./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/list-ext3-properties/dll_nullified-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9a8b2e8d 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_1.3.100.v20150511-1540.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-ext3-properties/dll_nullified-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 c6bee9027c6ee41df2f7df0c67f6de4e3d806cb7 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 0.1.25-9a8b2e8 [2020-10-20 00:52:43,415 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 00:52:43,417 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 00:52:43,441 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 00:52:43,442 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 00:52:43,443 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 00:52:43,445 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 00:52:43,447 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 00:52:43,449 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 00:52:43,450 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 00:52:43,451 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 00:52:43,453 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 00:52:43,453 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 00:52:43,455 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 00:52:43,456 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 00:52:43,457 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 00:52:43,459 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 00:52:43,460 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 00:52:43,462 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 00:52:43,464 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 00:52:43,466 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 00:52:43,476 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 00:52:43,477 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 00:52:43,478 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 00:52:43,481 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 00:52:43,482 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 00:52:43,482 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 00:52:43,483 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 00:52:43,484 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 00:52:43,485 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 00:52:43,485 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 00:52:43,486 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 00:52:43,487 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 00:52:43,488 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 00:52:43,489 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 00:52:43,490 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 00:52:43,491 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 00:52:43,491 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 00:52:43,491 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 00:52:43,492 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 00:52:43,493 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 00:52:43,494 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-20 00:52:43,520 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 00:52:43,520 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 00:52:43,522 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 00:52:43,522 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 00:52:43,522 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 00:52:43,523 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 00:52:43,523 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-20 00:52:43,523 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-20 00:52:43,524 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-20 00:52:43,524 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 00:52:43,524 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-20 00:52:43,524 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-20 00:52:43,525 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-20 00:52:43,525 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-20 00:52:43,525 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-20 00:52:43,525 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 00:52:43,526 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-20 00:52:43,526 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 00:52:43,526 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 00:52:43,526 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-20 00:52:43,527 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-20 00:52:43,527 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 00:52:43,527 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 00:52:43,528 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-20 00:52:43,528 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-20 00:52:43,528 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-20 00:52:43,528 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-20 00:52:43,529 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-20 00:52:43,529 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 00:52:43,529 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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 -> c6bee9027c6ee41df2f7df0c67f6de4e3d806cb7 [2020-10-20 00:52:43,750 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 00:52:43,772 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 00:52:43,777 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 00:52:43,779 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 00:52:43,780 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 00:52:43,781 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-ext3-properties/dll_nullified-1.i [2020-10-20 00:52:43,849 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83d05b11c/d0ec7501c96e42ec8b24ce8323a71b28/FLAG3da33cded [2020-10-20 00:52:44,468 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 00:52:44,469 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext3-properties/dll_nullified-1.i [2020-10-20 00:52:44,485 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83d05b11c/d0ec7501c96e42ec8b24ce8323a71b28/FLAG3da33cded [2020-10-20 00:52:44,692 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83d05b11c/d0ec7501c96e42ec8b24ce8323a71b28 [2020-10-20 00:52:44,696 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 00:52:44,702 