48,356 INFO L203 MainTranslator]: Completed pre-run [2020-10-25 22:03:48,454 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-25 22:03:48,525 INFO L208 MainTranslator]: Completed translation [2020-10-25 22:03:48,525 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:03:48 WrapperNode [2020-10-25 22:03:48,526 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-25 22:03:48,527 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-25 22:03:48,527 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-25 22:03:48,527 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-25 22:03:48,536 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:03:48" (1/1) ... [2020-10-25 22:03:48,552 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:03:48" (1/1) ... [2020-10-25 22:03:48,577 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-25 22:03:48,578 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-25 22:03:48,579 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-25 22:03:48,579 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-25 22:03:48,589 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:03:48" (1/1) ... [2020-10-25 22:03:48,590 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:03:48" (1/1) ... [2020-10-25 22:03:48,594 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:03:48" (1/1) ... [2020-10-25 22:03:48,595 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:03:48" (1/1) ... [2020-10-25 22:03:48,603 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:03:48" (1/1) ... [2020-10-25 22:03:48,609 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:03:48" (1/1) ... [2020-10-25 22:03:48,613 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:03:48" (1/1) ... [2020-10-25 22:03:48,621 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-25 22:03:48,623 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-25 22:03:48,627 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-25 22:03:48,627 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-25 22:03:48,628 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:03:48" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-25 22:03:48,707 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-25 22:03:48,707 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-25 22:03:48,707 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-25 22:03:48,708 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-25 22:03:48,708 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-25 22:03:48,708 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-25 22:03:48,708 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-25 22:03:48,709 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-25 22:03:48,709 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-25 22:03:49,257 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-25 22:03:49,258 INFO L298 CfgBuilder]: Removed 14 assume(true) statements. [2020-10-25 22:03:49,260 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 10:03:49 BoogieIcfgContainer [2020-10-25 22:03:49,261 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-25 22:03:49,263 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-25 22:03:49,263 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-25 22:03:49,268 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-25 22:03:49,269 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.10 10:03:47" (1/3) ... [2020-10-25 22:03:49,270 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@611f4441 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 10:03:49, skipping insertion in model container [2020-10-25 22:03:49,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:03:48" (2/3) ... [2020-10-25 22:03:49,271 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@611f4441 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 10:03:49, skipping insertion in model container [2020-10-25 22:03:49,271 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 10:03:49" (3/3) ... [2020-10-25 22:03:49,273 INFO L111 eAbstractionObserver]: Analyzing ICFG splice-1.i [2020-10-25 22:03:49,293 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-25 22:03:49,299 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-25 22:03:49,319 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-25 22:03:49,354 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-25 22:03:49,354 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-25 22:03:49,354 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-25 22:03:49,355 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-25 22:03:49,355 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-25 22:03:49,355 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-25 22:03:49,356 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-25 22:03:49,356 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-25 22:03:49,374 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-10-25 22:03:49,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-25 22:03:49,381 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:03:49,382 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:03:49,383 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:03:49,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:03:49,392 INFO L82 PathProgramCache]: Analyzing trace with hash 1178395773, now seen corresponding path program 1 times [2020-10-25 22:03:49,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:03:49,407 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909066580] [2020-10-25 22:03:49,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:03:49,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:03:49,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:03:49,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909066580] [2020-10-25 22:03:49,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 22:03:49,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-25 22:03:49,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80872129] [2020-10-25 22:03:49,592 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-25 22:03:49,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:03:49,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-25 22:03:49,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-25 22:03:49,613 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 2 states. [2020-10-25 22:03:49,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:03:49,635 INFO L93 Difference]: Finished difference Result 51 states and 76 transitions. [2020-10-25 22:03:49,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-25 22:03:49,637 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 14 [2020-10-25 22:03:49,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:03:49,646 INFO L225 Difference]: With dead ends: 51 [2020-10-25 22:03:49,647 INFO L226 Difference]: Without dead ends: 25 [2020-10-25 22:03:49,650 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-25 22:03:49,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-25 22:03:49,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-10-25 22:03:49,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-25 22:03:49,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2020-10-25 22:03:49,693 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 14 [2020-10-25 22:03:49,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:03:49,694 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2020-10-25 22:03:49,694 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-25 22:03:49,694 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2020-10-25 22:03:49,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-25 22:03:49,695 