./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/list-simple/sll2n_append_equal.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-simple/sll2n_append_equal.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 c6d236a55b5c67d19e4c45c0ae95f681ece2bebf ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis 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-simple/sll2n_append_equal.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.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 c6d236a55b5c67d19e4c45c0ae95f681ece2bebf ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN --- Real Ultimate output --- This is Ultimate 0.1.25-9a8b2e8 [2020-10-20 00:50:58,291 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 00:50:58,294 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 00:50:58,330 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 00:50:58,331 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 00:50:58,341 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 00:50:58,344 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 00:50:58,348 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 00:50:58,351 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 00:50:58,354 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 00:50:58,356 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 00:50:58,359 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 00:50:58,359 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 00:50:58,364 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 00:50:58,366 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 00:50:58,368 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 00:50:58,370 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 00:50:58,372 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 00:50:58,374 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 00:50:58,382 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 00:50:58,385 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 00:50:58,387 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 00:50:58,389 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 00:50:58,390 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 00:50:58,403 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 00:50:58,406 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 00:50:58,406 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 00:50:58,408 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 00:50:58,409 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 00:50:58,412 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 00:50:58,414 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 00:50:58,415 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 00:50:58,416 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 00:50:58,420 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 00:50:58,421 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 00:50:58,424 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 00:50:58,425 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 00:50:58,425 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 00:50:58,426 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 00:50:58,427 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 00:50:58,428 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 00:50:58,430 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-20 00:50:58,484 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 00:50:58,485 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 00:50:58,487 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 00:50:58,488 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 00:50:58,488 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 00:50:58,489 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 00:50:58,489 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-20 00:50:58,489 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-20 00:50:58,489 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-20 00:50:58,490 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 00:50:58,491 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-20 00:50:58,491 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-20 00:50:58,492 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-20 00:50:58,492 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-20 00:50:58,493 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-20 00:50:58,493 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 00:50:58,493 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-20 00:50:58,493 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 00:50:58,494 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 00:50:58,494 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-20 00:50:58,495 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-20 00:50:58,495 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 00:50:58,495 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 00:50:58,495 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-20 00:50:58,496 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-20 00:50:58,496 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-20 00:50:58,496 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-20 00:50:58,496 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-20 00:50:58,497 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 00:50:58,497 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 -> c6d236a55b5c67d19e4c45c0ae95f681ece2bebf [2020-10-20 00:50:58,724 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 00:50:58,739 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 00:50:58,743 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 00:50:58,745 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 00:50:58,746 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 00:50:58,747 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-simple/sll2n_append_equal.i [2020-10-20 00:50:58,816 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/adf965f47/5fade82e9a50432483ddd6011d63b4db/FLAGe0fe92036 [2020-10-20 00:50:59,538 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 00:50:59,543 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/sll2n_append_equal.i [2020-10-20 00:50:59,570 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/adf965f47/5fade82e9a50432483ddd6011d63b4db/FLAGe0fe92036 [2020-10-20 00:50:59,833 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/adf965f47/5fade82e9a50432483ddd6011d63b4db [2020-10-20 00:50:59,839 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 00:50:59,846 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-20 00:50:59,850 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 00:50:59,850 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 00:50:59,855 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 00:50:59,856 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:50:59" (1/1) ... [2020-10-20 00:50:59,860 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7aed0c80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:50:59, skipping insertion in model container [2020-10-20 00:50:59,861 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:50:59" (1/1) ... [2020-10-20 00:50:59,869 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 00:50:59,907 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 00:51:00,300 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:51:00,319 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 00:51:00,396 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:51:00,460 INFO L208 MainTranslator]: Completed translation [2020-10-20 00:51:00,460 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:51:00 WrapperNode [2020-10-20 00:51:00,461 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 00:51:00,462 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-20 00:51:00,462 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-20 00:51:00,462 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-20 00:51:00,472 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:51:00" (1/1) ... [2020-10-20 00:51:00,489 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:51:00" (1/1) ... [2020-10-20 00:51:00,523 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-20 00:51:00,524 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 00:51:00,524 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 00:51:00,524 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 00:51:00,535 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:51:00" (1/1) ... [2020-10-20 00:51:00,535 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:51:00" (1/1) ... [2020-10-20 00:51:00,540 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:51:00" (1/1) ... [2020-10-20 00:51:00,540 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:51:00" (1/1) ... [2020-10-20 00:51:00,550 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:51:00" (1/1) ... [2020-10-20 00:51:00,556 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:51:00" (1/1) ... [2020-10-20 00:51:00,559 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:51:00" (1/1) ... [2020-10-20 00:51:00,563 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 00:51:00,564 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 00:51:00,564 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 00:51:00,564 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 00:51:00,565 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:51:00" (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 00:51:00,660 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-20 00:51:00,660 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-20 00:51:00,661 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-20 00:51:00,662 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-20 00:51:00,662 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-20 00:51:00,662 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-20 00:51:00,662 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-20 00:51:00,662 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-10-20 00:51:00,663 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-20 00:51:00,664 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 00:51:00,664 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 00:51:01,134 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 00:51:01,135 INFO L298 CfgBuilder]: Removed 24 assume(true) statements. [2020-10-20 00:51:01,137 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:51:01 BoogieIcfgContainer [2020-10-20 00:51:01,138 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 00:51:01,139 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-20 00:51:01,139 