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-20 00:52:44,703 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 00:52:44,703 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 00:52:44,707 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 00:52:44,708 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:52:44" (1/1) ... [2020-10-20 00:52:44,713 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b09951f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:52:44, skipping insertion in model container [2020-10-20 00:52:44,714 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:52:44" (1/1) ... [2020-10-20 00:52:44,723 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 00:52:44,784 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 00:52:45,253 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:52:45,273 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 00:52:45,352 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:52:45,436 INFO L208 MainTranslator]: Completed translation [2020-10-20 00:52:45,437 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:52:45 WrapperNode [2020-10-20 00:52:45,437 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 00:52:45,439 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-20 00:52:45,439 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-20 00:52:45,439 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-20 00:52:45,449 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:52:45" (1/1) ... [2020-10-20 00:52:45,480 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:52:45" (1/1) ... [2020-10-20 00:52:45,508 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-20 00:52:45,508 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 00:52:45,509 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 00:52:45,509 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 00:52:45,519 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:52:45" (1/1) ... [2020-10-20 00:52:45,520 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:52:45" (1/1) ... [2020-10-20 00:52:45,524 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:52:45" (1/1) ... [2020-10-20 00:52:45,524 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:52:45" (1/1) ... [2020-10-20 00:52:45,533 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:52:45" (1/1) ... [2020-10-20 00:52:45,539 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:52:45" (1/1) ... [2020-10-20 00:52:45,542 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:52:45" (1/1) ... [2020-10-20 00:52:45,545 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 00:52:45,546 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 00:52:45,546 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 00:52:45,547 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 00:52:45,548 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:52:45" (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 [2020-10-20 00:52:45,618 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-20 00:52:45,618 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-20 00:52:45,618 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-20 00:52:45,619 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-20 00:52:45,619 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-20 00:52:45,619 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-20 00:52:45,619 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-20 00:52:45,620 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-20 00:52:45,620 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 00:52:45,620 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 00:52:46,052 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 00:52:46,053 INFO L298 CfgBuilder]: Removed 13 assume(true) statements. [2020-10-20 00:52:46,055 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:52:46 BoogieIcfgContainer [2020-10-20 00:52:46,055 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 00:52:46,056 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-20 00:52:46,057 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-20 00:52:46,060 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-20 00:52:46,061 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 12:52:44" (1/3) ... [2020-10-20 00:52:46,062 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58e86a24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:52:46, skipping insertion in model container [2020-10-20 00:52:46,062 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:52:45" (2/3) ... [2020-10-20 00:52:46,063 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58e86a24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:52:46, skipping insertion in model container [2020-10-20 00:52:46,063 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:52:46" (3/3) ... [2020-10-20 00:52:46,065 INFO L111 eAbstractionObserver]: Analyzing ICFG dll_nullified-1.i [2020-10-20 00:52:46,076 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-20 00:52:46,082 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-20 00:52:46,094 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-20 00:52:46,126 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-20 00:52:46,126 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-20 00:52:46,127 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-20 00:52:46,127 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 00:52:46,127 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 00:52:46,128 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-20 00:52:46,128 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 00:52:46,128 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-20 00:52:46,145 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-10-20 00:52:46,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-20 00:52:46,153 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:52:46,154 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:52:46,154 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:52:46,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:52:46,162 INFO L82 PathProgramCache]: Analyzing trace with hash -262159374, now seen corresponding path program 1 times [2020-10-20 00:52:46,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:52:46,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217798537] [2020-10-20 00:52:46,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:52:46,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:52:46,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:52:46,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217798537] [2020-10-20 