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:03:49,695 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:03:49,696 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-25 22:03:49,696 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:03:49,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:03:49,697 INFO L82 PathProgramCache]: Analyzing trace with hash 354051700, now seen corresponding path program 1 times [2020-10-25 22:03:49,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:03:49,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760255012] [2020-10-25 22:03:49,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:03:49,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:03:49,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:03:49,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760255012] [2020-10-25 22:03:49,805 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 22:03:49,805 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-25 22:03:49,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388466719] [2020-10-25 22:03:49,807 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-25 22:03:49,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:03:49,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-25 22:03:49,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-25 22:03:49,810 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand 4 states. [2020-10-25 22:03:49,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:03:49,887 INFO L93 Difference]: Finished difference Result 46 states and 57 transitions. [2020-10-25 22:03:49,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-25 22:03:49,888 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-10-25 22:03:49,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:03:49,889 INFO L225 Difference]: With dead ends: 46 [2020-10-25 22:03:49,889 INFO L226 Difference]: Without dead ends: 37 [2020-10-25 22:03:49,891 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-25 22:03:49,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-25 22:03:49,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2020-10-25 22:03:49,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-25 22:03:49,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2020-10-25 22:03:49,898 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 16 [2020-10-25 22:03:49,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:03:49,899 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2020-10-25 22:03:49,899 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-25 22:03:49,899 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2020-10-25 22:03:49,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-25 22:03:49,900 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:03:49,900 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:03:49,901 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-25 22:03:49,901 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:03:49,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:03:49,902 INFO L82 PathProgramCache]: Analyzing trace with hash -672513495, now seen corresponding path program 1 times [2020-10-25 22:03:49,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:03:49,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909183011] [2020-10-25 22:03:49,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:03:49,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:03:49,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:03:49,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909183011] [2020-10-25 22:03:49,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 22:03:49,989 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-25 22:03:49,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817743753] [2020-10-25 22:03:49,992 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-25 22:03:49,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:03:49,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-25 22:03:49,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-25 22:03:49,999 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand 4 states. [2020-10-25 22:03:50,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:03:50,097 INFO L93 Difference]: Finished difference Result 53 states and 66 transitions. [2020-10-25 22:03:50,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-25 22:03:50,098 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-10-25 22:03:50,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:03:50,101 INFO L225 Difference]: With dead ends: 53 [2020-10-25 22:03:50,102 INFO L226 Difference]: Without dead ends: 43 [2020-10-25 22:03:50,103 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-25 22:03:50,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-25 22:03:50,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 39. [2020-10-25 22:03:50,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-25 22:03:50,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 51 transitions. [2020-10-25 22:03:50,112 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 51 transitions. Word has length 18 [2020-10-25 22:03:50,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:03:50,113 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 51 transitions. [2020-10-25 22:03:50,113 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-25 22:03:50,114 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 51 transitions. [2020-10-25 22:03:50,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-25 22:03:50,115 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:03:50,115 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:03:50,116 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-25 22:03:50,116 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:03:50,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:03:50,117 INFO L82 PathProgramCache]: Analyzing trace with hash -1334418194, now seen corresponding path program 1 times [2020-10-25 22:03:50,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:03:50,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79869563] [2020-10-25 22:03:50,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:03:50,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:03:50,240 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:03:50,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79869563] [2020-10-25 22:03:50,241 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 22:03:50,241 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-25 22:03:50,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795739238] [2020-10-25 22:03:50,242 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-25 22:03:50,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:03:50,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-25 22:03:50,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-25 22:03:50,245 INFO L87 Difference]: Start difference. First operand 39 states and 51 transitions. Second operand 6 states. [2020-10-25 22:03:50,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:03:50,459 INFO L93 Difference]: Finished difference Result 74 states and 98 transitions. [2020-10-25 22:03:50,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-25 22:03:50,462 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-10-25 22:03:50,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:03:50,464 INFO L225 Difference]: With dead ends: 74 [2020-10-25 22:03:50,464 INFO L226 Difference]: Without dead ends: 45 [2020-10-25 22:03:50,466 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-10-25 22:03:50,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-25 