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-20 00:51:01,143 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-20 00:51:01,144 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 12:50:59" (1/3) ... [2020-10-20 00:51:01,145 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a2e7c9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:51:01, skipping insertion in model container [2020-10-20 00:51:01,145 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:51:00" (2/3) ... [2020-10-20 00:51:01,146 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a2e7c9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:51:01, skipping insertion in model container [2020-10-20 00:51:01,146 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:51:01" (3/3) ... [2020-10-20 00:51:01,148 INFO L111 eAbstractionObserver]: Analyzing ICFG sll2n_append_equal.i [2020-10-20 00:51:01,162 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-20 00:51:01,172 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-20 00:51:01,203 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-20 00:51:01,234 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-20 00:51:01,234 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-20 00:51:01,234 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-20 00:51:01,235 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 00:51:01,235 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 00:51:01,235 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-20 00:51:01,235 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 00:51:01,235 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-20 00:51:01,254 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-10-20 00:51:01,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-20 00:51:01,263 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:51:01,264 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:51:01,265 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:51:01,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:51:01,272 INFO L82 PathProgramCache]: Analyzing trace with hash -1429829387, now seen corresponding path program 1 times [2020-10-20 00:51:01,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:51:01,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608302534] [2020-10-20 00:51:01,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:51:01,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:51:01,465 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 00:51:01,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608302534] [2020-10-20 00:51:01,467 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:51:01,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-20 00:51:01,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691396052] [2020-10-20 00:51:01,474 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-20 00:51:01,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:51:01,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-20 00:51:01,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-20 00:51:01,491 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 2 states. [2020-10-20 00:51:01,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:51:01,510 INFO L93 Difference]: Finished difference Result 55 states and 78 transitions. [2020-10-20 00:51:01,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-20 00:51:01,511 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 15 [2020-10-20 00:51:01,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:51:01,521 INFO L225 Difference]: With dead ends: 55 [2020-10-20 00:51:01,522 INFO L226 Difference]: Without dead ends: 24 [2020-10-20 00:51:01,525 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 00:51:01,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-20 00:51:01,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-20 00:51:01,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-20 00:51:01,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2020-10-20 00:51:01,561 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 15 [2020-10-20 00:51:01,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:51:01,561 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2020-10-20 00:51:01,561 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-20 00:51:01,562 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2020-10-20 00:51:01,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-20 00:51:01,562 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:51:01,563 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:51:01,563 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-20 00:51:01,563 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:51:01,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:51:01,564 INFO L82 PathProgramCache]: Analyzing trace with hash -1030348571, now seen corresponding path program 1 times [2020-10-20 00:51:01,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:51:01,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348593130] [2020-10-20 00:51:01,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:51:01,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:51:01,661 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 00:51:01,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348593130] [2020-10-20 00:51:01,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:51:01,662 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-20 00:51:01,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238743786] [2020-10-20 00:51:01,665 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-20 00:51:01,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:51:01,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-20 00:51:01,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-20 00:51:01,666 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 3 states. [2020-10-20 00:51:01,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:51:01,691 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2020-10-20 00:51:01,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-20 00:51:01,692 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-10-20 00:51:01,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:51:01,694 INFO L225 Difference]: With dead ends: 46 [2020-10-20 00:51:01,694 INFO L226 Difference]: Without dead ends: 29 [2020-10-20 00:51:01,696 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 00:51:01,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-20 00:51:01,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 25. [2020-10-20 00:51:01,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-20 00:51:01,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2020-10-20 00:51:01,703 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 15 [2020-10-20 00:51:01,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:51:01,703 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2020-10-20 00:51:01,704 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-20 00:51:01,704 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2020-10-20 00:51:01,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-20 00:51:01,705 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:51:01,705 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] [2020-10-20 00:51:01,706 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-20 00:51:01,706 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:51:01,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:51:01,706 INFO L82 PathProgramCache]: Analyzing trace with hash -939763587, now seen corresponding path program 1 times [2020-10-20 00:51:01,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:51:01,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005747596] [2020-10-20 00:51:01,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:51:01,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:51:01,832 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 00:51:01,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005747596] [2020-10-20 00:51:01,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694878512] [2020-10-20 00:51:01,833 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 00:51:01,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:51:01,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-20 00:51:01,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:51:02,029 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 00:51:02,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 00:51:02,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-10-20 00:51:02,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909459972] [2020-10-20 00:51:02,031 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-20 00:51:02,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:51:02,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-20 00:51:02,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-20 00:51:02,033 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 5 states. [2020-10-20 00:51:02,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:51:02,063 INFO L93 Difference]: Finished difference Result 47 states and 55 transitions. [2020-10-20 00:51:02,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 00:51:02,064 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-10-20 00:51:02,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:51:02,065 INFO L225 Difference]: With dead ends: 47 [2020-10-20 00:51:02,065 INFO L226 Difference]: Without dead ends: 30 [2020-10-20 00:51:02,066 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 20 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 00:51:02,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-20 00:51:02,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-10-20 00:51:02,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-20 00:51:02,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-10-20 00:51:02,073 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 20 [2020-10-20 00:51:02,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:51:02,073 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-10-20 00:51:02,073 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-20 00:51:02,074 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-10-20 00:51:02,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-20 00:51:02,075 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:51:02,075 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:51:02,283 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-10-20 00:51:02,284 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:51:02,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:51:02,286 INFO L82 PathProgramCache]: Analyzing trace with hash 272703461, now seen corresponding path program 2 times [2020-10-20 