00:52:46,316 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:52:46,316 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-20 00:52:46,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986445326] [2020-10-20 00:52:46,321 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-20 00:52:46,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:52:46,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-20 00:52:46,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-20 00:52:46,335 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 2 states. [2020-10-20 00:52:46,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:52:46,353 INFO L93 Difference]: Finished difference Result 53 states and 78 transitions. [2020-10-20 00:52:46,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-20 00:52:46,355 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 14 [2020-10-20 00:52:46,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:52:46,365 INFO L225 Difference]: With dead ends: 53 [2020-10-20 00:52:46,365 INFO L226 Difference]: Without dead ends: 26 [2020-10-20 00:52:46,369 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 [2020-10-20 00:52:46,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-20 00:52:46,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-20 00:52:46,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-20 00:52:46,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 35 transitions. [2020-10-20 00:52:46,405 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 35 transitions. Word has length 14 [2020-10-20 00:52:46,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:52:46,406 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 35 transitions. [2020-10-20 00:52:46,406 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-20 00:52:46,407 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 35 transitions. [2020-10-20 00:52:46,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-20 00:52:46,407 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:52:46,408 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:52:46,408 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-20 00:52:46,408 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:52:46,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:52:46,409 INFO L82 PathProgramCache]: Analyzing trace with hash -1209208016, now seen corresponding path program 1 times [2020-10-20 00:52:46,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:52:46,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738456016] [2020-10-20 00:52:46,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:52:46,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:52:46,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:52:46,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738456016] [2020-10-20 00:52:46,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:52:46,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-20 00:52:46,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541527704] [2020-10-20 00:52:46,496 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-20 00:52:46,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:52:46,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-20 00:52:46,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-20 00:52:46,497 INFO L87 Difference]: Start difference. First operand 26 states and 35 transitions. Second operand 3 states. [2020-10-20 00:52:46,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:52:46,557 INFO L93 Difference]: Finished difference Result 50 states and 68 transitions. [2020-10-20 00:52:46,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-20 00:52:46,559 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2020-10-20 00:52:46,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:52:46,560 INFO L225 Difference]: With dead ends: 50 [2020-10-20 00:52:46,560 INFO L226 Difference]: Without dead ends: 33 [2020-10-20 00:52:46,561 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-20 00:52:46,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-20 00:52:46,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 27. [2020-10-20 00:52:46,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-20 00:52:46,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 36 transitions. [2020-10-20 00:52:46,569 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 36 transitions. Word has length 14 [2020-10-20 00:52:46,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:52:46,569 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 36 transitions. [2020-10-20 00:52:46,569 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-20 00:52:46,570 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 36 transitions. [2020-10-20 00:52:46,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-20 00:52:46,571 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:52:46,571 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:52:46,571 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-20 00:52:46,572 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:52:46,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:52:46,572 INFO L82 PathProgramCache]: Analyzing trace with hash -1891099105, now seen corresponding path program 1 times [2020-10-20 00:52:46,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:52:46,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098957671] [2020-10-20 00:52:46,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:52:46,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:52:46,657 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:52:46,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098957671] [2020-10-20 00:52:46,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:52:46,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-20 00:52:46,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902343153] [2020-10-20 00:52:46,659 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-20 00:52:46,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:52:46,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-20 00:52:46,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-20 00:52:46,660 INFO L87 Difference]: Start difference. First operand 27 states and 36 transitions. Second operand 3 states. [2020-10-20 00:52:46,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:52:46,698 INFO L93 Difference]: Finished difference Result 57 states and 77 transitions. [2020-10-20 