22:03:50,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 41. [2020-10-25 22:03:50,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-25 22:03:50,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 53 transitions. [2020-10-25 22:03:50,479 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 53 transitions. Word has length 19 [2020-10-25 22:03:50,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:03:50,481 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 53 transitions. [2020-10-25 22:03:50,481 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-25 22:03:50,481 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 53 transitions. [2020-10-25 22:03:50,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-25 22:03:50,483 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:03:50,483 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:03:50,483 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-25 22:03:50,483 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:03:50,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:03:50,484 INFO L82 PathProgramCache]: Analyzing trace with hash -1082823709, now seen corresponding path program 1 times [2020-10-25 22:03:50,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:03:50,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197963203] [2020-10-25 22:03:50,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:03:50,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-25 22:03:50,552 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-25 22:03:50,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-25 22:03:50,585 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-25 22:03:50,627 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-25 22:03:50,628 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-25 22:03:50,628 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-25 22:03:50,671 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.10 10:03:50 BoogieIcfgContainer [2020-10-25 22:03:50,671 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-25 22:03:50,672 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-25 22:03:50,672 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-25 22:03:50,672 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-25 22:03:50,673 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 10:03:49" (3/4) ... [2020-10-25 22:03:50,675 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-10-25 22:03:50,737 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-25 22:03:50,738 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-25 22:03:50,740 INFO L168 Benchmark]: Toolchain (without parser) took 2875.12 ms. Allocated memory was 46.1 MB in the beginning and 56.6 MB in the end (delta: 10.5 MB). Free memory was 22.0 MB in the beginning and 20.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 12.5 MB. Max. memory is 16.1 GB. [2020-10-25 22:03:50,741 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 37.7 MB. Free memory was 24.3 MB in the beginning and 24.3 MB in the end (delta: 24.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-25 22:03:50,744 INFO L168 Benchmark]: CACSL2BoogieTranslator took 655.02 ms. Allocated memory is still 46.1 MB. Free memory was 21.4 MB in the beginning and 29.3 MB in the end (delta: -7.9 MB). Peak memory consumption was 7.8 MB. Max. memory is 16.1 GB. [2020-10-25 22:03:50,745 INFO L168 Benchmark]: Boogie Procedure Inliner took 50.80 ms. Allocated memory is still 46.1 MB. Free memory was 29.1 MB in the beginning and 27.2 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-25 22:03:50,745 INFO L168 Benchmark]: Boogie Preprocessor took 43.45 ms. Allocated memory is still 46.1 MB. Free memory was 27.2 MB in the beginning and 25.7 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-25 22:03:50,746 INFO L168 Benchmark]: RCFGBuilder took 638.03 ms. Allocated memory was 46.1 MB in the beginning and 56.6 MB in the end (delta: 10.5 MB). Free memory was 25.5 MB in the beginning and 24.9 MB in the end (delta: 660.9 kB). Peak memory consumption was 11.7 MB. Max. memory is 16.1 GB. [2020-10-25 22:03:50,747 INFO L168 Benchmark]: TraceAbstraction took 1408.24 ms. Allocated memory is still 56.6 MB. Free memory was 24.4 MB in the beginning and 23.7 MB in the end (delta: 619.5 kB). Peak memory consumption was 1.4 MB. Max. memory is 16.1 GB. [2020-10-25 22:03:50,748 INFO L168 Benchmark]: Witness Printer took 65.78 ms. Allocated memory is still 56.6 MB. Free memory was 23.7 MB in the beginning and 20.5 MB in the end (delta: 3.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-25 22:03:50,751 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 37.7 MB. Free memory was 24.3 MB in the beginning and 24.3 MB in the end (delta: 24.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 655.02 ms. Allocated memory is still 46.1 MB. Free memory was 21.4 MB in the beginning and 29.3 MB in the end (delta: -7.9 MB). Peak memory consumption was 7.8 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 50.80 ms. Allocated memory is still 46.1 MB. Free memory was 29.1 MB in the beginning and 27.2 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 43.45 ms. Allocated memory is still 46.1 MB. Free memory was 27.2 MB in the beginning and 25.7 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 638.03 ms. Allocated memory was 46.1 MB in the beginning and 56.6 MB in the end (delta: 10.5 MB). Free memory was 25.5 MB in the beginning and 24.9 MB in the end (delta: 660.9 kB). Peak memory consumption was 11.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1408.24 ms. Allocated memory is still 56.6 MB. Free memory was 24.4 MB in the beginning and 23.7 MB in the end (delta: 619.5 kB). Peak memory consumption was 1.4 MB. Max. memory is 16.1 GB. * Witness Printer took 65.78 ms. Allocated memory is still 56.6 MB. Free memory was 23.7 MB in the beginning and 20.5 MB in the end (delta: 3.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 12]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L532] int flag = 1; [L533] List a = (List) malloc(sizeof(struct node)); [L534] COND FALSE !(a == 0) [L535] List t; [L536] List l1; [L537] List l2; [L538] List b; [L539] List u; [L540] List p = a; [L541] COND TRUE __VERIFIER_nondet_int() [L542] COND TRUE \read(flag) [L543] p->h = 1 [L544] flag = 0 [L549] t = (List) malloc(sizeof(struct node)) [L550] COND FALSE !(t == 0) [L551] p->n = t [L552] EXPR p->n [L552] p = p->n [L541] COND FALSE !(__VERIFIER_nondet_int()) [L554] p->h = 3 [L555] EXPR a->h [L555] COND FALSE !(a->h == 3) [L556] flag = 1 [L557] l1 = 0 [L558] l2 = 0 [L559] p = a [L560] EXPR p->h [L560] COND TRUE p->h != 3 [L561] t = p [L562] EXPR p->n [L562] p = p->n [L563] COND TRUE \read(flag) [L564] t->n = l1 [L565] l1 = t [L566] flag = 0 [L560] EXPR p->h [L560] COND FALSE !(p->h != 3) [L573] p = l1 [L574] COND TRUE p != 0 [L575] EXPR p->h [L575] COND TRUE p->h != 2 [L12] COND FALSE !(0) [L12] __assert_fail ("0", "splice-1.c", 3, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.2s, OverallIterations: 5, TraceHistogramMax: 2, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 121 SDtfs, 30 SDslu, 144 SDs, 0 SdLazy, 109 SolverSat, 9 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=41occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 15 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 92 NumberOfCodeBlocks, 92 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 63 ConstructedInterpolants, 0 QuantifiedInterpolants, 2555 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 PerfectInterpolantSequences, 2/2 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! Received shutdown request...