00:51:02,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:51:02,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340584181] [2020-10-20 00:51:02,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:51:02,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:51:02,504 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-20 00:51:02,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340584181] [2020-10-20 00:51:02,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:51:02,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-20 00:51:02,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84713973] [2020-10-20 00:51:02,506 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-20 00:51:02,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:51:02,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-20 00:51:02,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-20 00:51:02,507 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 8 states. [2020-10-20 00:51:02,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:51:02,721 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2020-10-20 00:51:02,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-20 00:51:02,722 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2020-10-20 00:51:02,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:51:02,724 INFO L225 Difference]: With dead ends: 49 [2020-10-20 00:51:02,724 INFO L226 Difference]: Without dead ends: 44 [2020-10-20 00:51:02,725 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-10-20 00:51:02,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-20 00:51:02,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 32. [2020-10-20 00:51:02,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-20 00:51:02,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2020-10-20 00:51:02,734 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 25 [2020-10-20 00:51:02,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:51:02,734 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2020-10-20 00:51:02,735 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-20 00:51:02,735 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2020-10-20 00:51:02,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-20 00:51:02,736 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:51:02,736 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:51:02,737 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-20 00:51:02,737 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:51:02,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:51:02,737 INFO L82 PathProgramCache]: Analyzing trace with hash 274312175, now seen corresponding path program 1 times [2020-10-20 00:51:02,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:51:02,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675183908] [2020-10-20 00:51:02,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:51:02,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:51:02,985 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-20 00:51:02,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675183908] [2020-10-20 00:51:02,985 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:51:02,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-20 00:51:02,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443589054] [2020-10-20 00:51:02,988 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-20 00:51:02,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:51:02,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-20 00:51:02,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-20 00:51:02,991 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 10 states. [2020-10-20 00:51:03,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:51:03,230 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2020-10-20 00:51:03,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-20 00:51:03,231 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 25 [2020-10-20 00:51:03,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:51:03,232 INFO L225 Difference]: With dead ends: 39 [2020-10-20 00:51:03,232 INFO L226 Difference]: Without dead ends: 30 [2020-10-20 00:51:03,233 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2020-10-20 00:51:03,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-20 00:51:03,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-10-20 00:51:03,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-20 00:51:03,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2020-10-20 00:51:03,241 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 25 [2020-10-20 00:51:03,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:51:03,241 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2020-10-20 00:51:03,241 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-20 00:51:03,242 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2020-10-20 00:51:03,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-20 00:51:03,243 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:51:03,243 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:51:03,243 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-20 00:51:03,244 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:51:03,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:51:03,244 INFO L82 PathProgramCache]: Analyzing trace with hash 824998241, now seen corresponding path program 1 times [2020-10-20 00:51:03,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:51:03,245 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859704115] [2020-10-20 00:51:03,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:51:03,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:51:03,550 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-20 00:51:03,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859704115] [2020-10-20 00:51:03,551 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:51:03,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-10-20 00:51:03,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908653473] [2020-10-20 00:51:03,553 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-20 00:51:03,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:51:03,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-20 00:51:03,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-20 00:51:03,561 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 12 states. [2020-10-20 00:51:04,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:51:04,064 INFO L93 Difference]: Finished difference Result 52 states and 57 transitions. [2020-10-20 00:51:04,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-20 00:51:04,066 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2020-10-20 00:51:04,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:51:04,067 INFO L225 Difference]: With dead ends: 52 [2020-10-20 00:51:04,068 INFO L226 Difference]: Without dead ends: 47 [2020-10-20 00:51:04,068 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2020-10-20 00:51:04,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-20 00:51:04,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 35. [2020-10-20 00:51:04,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-20 00:51:04,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-10-20 00:51:04,081 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 28 [2020-10-20 00:51:04,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:51:04,082 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-10-20 00:51:04,082 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-20 00:51:04,082 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-10-20 00:51:04,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-20 00:51:04,083 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:51:04,084 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:51:04,084 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-20 00:51:04,084 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:51:04,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:51:04,085 INFO L82 PathProgramCache]: Analyzing trace with hash 826606955, now seen corresponding path program 1 times [2020-10-20 00:51:04,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:51:04,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569482907] [2020-10-20 00:51:04,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:51:04,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:51:04,605 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-20 00:51:04,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569482907] [2020-10-20 00:51:04,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232329597] [2020-10-20 00:51:04,607 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 00:51:05,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:51:05,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 83 conjunts are in the unsatisfiable core [2020-10-20 00:51:05,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:51:05,248 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 00:51:05,248 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-20 00:51:05,258 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 00:51:05,259 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-10-20 00:51:05,259 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:19 [2020-10-20 00:51:05,359 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 13 treesize of output 9 [2020-10-20 00:51:05,360 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-20 00:51:05,370 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 00:51:05,373 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-20 00:51:05,373 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:25 [2020-10-20 00:51:05,529 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 00:51:05,530 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 15 treesize of output 19 [2020-10-20 00:51:05,530 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-20 00:51:05,542 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 00:51:05,542 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-10-20 00:51:05,543 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:39 [2020-10-20 00:51:05,605 INFO L441 ElimStorePlain]: Different costs {4=[|v_#memory_$Pointer$.offset_22|], 7=[|v_#memory_$Pointer$.base_23|]} [2020-10-20 00:51:05,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-20 00:51:05,614 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 18 [2020-10-20 00:51:05,615 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-20 00:51:05,634 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 00:51:05,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-20 00:51:05,652 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 00:51:05,653 