00:52:46,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-20 00:52:46,699 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-10-20 00:52:46,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:52:46,700 INFO L225 Difference]: With dead ends: 57 [2020-10-20 00:52:46,700 INFO L226 Difference]: Without dead ends: 33 [2020-10-20 00:52:46,701 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-20 00:52:46,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-20 00:52:46,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-10-20 00:52:46,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-20 00:52:46,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2020-10-20 00:52:46,708 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 21 [2020-10-20 00:52:46,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:52:46,708 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2020-10-20 00:52:46,709 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-20 00:52:46,709 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2020-10-20 00:52:46,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-20 00:52:46,710 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:52:46,710 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:52:46,711 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-20 00:52:46,711 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:52:46,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:52:46,712 INFO L82 PathProgramCache]: Analyzing trace with hash 1392750941, now seen corresponding path program 1 times [2020-10-20 00:52:46,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:52:46,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513717684] [2020-10-20 00:52:46,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:52:46,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:52:46,812 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:52:46,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513717684] [2020-10-20 00:52:46,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079731966] [2020-10-20 00:52:46,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 00:52:46,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:52:46,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-20 00:52:46,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:52:46,981 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:52:46,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 00:52:46,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-10-20 00:52:46,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793765872] [2020-10-20 00:52:46,983 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-20 00:52:46,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:52:46,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-20 00:52:46,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-20 00:52:46,984 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand 5 states. [2020-10-20 00:52:47,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:52:47,023 INFO L93 Difference]: Finished difference Result 57 states and 76 transitions. [2020-10-20 00:52:47,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 00:52:47,024 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-10-20 00:52:47,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:52:47,025 INFO L225 Difference]: With dead ends: 57 [2020-10-20 00:52:47,025 INFO L226 Difference]: Without dead ends: 40 [2020-10-20 00:52:47,026 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-20 00:52:47,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-20 00:52:47,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 34. [2020-10-20 00:52:47,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-20 00:52:47,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 44 transitions. [2020-10-20 00:52:47,032 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 44 transitions. Word has length 21 [2020-10-20 00:52:47,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:52:47,033 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 44 transitions. [2020-10-20 00:52:47,033 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-20 00:52:47,033 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 44 transitions. [2020-10-20 00:52:47,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-20 00:52:47,034 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:52:47,035 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:52:47,237 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 00:52:47,238 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:52:47,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:52:47,239 INFO L82 PathProgramCache]: Analyzing trace with hash -782990510, now seen corresponding path program 1 times [2020-10-20 00:52:47,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:52:47,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465510855] [2020-10-20 00:52:47,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:52:47,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:52:47,417 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:52:47,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465510855] [2020-10-20 00:52:47,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023372684] [2020-10-20 00:52:47,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 00:52:47,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:52:47,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-20 00:52:47,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:52:47,546 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:52:47,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 00:52:47,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-20 00:52:47,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889594857] [2020-10-20 00:52:47,547 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-20 00:52:47,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:52:47,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-20 00:52:47,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-20 00:52:47,548 INFO L87 Difference]: Start difference. First operand 34 states and 44 transitions. Second operand 6 states. [2020-10-20 00:52:47,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:52:47,600 INFO L93 Difference]: Finished difference Result 64 states and 85 transitions. [2020-10-20 00:52:47,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-20 00:52:47,601 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2020-10-20 00:52:47,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:52:47,602 