./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/list-properties/list_flag-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9a8b2e8d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/list-properties/list_flag-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8d8f817036215afe0570c141fddfde907924f85b ................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.25-9a8b2e8 [2020-10-20 00:42:26,012 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 00:42:26,016 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 00:42:26,060 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 00:42:26,061 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 00:42:26,074 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 00:42:26,076 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 00:42:26,079 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 00:42:26,082 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 00:42:26,085 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 00:42:26,087 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 00:42:26,089 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 00:42:26,090 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 00:42:26,094 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 00:42:26,096 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 00:42:26,097 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 00:42:26,098 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 00:42:26,098 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 00:42:26,104 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 00:42:26,106 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 00:42:26,108 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 00:42:26,109 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 00:42:26,110 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 00:42:26,111 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 00:42:26,113 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 00:42:26,114 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 00:42:26,114 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 00:42:26,115 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 00:42:26,115 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 00:42:26,116 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 00:42:26,117 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 00:42:26,117 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 00:42:26,118 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 00:42:26,119 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 00:42:26,120 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 00:42:26,120 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 00:42:26,121 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 00:42:26,121 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 00:42:26,122 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 00:42:26,123 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 00:42:26,123 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 00:42:26,124 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-20 00:42:26,171 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 00:42:26,173 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 00:42:26,175 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 00:42:26,176 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 00:42:26,176 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 00:42:26,177 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 00:42:26,177 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-20 00:42:26,177 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-20 00:42:26,178 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-20 00:42:26,178 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 00:42:26,179 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-20 00:42:26,179 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-20 00:42:26,180 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-20 00:42:26,180 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-20 00:42:26,180 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-20 00:42:26,181 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 00:42:26,181 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-20 00:42:26,181 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 00:42:26,182 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 00:42:26,182 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-20 00:42:26,182 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-20 00:42:26,183 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 00:42:26,183 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 00:42:26,183 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-20 00:42:26,184 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-20 00:42:26,184 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-20 00:42:26,184 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-20 00:42:26,185 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-20 00:42:26,185 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 00:42:26,185 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 -> 8d8f817036215afe0570c141fddfde907924f85b [2020-10-20 00:42:26,458 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 00:42:26,481 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 00:42:26,486 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 00:42:26,490 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 00:42:26,491 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 00:42:26,492 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-properties/list_flag-1.i [2020-10-20 00:42:26,557 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f768aeb8b/bb7612dbc29c4974b5b087331362a569/FLAG0ad41e541 [2020-10-20 00:42:27,084 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 00:42:27,085 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-properties/list_flag-1.i [2020-10-20 00:42:27,099 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f768aeb8b/bb7612dbc29c4974b5b087331362a569/FLAG0ad41e541 [2020-10-20 00:42:27,388 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f768aeb8b/bb7612dbc29c4974b5b087331362a569 [2020-10-20 00:42:27,392 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 00:42:27,398 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-20 00:42:27,410 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 00:42:27,411 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 00:42:27,414 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 00:42:27,416 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:42:27" (1/1) ... [2020-10-20 00:42:27,419 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38dba1cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:42:27, skipping insertion in model container [2020-10-20 00:42:27,420 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:42:27" (1/1) ... [2020-10-20 00:42:27,428 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 00:42:27,469 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 00:42:27,847 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:42:27,864 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 00:42:27,944 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:42:28,006 INFO L208 MainTranslator]: Completed translation [2020-10-20 00:42:28,007 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:42:28 WrapperNode [2020-10-20 00:42:28,007 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 00:42:28,008 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-20 00:42:28,009 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-20 00:42:28,009 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-20 00:42:28,018 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:42:28" (1/1) ... [2020-10-20 00:42:28,034 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:42:28" (1/1) ... [2020-10-20 00:42:28,059 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-20 00:42:28,062 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 00:42:28,063 