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 49 [2020-10-20 00:51:05,657 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 00:51:05,661 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-10-20 00:51:05,694 INFO L625 ElimStorePlain]: treesize reduction 36, result has 55.6 percent of original size [2020-10-20 00:51:05,696 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-20 00:51:05,697 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:75, output treesize:45 [2020-10-20 00:51:05,965 INFO L441 ElimStorePlain]: Different costs {4=[|#memory_$Pointer$.offset|], 7=[|#memory_$Pointer$.base|]} [2020-10-20 00:51:05,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-20 00:51:05,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-20 00:51:05,978 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 00:51:05,979 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 44 [2020-10-20 00:51:05,981 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-20 00:51:05,989 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 00:51:05,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-20 00:51:05,997 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 00:51:05,998 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 22 [2020-10-20 00:51:06,000 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-10-20 00:51:06,005 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 00:51:06,007 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-20 00:51:06,007 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:73, output treesize:4 [2020-10-20 00:51:06,041 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:51:06,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 00:51:06,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2020-10-20 00:51:06,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110692614] [2020-10-20 00:51:06,043 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-20 00:51:06,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:51:06,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-20 00:51:06,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=636, Unknown=0, NotChecked=0, Total=702 [2020-10-20 00:51:06,044 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 27 states. [2020-10-20 00:51:07,131 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 70 [2020-10-20 00:51:07,374 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 82 [2020-10-20 00:51:07,701 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 89 [2020-10-20 00:51:08,020 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 100 [2020-10-20 00:51:08,310 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 103 [2020-10-20 00:51:08,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:51:08,508 INFO L93 Difference]: Finished difference Result 44 states and 49 transitions. [2020-10-20 00:51:08,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-20 00:51:08,513 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 28 [2020-10-20 00:51:08,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:51:08,514 INFO L225 Difference]: With dead ends: 44 [2020-10-20 00:51:08,514 INFO L226 Difference]: Without dead ends: 34 [2020-10-20 00:51:08,517 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=318, Invalid=1322, Unknown=0, NotChecked=0, Total=1640 [2020-10-20 00:51:08,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-20 00:51:08,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-10-20 00:51:08,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-20 00:51:08,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-10-20 00:51:08,529 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 28 [2020-10-20 00:51:08,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:51:08,530 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-10-20 00:51:08,530 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-20 00:51:08,530 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-10-20 00:51:08,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-20 00:51:08,531 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:51:08,531 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, 1, 1] [2020-10-20 00:51:08,740 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 00:51:08,741 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:51:08,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:51:08,742 INFO L82 PathProgramCache]: Analyzing trace with hash 187395196, now seen corresponding path program 1 times [2020-10-20 00:51:08,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:51:08,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678860639] [2020-10-20 00:51:08,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:51:08,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:51:08,794 ERROR L253 erpolLogProxyWrapper]: Interpolant 16 not inductive [2020-10-20 00:51:08,801 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-20 00:51:08,802 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: generated interpolants did not pass sanity check at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.getInterpolants(Interpolator.java:219) at de.uni_freiburg.informatik.ultimate.smtinterpol.smtlib2.SMTInterpol.getInterpolants(SMTInterpol.java:876) at de.uni_freiburg.informatik.ultimate.logic.NoopScript.getInterpolants(NoopScript.java:392) at de.uni_freiburg.informatik.ultimate.logic.NoopScript.getInterpolants(NoopScript.java:386) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.getInterpolants(WrapperScript.java:337) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.getInterpolants(WrapperScript.java:337) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.getInterpolants(ManagedScript.java:191) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedInterpolantsBuilder.computeCraigInterpolants(NestedInterpolantsBuilder.java:285) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedInterpolantsBuilder.(NestedInterpolantsBuilder.java:166) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolantsRecursive(InterpolatingTraceCheckCraig.java:326) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolants(InterpolatingTraceCheckCraig.java:228) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.(InterpolatingTraceCheckCraig.java:97) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleCraig.construct(IpTcStrategyModuleCraig.java:79) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleCraig.construct(IpTcStrategyModuleCraig.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:241) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:341) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:182) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:134) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2020-10-20 00:51:08,807 INFO L168 Benchmark]: Toolchain (without parser) took 8966.40 ms. Allocated memory was 41.9 MB in the beginning and 81.3 MB in the end (delta: 39.3 MB). Free memory was 21.0 MB in the beginning and 19.0 MB in the end (delta: 2.0 MB). Peak memory consumption was 41.3 MB. Max. memory is 14.3 GB. [2020-10-20 00:51:08,808 INFO L168 Benchmark]: CDTParser took 0.41 ms. Allocated memory is still 32.0 MB. Free memory was 11.1 MB in the beginning and 11.1 MB in the end (delta: 47.5 kB). Peak memory consumption was 47.5 kB. Max. memory is 14.3 GB. [2020-10-20 00:51:08,809 INFO L168 Benchmark]: CACSL2BoogieTranslator took 611.10 ms. Allocated memory was 41.9 MB in the beginning and 43.5 MB in the end (delta: 1.6 MB). Free memory was 20.2 MB in the beginning and 24.8 MB in the end (delta: -4.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 14.3 GB. [2020-10-20 00:51:08,809 INFO L168 Benchmark]: Boogie Procedure Inliner took 61.86 ms. Allocated memory is still 43.5 MB. Free memory was 24.8 MB in the beginning and 22.5 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.2 MB. Max. memory is 14.3 GB. [2020-10-20 00:51:08,810 INFO L168 Benchmark]: Boogie Preprocessor took 39.94 ms. Allocated memory is still 43.5 MB. Free memory was 22.5 MB in the beginning and 20.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 14.3 GB. [2020-10-20 00:51:08,811 INFO L168 Benchmark]: RCFGBuilder took 574.07 ms. Allocated memory was 43.5 MB in the beginning and 44.0 MB in the end (delta: 524.3 kB). Free memory was 20.4 MB in the beginning and 11.9 MB in the end (delta: 8.5 MB). Peak memory consumption was 11.4 MB. Max. memory is 14.3 GB. [2020-10-20 00:51:08,812 INFO L168 Benchmark]: TraceAbstraction took 7665.97 ms. Allocated memory was 44.0 MB in the beginning and 81.3 MB in the end (delta: 37.2 MB). Free memory was 11.3 MB in the beginning and 19.0 MB in the end (delta: -7.7 MB). Peak memory consumption was 29.6 MB. Max. memory is 14.3 GB. [2020-10-20 00:51:08,817 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.41 ms. Allocated memory is still 32.0 MB. Free memory was 11.1 MB in the beginning and 11.1 MB in the end (delta: 47.5 kB). Peak memory consumption was 47.5 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 611.10 ms. Allocated memory was 41.9 MB in the beginning and 43.5 MB in the end (delta: 1.6 MB). Free memory was 20.2 MB in the beginning and 24.8 MB in the end (delta: -4.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 61.86 ms. Allocated memory is still 43.5 MB. Free memory was 24.8 MB in the beginning and 22.5 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.2 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 39.94 ms. Allocated memory is still 43.5 MB. Free memory was 22.5 MB in the beginning and 20.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 14.3 GB. * RCFGBuilder took 574.07 ms. Allocated memory was 43.5 MB in the beginning and 44.0 MB in the end (delta: 524.3 kB). Free memory was 20.4 MB in the beginning and 11.9 MB in the end (delta: 8.5 MB). Peak memory consumption was 11.4 MB. Max. memory is 14.3 GB. * TraceAbstraction took 7665.97 ms. Allocated memory was 44.0 MB in the beginning and 81.3 MB in the end (delta: 37.2 MB). Free memory was 11.3 MB in the beginning and 19.0 MB in the end (delta: -7.7 MB). Peak memory consumption was 29.6 MB. Max. memory is 14.