INFO L225 Difference]: With dead ends: 64 [2020-10-20 00:52:47,602 INFO L226 Difference]: Without dead ends: 47 [2020-10-20 00:52:47,603 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-20 00:52:47,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-20 00:52:47,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 41. [2020-10-20 00:52:47,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-20 00:52:47,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 53 transitions. [2020-10-20 00:52:47,609 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 53 transitions. Word has length 28 [2020-10-20 00:52:47,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:52:47,609 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 53 transitions. [2020-10-20 00:52:47,609 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-20 00:52:47,609 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 53 transitions. [2020-10-20 00:52:47,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-20 00:52:47,610 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:52:47,610 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:52:47,823 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 00:52:47,824 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:52:47,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:52:47,825 INFO L82 PathProgramCache]: Analyzing trace with hash -651787331, now seen corresponding path program 2 times [2020-10-20 00:52:47,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:52:47,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739251807] [2020-10-20 00:52:47,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:52:47,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:52:47,951 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:52:47,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739251807] [2020-10-20 00:52:47,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496679632] [2020-10-20 00:52:47,952 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 00:52:48,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-20 00:52:48,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 00:52:48,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-20 00:52:48,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:52:48,099 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:52:48,100 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 00:52:48,100 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-20 00:52:48,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562856662] [2020-10-20 00:52:48,101 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-20 00:52:48,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:52:48,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-20 00:52:48,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-20 00:52:48,102 INFO L87 Difference]: Start difference. First operand 41 states and 53 transitions. Second operand 7 states. [2020-10-20 00:52:48,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:52:48,161 INFO L93 Difference]: Finished difference Result 71 states and 94 transitions. [2020-10-20 00:52:48,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-20 00:52:48,179 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 35 [2020-10-20 00:52:48,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:52:48,180 INFO L225 Difference]: With dead ends: 71 [2020-10-20 00:52:48,181 INFO L226 Difference]: Without dead ends: 54 [2020-10-20 00:52:48,181 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-20 00:52:48,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-20 00:52:48,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2020-10-20 00:52:48,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-20 00:52:48,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 62 transitions. [2020-10-20 00:52:48,188 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 62 transitions. Word has length 35 [2020-10-20 00:52:48,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:52:48,189 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 62 transitions. [2020-10-20 00:52:48,189 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-20 00:52:48,189 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 62 transitions. [2020-10-20 00:52:48,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-20 00:52:48,191 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:52:48,191 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:52:48,405 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 00:52:48,406 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:52:48,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:52:48,407 INFO L82 PathProgramCache]: Analyzing trace with hash 741491954, now seen corresponding path program 3 times [2020-10-20 00:52:48,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:52:48,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771026140] [2020-10-20 00:52:48,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:52:48,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:52:48,509 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:52:48,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771026140] [2020-10-20 00:52:48,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512610530] [2020-10-20 00:52:48,510 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 00:52:50,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-20 00:52:50,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 00:52:50,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-20 00:52:50,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:52:50,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-20 00:52:50,738 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2020-10-20 00:52:50,739 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-20 00:52:50,754 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 00:52:50,755 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-20 00:52:50,756 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:23 [2020-10-20 00:52:50,809 INFO L441 ElimStorePlain]: Different costs {2=[|v_#memory_int_18|], 10=[|v_#memory_int_20|]} [2020-10-20 00:52:50,817 INFO L545 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-20 00:52:50,837 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 00:52:50,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-20 00:52:50,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-20 00:52:50,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-20 