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 00:42:28,063 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 00:42:28,073 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:42:28" (1/1) ... [2020-10-20 00:42:28,073 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:42:28" (1/1) ... [2020-10-20 00:42:28,077 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:42:28" (1/1) ... [2020-10-20 00:42:28,077 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:42:28" (1/1) ... [2020-10-20 00:42:28,085 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:42:28" (1/1) ... [2020-10-20 00:42:28,091 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:42:28" (1/1) ... [2020-10-20 00:42:28,093 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:42:28" (1/1) ... [2020-10-20 00:42:28,096 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 00:42:28,097 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 00:42:28,097 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 00:42:28,097 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 00:42:28,098 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:42:28" (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 00:42:28,170 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-20 00:42:28,171 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-20 00:42:28,171 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-20 00:42:28,171 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-20 00:42:28,171 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-20 00:42:28,171 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-20 00:42:28,172 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-20 00:42:28,172 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 00:42:28,172 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 00:42:28,568 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 00:42:28,569 INFO L298 CfgBuilder]: Removed 13 assume(true) statements. [2020-10-20 00:42:28,571 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:42:28 BoogieIcfgContainer [2020-10-20 00:42:28,571 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 00:42:28,573 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-20 00:42:28,573 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-20 00:42:28,577 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-20 00:42:28,577 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 12:42:27" (1/3) ... [2020-10-20 00:42:28,578 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ab00584 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:42:28, skipping insertion in model container [2020-10-20 00:42:28,578 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:42:28" (2/3) ... [2020-10-20 00:42:28,579 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ab00584 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:42:28, skipping insertion in model container [2020-10-20 00:42:28,579 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:42:28" (3/3) ... [2020-10-20 00:42:28,581 INFO L111 eAbstractionObserver]: Analyzing ICFG list_flag-1.i [2020-10-20 00:42:28,593 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-20 00:42:28,601 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-20 00:42:28,613 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-20 00:42:28,637 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-20 00:42:28,638 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-20 00:42:28,638 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-20 00:42:28,639 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 00:42:28,639 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 00:42:28,639 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-20 00:42:28,639 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 00:42:28,640 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-20 00:42:28,656 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-10-20 00:42:28,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-20 00:42:28,661 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:42:28,662 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:42:28,663 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:42:28,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:42:28,668 INFO L82 PathProgramCache]: Analyzing trace with hash -1518085449, now seen corresponding path program 1 times [2020-10-20 00:42:28,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:42:28,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70001451] [2020-10-20 00:42:28,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:42:28,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:42:28,835 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 00:42:28,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70001451] [2020-10-20 00:42:28,837 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:42:28,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-20 00:42:28,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614761608] [2020-10-20 00:42:28,844 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-20 00:42:28,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:42:28,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-20 00:42:28,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-20 00:42:28,862 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 2 states. [2020-10-20 00:42:28,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:42:28,883 INFO L93 Difference]: Finished difference Result 43 states and 60 transitions. [2020-10-20 00:42:28,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-20 00:42:28,885 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 13 [2020-10-20 00:42:28,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:42:28,894 INFO L225 Difference]: With dead ends: 43 [2020-10-20 00:42:28,894 INFO L226 Difference]: Without dead ends: 22 [2020-10-20 00:42:28,898 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 00:42:28,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-20 00:42:28,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-10-20 00:42:28,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-20 00:42:28,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2020-10-20 00:42:28,932 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 13 [2020-10-20 00:42:28,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:42:28,932 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2020-10-20 00:42:28,932 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-20 00:42:28,933 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2020-10-20 00:42:28,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-20 00:42:28,934 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:42:28,934 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:42:28,934 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-20 00:42:28,935 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:42:28,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:42:28,935 INFO L82 PathProgramCache]: Analyzing trace with hash 1194268909, now seen corresponding path program 1 times [2020-10-20 00:42:28,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:42:28,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199779435] [2020-10-20 00:42:28,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:42:28,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:42:29,052 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 00:42:29,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199779435] [2020-10-20 00:42:29,053 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:42:29,053 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-20 00:42:29,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876408804] [2020-10-20 00:42:29,059 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-20 00:42:29,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:42:29,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-20 00:42:29,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-20 00:42:29,061 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 5 states. [2020-10-20 00:42:29,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:42:29,209 