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: generated interpolants did not pass sanity check de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: generated interpolants did not pass sanity check: de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.getInterpolants(Interpolator.java:219) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... ### Bit-precise run ### This is Ultimate 0.1.25-9a8b2e8 [2020-10-20 00:51:11,068 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 00:51:11,071 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 00:51:11,112 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 00:51:11,113 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 00:51:11,126 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 00:51:11,128 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 00:51:11,130 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 00:51:11,133 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 00:51:11,135 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 00:51:11,137 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 00:51:11,140 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 00:51:11,140 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 00:51:11,145 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 00:51:11,149 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 00:51:11,150 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 00:51:11,151 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 00:51:11,152 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 00:51:11,156 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 00:51:11,162 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 00:51:11,164 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 00:51:11,167 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 00:51:11,169 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 00:51:11,172 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 00:51:11,175 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 00:51:11,176 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 00:51:11,176 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 00:51:11,185 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 00:51:11,186 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 00:51:11,187 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 00:51:11,188 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 00:51:11,188 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 00:51:11,189 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 00:51:11,190 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 00:51:11,192 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 00:51:11,192 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 00:51:11,193 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 00:51:11,193 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 00:51:11,193 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 00:51:11,194 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 00:51:11,195 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 00:51:11,196 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2020-10-20 00:51:11,239 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 00:51:11,239 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 00:51:11,241 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 00:51:11,241 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 00:51:11,242 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 00:51:11,242 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 00:51:11,242 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-20 00:51:11,243 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-20 00:51:11,243 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 00:51:11,243 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-20 00:51:11,244 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-20 00:51:11,245 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-20 00:51:11,245 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-10-20 00:51:11,245 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-10-20 00:51:11,246 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-20 00:51:11,246 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-20 00:51:11,246 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 00:51:11,246 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-20 00:51:11,247 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 00:51:11,247 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 00:51:11,247 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-20 00:51:11,248 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-20 00:51:11,248 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 00:51:11,248 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 00:51:11,248 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-20 00:51:11,249 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-20 00:51:11,249 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2020-10-20 00:51:11,249 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-10-20 00:51:11,249 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-20 00:51:11,250 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 00:51:11,250 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-20 00:51:11,250 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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 -> c6d236a55b5c67d19e4c45c0ae95f681ece2bebf [2020-10-20 00:51:11,467 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 00:51:11,483 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 00:51:11,489 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 00:51:11,491 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 00:51:11,492 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 00:51:11,492 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-simple/sll2n_append_equal.i [2020-10-20 00:51:11,564 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f9551ba72/33ca55a6d61449f8ac3d75bd961f53d4/FLAGc29102932 [2020-10-20 00:51:12,218 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 00:51:12,219 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/sll2n_append_equal.i [2020-10-20 00:51:12,235 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f9551ba72/33ca55a6d61449f8ac3d75bd961f53d4/FLAGc29102932 [2020-10-20 00:51:12,454 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f9551ba72/33ca55a6d61449f8ac3d75bd961f53d4 [2020-10-20 00:51:12,458 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 00:51:12,463 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-20 00:51:12,464 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 00:51:12,464 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 00:51:12,468 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 00:51:12,469 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:51:12" (1/1) ... [2020-10-20 00:51:12,472 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29ebcfb6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:51:12, skipping insertion in model container [2020-10-20 00:51:12,472 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:51:12" (1/1) ... [2020-10-20 00:51:12,480 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 00:51:12,520 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 00:51:12,855 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:51:12,882 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 00:51:12,985 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:51:13,066 INFO L208 MainTranslator]: Completed translation [2020-10-20 00:51:13,067 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:51:13 WrapperNode [2020-10-20 00:51:13,067 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 00:51:13,068 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-20 00:51:13,069 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-20 00:51:13,071 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-20 00:51:13,079 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:51:13" (1/1) ... [2020-10-20 00:51:13,100 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:51:13" (1/1) ... [2020-10-20 00:51:13,140 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-20 00:51:13,140 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 00:51:13,140 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 00:51:13,141 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 00:51:13,148 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:51:13" (1/1) ... [2020-10-20 00:51:13,148 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:51:13" (1/1) ... [2020-10-20 00:51:13,154 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:51:13" (1/1) ... [2020-10-20 00:51:13,154 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:51:13" (1/1) ... [2020-10-20 00:51:13,173 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:51:13" (1/1) ... [2020-10-20 00:51:13,179 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:51:13" (1/1) ... [2020-10-20 00:51:13,182 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:51:13" (1/1) ... [2020-10-20 00:51:13,187 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 00:51:13,190 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 00:51:13,190 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 00:51:13,201 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 00:51:13,202 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:51:13" (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 00:51:13,280 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2020-10-20 00:51:13,281 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-20 00:51:13,281 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-20 00:51:13,281 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-20 00:51:13,281 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-20 00:51:13,281 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-20 00:51:13,281 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2020-10-20 00:51:13,282 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-10-20 00:51:13,282 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-10-20 00:51:13,282 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 00:51:13,282 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 00:51:13,797 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 00:51:13,797 INFO L298 CfgBuilder]: Removed 24 assume(true) statements. [2020-10-20 00:51:13,802 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:51:13 BoogieIcfgContainer [2020-10-20 00:51:13,802 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 00:51:13,803 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-20 00:51:13,804 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-20 00:51:13,807 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-20 00:51:13,807 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 12:51:12" (1/3) ... [2020-10-20 00:51:13,808 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50789054 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:51:13, skipping insertion in model container [2020-10-20 00:51:13,809 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:51:13" (2/3) ... [2020-10-20 00:51:13,810 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50789054 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:51:13, skipping insertion in model container [2020-10-20 00:51:13,810 