00:52:50,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-20 00:52:50,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-20 00:52:50,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-20 00:52:50,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-20 00:52:50,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-20 00:52:50,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-20 00:52:50,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-20 00:52:50,862 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 00:52:50,862 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 41 [2020-10-20 00:52:50,864 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-10-20 00:52:50,897 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 00:52:50,901 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-20 00:52:50,903 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:66, output treesize:23 [2020-10-20 00:52:50,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-20 00:52:50,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-20 00:52:50,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-20 00:52:50,946 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 00:52:50,946 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 23 [2020-10-20 00:52:50,948 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-20 00:52:50,958 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 00:52:50,961 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-20 00:52:50,961 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:42, output treesize:20 [2020-10-20 00:52:51,065 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-20 00:52:51,097 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 30 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-20 00:52:51,098 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 00:52:51,098 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11] total 16 [2020-10-20 00:52:51,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379956756] [2020-10-20 00:52:51,101 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-20 00:52:51,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:52:51,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-20 00:52:51,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2020-10-20 00:52:51,105 INFO L87 Difference]: Start difference. First operand 48 states and 62 transitions. Second operand 16 states. [2020-10-20 00:52:52,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:52:52,107 INFO L93 Difference]: Finished difference Result 87 states and 116 transitions. [2020-10-20 00:52:52,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-20 00:52:52,108 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 42 [2020-10-20 00:52:52,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:52:52,110 INFO L225 Difference]: With dead ends: 87 [2020-10-20 00:52:52,110 INFO L226 Difference]: Without dead ends: 70 [2020-10-20 00:52:52,111 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=222, Invalid=708, Unknown=0, NotChecked=0, Total=930 [2020-10-20 00:52:52,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-20 00:52:52,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 58. [2020-10-20 00:52:52,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-20 00:52:52,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 75 transitions. [2020-10-20 00:52:52,119 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 75 transitions. Word has length 42 [2020-10-20 00:52:52,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:52:52,120 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 75 transitions. [2020-10-20 00:52:52,120 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-20 00:52:52,120 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 75 transitions. [2020-10-20 00:52:52,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-20 00:52:52,121 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:52:52,122 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:52:52,335 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 00:52:52,336 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:52:52,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:52:52,337 INFO L82 PathProgramCache]: Analyzing trace with hash 352724127, now seen corresponding path program 1 times [2020-10-20 00:52:52,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:52:52,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106539666] [2020-10-20 00:52:52,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:52:52,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:52:52,677 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 44 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-20 00:52:52,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106539666] [2020-10-20 00:52:52,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544477345] [2020-10-20 00:52:52,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 00:52:52,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:52:52,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 36 conjunts are in the unsatisfiable core [2020-10-20 00:52:52,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:52:52,813 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-10-20 00:52:52,814 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-20 00:52:52,816 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 00:52:52,817 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-10-20 00:52:52,817 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2020-10-20 00:52:52,832 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 00:52:52,832 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2020-10-20 00:52:52,834 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-20 00:52:52,837 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 00:52:52,837 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-10-20 00:52:52,837 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:4 [2020-10-20 00:52:52,874 INFO L350 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2020-10-20 00:52:52,875 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 17 [2020-10-20 00:52:52,875 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-20 00:52:52,885 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 00:52:52,885 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-20 00:52:52,885 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:21 [2020-10-20 00:52:52,912 INFO L441 ElimStorePlain]: Different costs {2=[|v_#memory_int_22|], 10=[|v_#memory_int_24|]} [2020-10-20 