INFO L93 Difference]: Finished difference Result 50 states and 59 transitions. [2020-10-20 00:42:29,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-20 00:42:29,211 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-10-20 00:42:29,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:42:29,212 INFO L225 Difference]: With dead ends: 50 [2020-10-20 00:42:29,212 INFO L226 Difference]: Without dead ends: 44 [2020-10-20 00:42:29,214 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-20 00:42:29,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-20 00:42:29,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 30. [2020-10-20 00:42:29,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-20 00:42:29,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2020-10-20 00:42:29,228 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 15 [2020-10-20 00:42:29,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:42:29,229 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2020-10-20 00:42:29,229 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-20 00:42:29,230 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2020-10-20 00:42:29,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-20 00:42:29,231 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:42:29,232 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:42:29,233 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-20 00:42:29,233 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:42:29,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:42:29,234 INFO L82 PathProgramCache]: Analyzing trace with hash 466716680, now seen corresponding path program 1 times [2020-10-20 00:42:29,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:42:29,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846269173] [2020-10-20 00:42:29,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:42:29,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:42:29,362 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:42:29,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846269173] [2020-10-20 00:42:29,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:42:29,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-20 00:42:29,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130968263] [2020-10-20 00:42:29,364 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-20 00:42:29,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:42:29,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-20 00:42:29,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-20 00:42:29,365 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand 5 states. [2020-10-20 00:42:29,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:42:29,470 INFO L93 Difference]: Finished difference Result 52 states and 60 transitions. [2020-10-20 00:42:29,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-20 00:42:29,471 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-10-20 00:42:29,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:42:29,472 INFO L225 Difference]: With dead ends: 52 [2020-10-20 00:42:29,472 INFO L226 Difference]: Without dead ends: 42 [2020-10-20 00:42:29,473 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-20 00:42:29,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-20 00:42:29,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 28. [2020-10-20 00:42:29,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-20 00:42:29,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2020-10-20 00:42:29,479 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 17 [2020-10-20 00:42:29,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:42:29,480 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2020-10-20 00:42:29,480 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-20 00:42:29,480 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2020-10-20 00:42:29,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-20 00:42:29,481 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:42:29,481 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:42:29,482 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-20 00:42:29,482 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:42:29,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:42:29,482 INFO L82 PathProgramCache]: Analyzing trace with hash -767976713, now seen corresponding path program 1 times [2020-10-20 00:42:29,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:42:29,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747179431] [2020-10-20 00:42:29,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:42:29,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:42:29,540 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:42:29,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747179431] [2020-10-20 00:42:29,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:42:29,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-20 00:42:29,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557944604] [2020-10-20 00:42:29,542 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-20 00:42:29,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:42:29,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-20 00:42:29,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-20 00:42:29,543 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 5 states. [2020-10-20 00:42:29,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:42:29,634 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2020-10-20 00:42:29,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-20 00:42:29,634 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-10-20 00:42:29,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:42:29,635 INFO L225 Difference]: With dead ends: 50 [2020-10-20 00:42:29,635 INFO L226 Difference]: Without dead ends: 38 [2020-10-20 00:42:29,636 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-20 00:42:29,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-20 00:42:29,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 24. [2020-10-20 00:42:29,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-20 00:42:29,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2020-10-20 00:42:29,640 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 17 [2020-10-20 00:42:29,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:42:29,641 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2020-10-20 00:42:29,641 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-20 00:42:29,641 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2020-10-20 00:42:29,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-20 00:42:29,642 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:42:29,642 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:42:29,642 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-20 00:42:29,642 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:42:29,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:42:29,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1548345954, now seen corresponding path program 1 times [2020-10-20 00:42:29,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:42:29,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267002475] [2020-10-20 00:42:29,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:42:29,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:42:29,694 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:42:29,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267002475] [2020-10-20 00:42:29,695 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:42:29,695 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-20 00:42:29,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003379811] [2020-10-20 00:42:29,696 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-20 00:42:29,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:42:29,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-20 00:42:29,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-20 00:42:29,697 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 3 states. [2020-10-20 