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:51:13" (3/3) ... [2020-10-20 00:51:13,812 INFO L111 eAbstractionObserver]: Analyzing ICFG sll2n_append_equal.i [2020-10-20 00:51:13,825 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-20 00:51:13,833 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-20 00:51:13,848 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-20 00:51:13,875 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-20 00:51:13,875 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-20 00:51:13,876 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-20 00:51:13,876 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 00:51:13,876 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 00:51:13,876 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-20 00:51:13,876 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 00:51:13,876 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-20 00:51:13,892 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-10-20 00:51:13,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-20 00:51:13,899 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:51:13,900 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:51:13,901 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:51:13,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:51:13,909 INFO L82 PathProgramCache]: Analyzing trace with hash -1429829387, now seen corresponding path program 1 times [2020-10-20 00:51:13,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-20 00:51:13,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [83085111] [2020-10-20 00:51:13,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2020-10-20 00:51:14,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:51:14,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 1 conjunts are in the unsatisfiable core [2020-10-20 00:51:14,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:51:14,107 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 00:51:14,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-20 00:51:14,114 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 00:51:14,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [83085111] [2020-10-20 00:51:14,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:51:14,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-10-20 00:51:14,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699072396] [2020-10-20 00:51:14,123 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-20 00:51:14,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-20 00:51:14,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-20 00:51:14,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-20 00:51:14,141 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 2 states. [2020-10-20 00:51:14,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:51:14,162 INFO L93 Difference]: Finished difference Result 55 states and 78 transitions. [2020-10-20 00:51:14,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-20 00:51:14,164 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 15 [2020-10-20 00:51:14,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:51:14,173 INFO L225 Difference]: With dead ends: 55 [2020-10-20 00:51:14,174 INFO L226 Difference]: Without dead ends: 24 [2020-10-20 00:51:14,176 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 28 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 00:51:14,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-20 00:51:14,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-20 00:51:14,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-20 00:51:14,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2020-10-20 00:51:14,207 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 15 [2020-10-20 00:51:14,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:51:14,208 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2020-10-20 00:51:14,208 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-20 00:51:14,208 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2020-10-20 00:51:14,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-20 00:51:14,209 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:51:14,209 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:51:14,421 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-10-20 00:51:14,422 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:51:14,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:51:14,422 INFO L82 PathProgramCache]: Analyzing trace with hash -1030348571, now seen corresponding path program 1 times [2020-10-20 00:51:14,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-20 00:51:14,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [865827586] [2020-10-20 00:51:14,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2020-10-20 00:51:14,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:51:14,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-20 00:51:14,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:51:14,572 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 00:51:14,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-20 00:51:14,596 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 00:51:14,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [865827586] [2020-10-20 00:51:14,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:51:14,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2020-10-20 00:51:14,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709746744] [2020-10-20 00:51:14,599 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 00:51:14,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-20 00:51:14,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 00:51:14,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-20 00:51:14,600 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 4 states. [2020-10-20 00:51:14,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:51:14,630 INFO L93 Difference]: Finished difference Result 47 states and 56 transitions. [2020-10-20 00:51:14,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 00:51:14,631 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-10-20 00:51:14,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:51:14,632 INFO L225 Difference]: With dead ends: 47 [2020-10-20 00:51:14,632 INFO L226 Difference]: Without dead ends: 30 [2020-10-20 00:51:14,633 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-20 00:51:14,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-20 00:51:14,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-10-20 00:51:14,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-20 00:51:14,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-10-20 00:51:14,640 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 15 [2020-10-20 00:51:14,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:51:14,641 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-10-20 00:51:14,641 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 00:51:14,641 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-10-20 00:51:14,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-20 00:51:14,642 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:51:14,642 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:51:14,854 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-10-20 00:51:14,855 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:51:14,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:51:14,856 INFO L82 PathProgramCache]: Analyzing trace with hash 272703461, now seen corresponding path program 1 times [2020-10-20 00:51:14,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-20 00:51:14,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [528111553] [2020-10-20 00:51:14,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2020-10-20 00:51:14,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:51:15,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-20 00:51:15,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:51:15,128 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 11 treesize of output 7 [2020-10-20 00:51:15,129 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-20 00:51:15,137 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 00:51:15,139 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-20 00:51:15,139 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:16, output treesize:8 [2020-10-20 00:51:15,162 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2020-10-20 00:51:15,163 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-20 00:51:15,166 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 00:51:15,166 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 00:51:15,167 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:16, output treesize:4 [2020-10-20 00:51:15,206 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-20 00:51:15,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-20 00:51:15,220 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2020-10-20 00:51:15,222 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2020-10-20 00:51:15,248 INFO L625 ElimStorePlain]: treesize reduction 9, result has 55.0 percent of original size [2020-10-20 00:51:15,248 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 3 xjuncts. [2020-10-20 00:51:15,249 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:16, output treesize:11 [2020-10-20 00:51:15,257 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-20 00:51:15,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [528111553] [2020-10-20 00:51:15,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:51:15,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 7 [2020-10-20 00:51:15,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537933776] [2020-10-20 00:51:15,259 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-20 00:51:15,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-20 00:51:15,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-20 00:51:15,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-20 00:51:15,260 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 7 states. [2020-10-20 00:51:15,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:51:15,631 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2020-10-20 00:51:15,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-20 00:51:15,632 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-10-20 00:51:15,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:51:15,633 INFO L225 Difference]: With dead ends: 49 [2020-10-20 00:51:15,633 INFO L226 Difference]: Without dead ends: 44 [2020-10-20 00:51:15,634 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2020-10-20 00:51:15,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-20 00:51:15,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 