00:52:52,915 INFO L545 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-20 00:52:52,934 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 00:52:52,999 INFO L350 Elim1Store]: treesize reduction 288, result has 10.8 percent of original size [2020-10-20 00:52:53,000 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 5 case distinctions, treesize of input 46 treesize of output 41 [2020-10-20 00:52:53,001 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-10-20 00:52:53,012 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 00:52:53,014 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-20 00:52:53,014 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:64, output treesize:21 [2020-10-20 00:52:53,028 INFO L350 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2020-10-20 00:52:53,028 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 23 [2020-10-20 00:52:53,030 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-20 00:52:53,041 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 00:52:53,042 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-20 00:52:53,043 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:40, output treesize:17 [2020-10-20 00:52:53,157 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-20 00:52:53,164 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 44 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-20 00:52:53,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 00:52:53,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2020-10-20 00:52:53,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435606765] [2020-10-20 00:52:53,166 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-20 00:52:53,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:52:53,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-20 00:52:53,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2020-10-20 00:52:53,166 INFO L87 Difference]: Start difference. First operand 58 states and 75 transitions. Second operand 18 states. [2020-10-20 00:52:54,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:52:54,292 INFO L93 Difference]: Finished difference Result 95 states and 124 transitions. [2020-10-20 00:52:54,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-20 00:52:54,293 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 49 [2020-10-20 00:52:54,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:52:54,294 INFO L225 Difference]: With dead ends: 95 [2020-10-20 00:52:54,294 INFO L226 Difference]: Without dead ends: 80 [2020-10-20 00:52:54,296 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=187, Invalid=683, Unknown=0, NotChecked=0, Total=870 [2020-10-20 00:52:54,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-20 00:52:54,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 60. [2020-10-20 00:52:54,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-20 00:52:54,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 77 transitions. [2020-10-20 00:52:54,303 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 77 transitions. Word has length 49 [2020-10-20 00:52:54,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:52:54,304 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 77 transitions. [2020-10-20 00:52:54,304 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-20 00:52:54,304 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 77 transitions. [2020-10-20 00:52:54,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-20 00:52:54,305 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:52:54,305 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:52:54,518 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 00:52:54,519 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:52:54,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:52:54,519 INFO L82 PathProgramCache]: Analyzing trace with hash 354571169, now seen corresponding path program 1 times [2020-10-20 00:52:54,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:52:54,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147730553] [2020-10-20 00:52:54,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:52:54,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 00:52:54,590 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 00:52:54,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 00:52:54,664 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 00:52:54,714 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 00:52:54,715 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-20 00:52:54,716 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-20 00:52:54,794 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 12:52:54 BoogieIcfgContainer [2020-10-20 00:52:54,794 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-20 00:52:54,795 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 00:52:54,795 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 00:52:54,795 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 00:52:54,796 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:52:46" (3/4) ... [2020-10-20 00:52:54,798 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-10-20 00:52:54,869 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-20 00:52:54,869 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 00:52:54,871 INFO L168 Benchmark]: Toolchain (without parser) took 10173.91 ms. Allocated memory was 41.4 MB in the beginning and 76.5 MB in the end (delta: 35.1 MB). Free memory was 18.4 MB in the beginning and 40.9 MB in the end (delta: -22.5 MB). Peak memory consumption was 12.7 MB. Max. memory is 14.3 GB. [2020-10-20 00:52:54,872 INFO L168 Benchmark]: CDTParser took 1.23 ms. Allocated memory is still 31.5 MB. Free memory was 7.7 MB in the beginning and 7.6 MB in the end (delta: 45.7 kB). Peak memory consumption was 45.7 kB. Max. memory is 14.3 GB. [2020-10-20 00:52:54,873 INFO L168 Benchmark]: CACSL2BoogieTranslator took 734.44 ms. Allocated memory was 41.4 MB in the beginning and 43.5 MB in the end (delta: 2.1 MB). Free memory was 17.6 MB in the beginning and 23.0 MB in the end (delta: -5.4 MB). Peak memory consumption was 9.1 MB. Max. memory is 14.3 GB. [2020-10-20 00:52:54,873 INFO L168 Benchmark]: Boogie Procedure Inliner took 69.48 ms. Allocated memory is still 43.5 MB. Free memory was 23.0 MB in the beginning and 20.8 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.2 MB. Max. memory is 14.3 GB. [2020-10-20 00:52:54,874 INFO L168 Benchmark]: Boogie Preprocessor took 37.54 ms. Allocated memory is still 43.5 MB. Free memory