00:42:29,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:42:29,713 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions. [2020-10-20 00:42:29,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-20 00:42:29,713 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-10-20 00:42:29,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:42:29,714 INFO L225 Difference]: With dead ends: 56 [2020-10-20 00:42:29,714 INFO L226 Difference]: Without dead ends: 38 [2020-10-20 00:42:29,715 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 00:42:29,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-20 00:42:29,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 32. [2020-10-20 00:42:29,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-20 00:42:29,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2020-10-20 00:42:29,720 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 21 [2020-10-20 00:42:29,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:42:29,720 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2020-10-20 00:42:29,721 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-20 00:42:29,721 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2020-10-20 00:42:29,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-20 00:42:29,722 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:42:29,722 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:42:29,722 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-20 00:42:29,722 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:42:29,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:42:29,723 INFO L82 PathProgramCache]: Analyzing trace with hash 318904113, now seen corresponding path program 1 times [2020-10-20 00:42:29,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:42:29,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255885055] [2020-10-20 00:42:29,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:42:29,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 00:42:29,750 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 00:42:29,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 00:42:29,769 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 00:42:29,808 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 00:42:29,809 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-20 00:42:29,809 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-20 00:42:29,874 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 12:42:29 BoogieIcfgContainer [2020-10-20 00:42:29,875 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-20 00:42:29,875 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 00:42:29,875 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 00:42:29,876 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 00:42:29,876 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:42:28" (3/4) ... [2020-10-20 00:42:29,880 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-10-20 00:42:29,944 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-20 00:42:29,945 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 00:42:29,948 INFO L168 Benchmark]: Toolchain (without parser) took 2553.58 ms. Allocated memory was 35.1 MB in the beginning and 53.0 MB in the end (delta: 17.8 MB). Free memory was 7.2 MB in the beginning and 18.1 MB in the end (delta: -10.9 MB). Peak memory consumption was 6.9 MB. Max. memory is 14.3 GB. [2020-10-20 00:42:29,949 INFO L168 Benchmark]: CDTParser took 1.02 ms. Allocated memory is still 34.6 MB. Free memory was 13.3 MB in the beginning and 13.2 MB in the end (delta: 68.4 kB). Peak memory consumption was 68.4 kB. Max. memory is 14.3 GB. [2020-10-20 00:42:29,950 INFO L168 Benchmark]: CACSL2BoogieTranslator took 598.21 ms. Allocated memory was 37.2 MB in the beginning and 47.2 MB in the end (delta: 10.0 MB). Free memory was 19.7 MB in the beginning and 29.6 MB in the end (delta: -9.9 MB). Peak memory consumption was 18.4 MB. Max. memory is 14.3 GB. [2020-10-20 00:42:29,951 INFO L168 Benchmark]: Boogie Procedure Inliner took 51.51 ms. Allocated memory is still 47.2 MB. Free memory was 29.3 MB in the beginning and 27.3 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 14.3 GB. [2020-10-20 00:42:29,952 INFO L168 Benchmark]: Boogie Preprocessor took 33.90 ms. Allocated memory is still 47.2 MB. Free memory was 27.3 MB in the beginning and 25.7 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 14.3 GB. [2020-10-20 00:42:29,953 INFO L168 Benchmark]: RCFGBuilder took 474.84 ms. Allocated memory is still 47.2 MB. Free memory was 25.7 MB in the beginning and 21.7 MB in the end (delta: 4.0 MB). Peak memory consumption was 15.5 MB. Max. memory is 14.3 GB. [2020-10-20 00:42:29,953 INFO L168 Benchmark]: TraceAbstraction took 1301.84 ms. Allocated memory was 47.2 MB in the beginning and 53.0 MB in the end (delta: 5.8 MB). Free memory was 21.1 MB in the beginning and 21.2 MB in the end (delta: -123.0 kB). Peak memory consumption was 5.6 MB. Max. memory is 14.3 GB. [2020-10-20 00:42:29,954 INFO L168 Benchmark]: Witness Printer took 69.91 ms. Allocated memory is still 53.0 MB. Free memory was 21.2 MB in the beginning and 18.1 MB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 14.3 GB. [2020-10-20 00:42:29,959 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.02 ms. Allocated memory is still 34.6 MB. Free memory was 13.3 MB in the beginning and 13.2 MB in the end (delta: 68.4 kB). Peak memory consumption was 68.4 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 598.21 ms. Allocated memory was 37.2 MB in the beginning and 47.2 MB in the end (delta: 10.0 MB). Free memory was 19.7 MB in the beginning and 29.6 MB in the end (delta: -9.9 MB). Peak memory consumption was 18.4 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 51.51 ms. Allocated memory is still 47.2 MB. Free memory was 29.3 MB in the beginning and 27.3 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 33.90 ms. Allocated memory is still 47.2 MB. Free memory was 27.3 MB in the beginning and 25.7 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 14.3 GB. * RCFGBuilder took 474.84 ms. Allocated memory is still 47.2 MB. Free memory was 25.7 MB in the beginning and 21.7 MB in the end (delta: 4.0 MB). Peak memory consumption was 15.5 MB. Max. memory is 14.3 GB. * TraceAbstraction took 1301.84 ms. Allocated memory was 47.2 MB in the beginning and 53.0 MB in the end (delta: 5.8 MB). Free memory was 21.1 MB in the beginning and 21.2 MB in the end (delta: -123.0 kB). Peak memory consumption was 5.6 MB. Max. memory is 14.3 GB. * Witness Printer took 69.91 ms. Allocated memory is still 53.0 MB. Free memory was 21.2 MB in the beginning and 18.1 MB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 14.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 12]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L532] int flag = __VERIFIER_nondet_int(); [L533] List p, a, t; [L534] a = (List) malloc(sizeof(struct node)) [L535] COND FALSE !(a == 0) [L536] p = a [L537] COND TRUE __VERIFIER_nondet_int() [L538] COND TRUE \read(flag) [L539] p->h = 1 [L543] t = (List) malloc(sizeof(struct node)) [L544] COND FALSE !(t == 0) [L545] p->n = t [L546] EXPR p->n [L546] p = p->n [L537] COND FALSE !(__VERIFIER_nondet_int()) [L548] p->h = 3 [L549] p = a [L550] COND TRUE \read(flag) [L551] EXPR p->h [L551] COND FALSE !(p->h == 2) [L556] EXPR p->h [L556] COND TRUE p->h != 3 [L12] COND FALSE !(0) [L12] __assert_fail ("0", "list_flag-1.c", 3, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.1s, OverallIterations: 6, TraceHistogramMax: 2, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 121 SDtfs, 79 SDslu, 161 SDs, 0 SdLazy, 138 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred in iteration=5, 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, 5 MinimizatonAttempts, 48 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 104 NumberOfCodeBlocks, 104 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 78 ConstructedInterpolants, 0 QuantifiedInterpolants, 3312 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 PerfectInterpolantSequences, 6/6 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...