32. [2020-10-20 00:51:15,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-20 00:51:15,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2020-10-20 00:51:15,641 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 25 [2020-10-20 00:51:15,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:51:15,642 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2020-10-20 00:51:15,642 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-20 00:51:15,642 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2020-10-20 00:51:15,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-20 00:51:15,643 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:51:15,643 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:51:15,857 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-10-20 00:51:15,858 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:51:15,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:51:15,858 INFO L82 PathProgramCache]: Analyzing trace with hash 274312175, now seen corresponding path program 1 times [2020-10-20 00:51:15,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-20 00:51:15,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1240746795] [2020-10-20 00:51:15,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 5 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with mathsat -unsat_core_generation=3 [2020-10-20 00:51:16,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:51:16,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-20 00:51:16,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:51:16,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-20 00:51:16,278 INFO L350 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2020-10-20 00:51:16,278 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2020-10-20 00:51:16,279 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-20 00:51:16,300 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 00:51:16,304 INFO L545 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-10-20 00:51:16,304 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:35, output treesize:24 [2020-10-20 00:51:16,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-20 00:51:16,381 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 11 [2020-10-20 00:51:16,383 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-20 00:51:16,393 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 00:51:16,397 INFO L545 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-20 00:51:16,398 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:31, output treesize:4 [2020-10-20 00:51:16,424 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-20 00:51:16,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-20 00:51:16,454 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 00:51:16,464 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 00:51:16,465 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-10-20 00:51:16,465 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:21 [2020-10-20 00:51:24,607 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 73 [2020-10-20 00:51:24,608 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-10-20 00:51:24,720 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2020-10-20 00:51:24,721 INFO L625 ElimStorePlain]: treesize reduction 31, result has 57.5 percent of original size [2020-10-20 00:51:24,730 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-20 00:51:24,733 INFO L545 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2020-10-20 00:51:24,734 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:34, output treesize:42 [2020-10-20 00:51:24,738 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-20 00:51:24,739 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-20 00:51:24,833 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-20 00:51:25,172 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-20 00:51:25,221 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-20 00:51:25,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1240746795] [2020-10-20 00:51:25,221 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:51:25,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10, 10] imperfect sequences [] total 17 [2020-10-20 00:51:25,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916783390] [2020-10-20 00:51:25,222 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-20 00:51:25,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-20 00:51:25,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-20 00:51:25,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=216, Unknown=4, NotChecked=0, Total=272 [2020-10-20 00:51:25,223 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 17 states. [2020-10-20 00:51:28,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:51:28,282 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2020-10-20 00:51:28,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-20 00:51:28,288 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 25 [2020-10-20 00:51:28,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:51:28,289 INFO L225 Difference]: With dead ends: 39 [2020-10-20 00:51:28,289 INFO L226 Difference]: Without dead ends: 30 [2020-10-20 00:51:28,290 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=153, Invalid=395, Unknown=4, NotChecked=0, Total=552 [2020-10-20 00:51:28,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-20 00:51:28,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-10-20 00:51:28,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-20 00:51:28,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2020-10-20 00:51:28,299 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 25 [2020-10-20 00:51:28,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:51:28,300 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2020-10-20 00:51:28,300 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-20 00:51:28,300 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2020-10-20 00:51:28,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-20 00:51:28,301 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:51:28,301 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:51:28,514 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2020-10-20 00:51:28,515 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:51:28,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:51:28,516 INFO L82 PathProgramCache]: Analyzing trace with hash 824998241, now seen corresponding path program 1 times [2020-10-20 00:51:28,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-20 00:51:28,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [18333553] [2020-10-20 00:51:28,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 6 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with mathsat -unsat_core_generation=3 [2020-10-20 00:51:28,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:51:28,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 39 conjunts are in the unsatisfiable core [2020-10-20 00:51:28,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:51:28,881 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 13 treesize of output 9 [2020-10-20 00:51:28,882 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-20 00:51:28,898 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 00:51:28,899 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-20 00:51:28,901 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:21 [2020-10-20 00:51:29,044 INFO L441 ElimStorePlain]: Different costs {4=[|v_#memory_$Pointer$.offset_34|], 10=[|v_#memory_$Pointer$.base_37|]} [2020-10-20 00:51:29,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-20 00:51:29,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-20 00:51:29,068 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2020-10-20 00:51:29,069 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-20 00:51:29,136 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 00:51:29,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-20 00:51:29,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-20 00:51:29,277 INFO L350 Elim1Store]: treesize reduction 27, result has 67.1 percent of original size [2020-10-20 00:51:29,278 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 82 [2020-10-20 00:51:29,281 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-10-20 00:51:29,282 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-10-20 00:51:29,285 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-10-20 00:51:29,416 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 40 [2020-10-20 00:51:29,417 INFO L625 ElimStorePlain]: treesize reduction 97, result has 46.1 percent of original size [2020-10-20 00:51:29,421 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-10-20 00:51:29,424 INFO L545 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-10-20 00:51:29,424 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:80, output treesize:83 [2020-10-20 00:51:29,426 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-10-20 00:51:29,516 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-10-20 00:51:32,173 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-10-20 00:51:32,177 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-10-20 00:51:32,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-20 00:51:32,224 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2020-10-20 00:51:32,225 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-20 00:51:32,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-20 00:51:32,246 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 10 [2020-10-20 00:51:32,247 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-10-20 00:51:32,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-20 00:51:32,270 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 10 [2020-10-20 00:51:32,271 INFO L545 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-10-20 00:51:32,377 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-10-20 00:51:32,378 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 00:51:32,382 INFO L545 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: 5 dim-0 vars, and 3 xjuncts. [2020-10-20 00:51:32,383 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:191, output treesize:127 [2020-10-20 00:51:32,736 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 36 [2020-10-20 00:51:33,754 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 00:51:33,755 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 64 [2020-10-20 00:51:33,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [18333553] [2020-10-20 00:51:33,758 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: no int: (_ BitVec 32) [2020-10-20 00:51:33,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [821291448] [2020-10-20 