was 20.8 MB in the beginning and 18.9 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 14.3 GB. [2020-10-20 00:52:54,875 INFO L168 Benchmark]: RCFGBuilder took 509.10 ms. Allocated memory was 43.5 MB in the beginning and 44.0 MB in the end (delta: 524.3 kB). Free memory was 18.9 MB in the beginning and 13.5 MB in the end (delta: 5.4 MB). Peak memory consumption was 9.8 MB. Max. memory is 14.3 GB. [2020-10-20 00:52:54,875 INFO L168 Benchmark]: TraceAbstraction took 8738.25 ms. Allocated memory was 44.0 MB in the beginning and 76.5 MB in the end (delta: 32.5 MB). Free memory was 13.3 MB in the beginning and 46.8 MB in the end (delta: -33.6 MB). Peak memory consumption was 39.5 MB. Max. memory is 14.3 GB. [2020-10-20 00:52:54,876 INFO L168 Benchmark]: Witness Printer took 74.35 ms. Allocated memory is still 76.5 MB. Free memory was 46.8 MB in the beginning and 40.9 MB in the end (delta: 5.9 MB). Peak memory consumption was 5.9 MB. Max. memory is 14.3 GB. [2020-10-20 00:52:54,884 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.23 ms. Allocated memory is still 31.5 MB. Free memory was 7.7 MB in the beginning and 7.6 MB in the end (delta: 45.7 kB). Peak memory consumption was 45.7 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 734.44 ms. Allocated memory was 41.4 MB in the beginning and 43.5 MB in the end (delta: 2.1 MB). Free memory was 17.6 MB in the beginning and 23.0 MB in the end (delta: -5.4 MB). Peak memory consumption was 9.1 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 69.48 ms. Allocated memory is still 43.5 MB. Free memory was 23.0 MB in the beginning and 20.8 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.2 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 37.54 ms. Allocated memory is still 43.5 MB. Free memory was 20.8 MB in the beginning and 18.9 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 14.3 GB. * RCFGBuilder took 509.10 ms. Allocated memory was 43.5 MB in the beginning and 44.0 MB in the end (delta: 524.3 kB). Free memory was 18.9 MB in the beginning and 13.5 MB in the end (delta: 5.4 MB). Peak memory consumption was 9.8 MB. Max. memory is 14.3 GB. * TraceAbstraction took 8738.25 ms. Allocated memory was 44.0 MB in the beginning and 76.5 MB in the end (delta: 32.5 MB). Free memory was 13.3 MB in the beginning and 46.8 MB in the end (delta: -33.6 MB). Peak memory consumption was 39.5 MB. Max. memory is 14.3 GB. * Witness Printer took 74.35 ms. Allocated memory is still 76.5 MB. Free memory was 46.8 MB in the beginning and 40.9 MB in the end (delta: 5.9 MB). Peak memory consumption was 5.9 MB. Max. memory is 14.3 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: [L599] const int len = 5; [L579] DLL head = ((void *)0); [L580] COND TRUE len > 0 [L581] DLL new_head = (DLL) malloc(sizeof(struct node)); [L582] COND FALSE !(((void *)0) == new_head) [L585] new_head->data_0 = 0 [L586] new_head->data_1 = 0 [L587] EXPR __VERIFIER_nondet_int() == len? 1 : 0 [L587] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L588] new_head->next = head [L589] new_head->prev = ((void *)0) [L590] COND FALSE !(\read(head)) [L593] head = new_head [L594] len-- [L580] COND TRUE len > 0 [L581] DLL new_head = (DLL) malloc(sizeof(struct node)); [L582] COND FALSE !(((void *)0) == new_head) [L585] new_head->data_0 = 0 [L586] new_head->data_1 = 0 [L587] EXPR __VERIFIER_nondet_int() == len? 1 : 0 [L587] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L588] new_head->next = head [L589] new_head->prev = ((void *)0) [L590] COND TRUE \read(head) [L591] head->prev = new_head [L593] head = new_head [L594] len-- [L580] COND TRUE len > 0 [L581] DLL new_head = (DLL) malloc(sizeof(struct node)); [L582] COND FALSE !(((void *)0) == new_head) [L585] new_head->data_0 = 0 [L586] new_head->data_1 = 0 [L587] EXPR __VERIFIER_nondet_int() == len? 1 : 0 [L587] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L588] new_head->next = head [L589] new_head->prev = ((void *)0) [L590] COND TRUE \read(head) [L591] head->prev = new_head [L593] head = new_head [L594] len-- [L580] COND TRUE len > 0 [L581] DLL new_head = (DLL) malloc(sizeof(struct node)); [L582] COND FALSE !(((void *)0) == new_head) [L585] new_head->data_0 = 0 [L586] new_head->data_1 = 0 [L587] EXPR __VERIFIER_nondet_int() == len? 1 : 0 [L587] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L588] new_head->next = head [L589] new_head->prev = ((void *)0) [L590] COND TRUE \read(head) [L591] head->prev = new_head [L593] head = new_head [L594] len-- [L580] COND TRUE len > 0 [L581] DLL new_head = (DLL) malloc(sizeof(struct node)); [L582] COND FALSE !(((void *)0) == new_head) [L585] new_head->data_0 = 0 [L586] new_head->data_1 = 0 [L587] EXPR __VERIFIER_nondet_int() == len? 1 : 0 [L587] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L588] new_head->next = head [L589] new_head->prev = ((void *)0) [L590] COND TRUE \read(head) [L591] head->prev = new_head [L593] head = new_head [L594] len-- [L580] COND FALSE !(len > 0) [L596] return head; [L600] DLL head = dll_create(len); [L601] head->next [L601] COND TRUE head->next [L602] EXPR head->data_0 [L602] EXPR 0 != head->data_0 || 0 != head->data_1 [L602] EXPR head->data_1 [L602] EXPR 0 != head->data_0 || 0 != head->data_1 [L602] 0 != head->data_0 || 0 != head->data_1 || 0 != head->data_2 [L602] EXPR head->data_2 [L602] 0 != head->data_0 || 0 != head->data_1 || 0 != head->data_2 [L602] COND TRUE 0 != head->data_0 || 0 != head->data_1 || 0 != head->data_2 [L12] COND FALSE !(0) [L12] __assert_fail ("0", "dll_nullified-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: 8.6s, OverallIterations: 9, TraceHistogramMax: 5, AutomataDifference: 2.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 234 SDtfs, 825 SDslu, 564 SDs, 0 SdLazy, 611 SolverSat, 179 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 251 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 1.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=60occurred in iteration=8, 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, 8 MinimizatonAttempts, 57 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 2.5s SatisfiabilityAnalysisTime, 1.7s InterpolantComputationTime, 448 NumberOfCodeBlocks, 441 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 386 ConstructedInterpolants, 0 QuantifiedInterpolants, 48285 SizeOfPredicates, 43 NumberOfNonLiveVariables, 872 ConjunctsInSsa, 79 ConjunctsInUnsatCore, 13 InterpolantComputations, 3 PerfectInterpolantSequences, 176/311 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...