00:51:33,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-20 00:51:34,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:51:34,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-20 00:51:34,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:51:34,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-20 00:51:34,508 INFO L350 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2020-10-20 00:51:34,508 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 24 [2020-10-20 00:51:34,509 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-20 00:51:34,547 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 00:51:34,549 INFO L545 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-10-20 00:51:34,550 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:51, output treesize:40 [2020-10-20 00:51:34,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-20 00:51:34,932 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 00:51:34,932 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 101 [2020-10-20 00:51:34,937 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[7, 3, 2, 1] term [2020-10-20 00:51:34,937 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-10-20 00:51:34,939 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-10-20 00:51:51,355 WARN L193 SmtUtils]: Spent 16.42 s on a formula simplification. DAG size of input: 55 DAG size of output: 36 [2020-10-20 00:51:51,356 INFO L625 ElimStorePlain]: treesize reduction 103, result has 46.4 percent of original size [2020-10-20 00:51:51,360 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 00:51:51,361 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: no int: (_ BitVec 32) [2020-10-20 00:51:51,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593865393] [2020-10-20 00:51:51,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 00:51:51,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:51:51,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-20 00:51:51,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:51:51,953 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 00:51:51,956 INFO L441 ElimStorePlain]: Different costs {2=[|v_#memory_$Pointer$.offset_35|], 6=[|v_#memory_$Pointer$.base_41|]} [2020-10-20 00:51:51,977 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 21 treesize of output 13 [2020-10-20 00:51:51,977 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-20 00:51:52,047 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 00:51:52,048 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 61 [2020-10-20 00:51:52,050 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 00:51:52,054 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-10-20 00:51:52,189 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 33 [2020-10-20 00:51:52,190 INFO L625 ElimStorePlain]: treesize reduction 36, result has 77.1 percent of original size [2020-10-20 00:51:52,259 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 00:51:52,260 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 56 treesize of output 78 [2020-10-20 00:51:52,261 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: no int: (_ BitVec 32) [2020-10-20 00:51:52,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:51:52,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2020-10-20 00:51:52,261 ERROR L205 FreeRefinementEngine]: Strategy WOLF failed to provide any proof altough trace is infeasible [2020-10-20 00:51:52,261 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-20 00:51:52,870 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 cvc4 --incremental --print-success --lang smt --rewrite-divk,6 mathsat -unsat_core_generation=3,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 00:51:52,889 WARN L238 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-10-20 00:51:52,890 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 12:51:52 BoogieIcfgContainer [2020-10-20 00:51:52,890 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-20 00:51:52,890 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 00:51:52,891 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 00:51:52,891 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 00:51:52,891 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:51:13" (3/4) ... [2020-10-20 00:51:52,895 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-10-20 00:51:52,896 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 00:51:52,898 INFO L168 Benchmark]: Toolchain (without parser) took 40438.68 ms. Allocated memory was 41.4 MB in the beginning and 67.6 MB in the end (delta: 26.2 MB). Free memory was 18.7 MB in the beginning and 26.6 MB in the end (delta: -7.9 MB). Peak memory consumption was 18.3 MB. Max. memory is 14.3 GB. [2020-10-20 00:51:52,899 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 32.0 MB. Free memory was 9.2 MB in the beginning and 9.1 MB in the end (delta: 47.7 kB). Peak memory consumption was 47.7 kB. Max. memory is 14.3 GB. [2020-10-20 00:51:52,899 INFO L168 Benchmark]: CACSL2BoogieTranslator took 603.05 ms. Allocated memory was 41.4 MB in the beginning and 43.5 MB in the end (delta: 2.1 MB). Free memory was 17.9 MB in the beginning and 20.1 MB in the end (delta: -2.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 14.3 GB. [2020-10-20 00:51:52,900 INFO L168 Benchmark]: Boogie Procedure Inliner took 71.71 ms. Allocated memory is still 43.5 MB. Free memory was 19.9 MB in the beginning and 17.5 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.3 GB. [2020-10-20 00:51:52,901 INFO L168 Benchmark]: Boogie Preprocessor took 46.85 ms. Allocated memory is still 43.5 MB. Free memory was 17.5 MB in the beginning and 15.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 14.3 GB. [2020-10-20 00:51:52,902 INFO L168 Benchmark]: RCFGBuilder took 613.01 ms. Allocated memory was 43.5 MB in the beginning and 45.6 MB in the end (delta: 2.1 MB). Free memory was 15.2 MB in the beginning and 24.9 MB in the end (delta: -9.7 MB). Peak memory consumption was 6.4 MB. Max. memory is 14.3 GB. [2020-10-20 00:51:52,903 INFO L168 Benchmark]: TraceAbstraction took 39086.54 ms. Allocated memory was 45.6 MB in the beginning and 67.6 MB in the end (delta: 22.0 MB). Free memory was 24.5 MB in the beginning and 27.4 MB in the end (delta: -2.8 MB). Peak memory consumption was 36.9 MB. Max. memory is 14.3 GB. [2020-10-20 00:51:52,903 INFO L168 Benchmark]: Witness Printer took 5.54 ms. Allocated memory is still 67.6 MB. Free memory was 27.4 MB in the beginning and 26.6 MB in the end (delta: 782.3 kB). Peak memory consumption was 782.3 kB. Max. memory is 14.3 GB. [2020-10-20 00:51:52,908 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 32.0 MB. Free memory was 9.2 MB in the beginning and 9.1 MB in the end (delta: 47.7 kB). Peak memory consumption was 47.7 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 603.05 ms. Allocated memory was 41.4 MB in the beginning and 43.5 MB in the end (delta: 2.1 MB). Free memory was 17.9 MB in the beginning and 20.1 MB in the end (delta: -2.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 71.71 ms. Allocated memory is still 43.5 MB. Free memory was 19.9 MB in the beginning and 17.5 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 46.85 ms. Allocated memory is still 43.5 MB. Free memory was 17.5 MB in the beginning and 15.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 14.3 GB. * RCFGBuilder took 613.01 ms. Allocated memory was 43.5 MB in the beginning and 45.6 MB in the end (delta: 2.1 MB). Free memory was 15.2 MB in the beginning and 24.9 MB in the end (delta: -9.7 MB). Peak memory consumption was 6.4 MB. Max. memory is 14.3 GB. * TraceAbstraction took 39086.54 ms. Allocated memory was 45.6 MB in the beginning and 67.6 MB in the end (delta: 22.0 MB). Free memory was 24.5 MB in the beginning and 27.4 MB in the end (delta: -2.8 MB). Peak memory consumption was 36.9 MB. Max. memory is 14.3 GB. * Witness Printer took 5.54 ms. Allocated memory is still 67.6 MB. Free memory was 27.4 MB in the beginning and 26.6 MB in the end (delta: 782.3 kB). Peak memory consumption was 782.3 kB. Max. memory is 14.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 12]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L612] const int len = 2; [L613] const int data = 1; [L614] SLL s = sll_create(len, data); [L584] SLL head = ((void *)0); [L585] COND TRUE len > 0 [L575] SLL temp = (SLL) malloc(sizeof(struct node)); [L576] COND FALSE !(((void *)0) == temp) [L579] temp->next = ((void *)0) [L580] temp->data = data [L581] return temp; [L586] SLL new_head = node_create(data); [L587] new_head->next = head [L588] head = new_head [L585] len-- [L585] COND TRUE len > 0 [L575] SLL temp = (SLL) malloc(sizeof(struct node)); [L576] COND FALSE !(((void *)0) == temp) [L579] temp->next = ((void *)0) [L580] temp->data = data [L581] return temp; [L586] SLL new_head = node_create(data); [L587] new_head->next = head [L588] head = new_head [L585] len-- [L585] COND FALSE !(len > 0) [L590] return head; [L614] SLL s = sll_create(len, data); [L575] SLL temp = (SLL) malloc(sizeof(struct node)); [L576] COND FALSE !(((void *)0) == temp) [L579] temp->next = ((void *)0) [L580] temp->data = data [L581] return temp; [L600] SLL new_last = node_create(data); [L601] EXPR \read(*head) [L601] COND FALSE !(((void *)0) == *head) [L604] EXPR \read(*head) [L604] SLL last = *head; [L605] last->next [L605] COND FALSE !(last->next) [L608] last->next = new_last [L616] EXPR \read(s) [L616] SLL ptr = s; [L617] int count = 0; [L618] COND FALSE !(\read(ptr)) [L626] COND TRUE count != 1 + len [L12] COND FALSE !(0) [L12] __assert_fail ("0", "sll2n_append_equal.c", 3, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 38.9s, OverallIterations: 5, TraceHistogramMax: 2, AutomataDifference: 3.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 97 SDtfs, 222 SDslu, 112 SDs, 0 SdLazy, 157 SolverSat, 29 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 2.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 163 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 9.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred in iteration=0, 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, 12 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 9.5s InterpolantComputationTime, 80 NumberOfCodeBlocks, 80 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 152 ConstructedInterpolants, 12 QuantifiedInterpolants, 13180 SizeOfPredicates, 38 NumberOfNonLiveVariables, 418 ConjunctsInSsa, 34 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 PerfectInterpolantSequences, 28/28 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 could not prove your program: unable to determine feasibility of some traces Received shutdown request...