./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/list-ext3-properties/sll_length_check-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9a8b2e8d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/list-ext3-properties/sll_length_check-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 3589167bbf5d7f5cd80f4f92aa27b7dbe19a0217 ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 00:53:10,991 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 00:53:10,994 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 00:53:11,037 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 00:53:11,037 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 00:53:11,046 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 00:53:11,049 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 00:53:11,053 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 00:53:11,055 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 00:53:11,059 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 00:53:11,061 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 00:53:11,063 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 00:53:11,063 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 00:53:11,067 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 00:53:11,068 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 00:53:11,070 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 00:53:11,072 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 00:53:11,073 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 00:53:11,076 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 00:53:11,083 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 00:53:11,086 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 00:53:11,093 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 00:53:11,095 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 00:53:11,096 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 00:53:11,108 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 00:53:11,112 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 00:53:11,112 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 00:53:11,113 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 00:53:11,114 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 00:53:11,115 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 00:53:11,117 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 00:53:11,118 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 00:53:11,119 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 00:53:11,123 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 00:53:11,124 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 00:53:11,124 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 00:53:11,124 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 00:53:11,124 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 00:53:11,124 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 00:53:11,125 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 00:53:11,126 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 00:53:11,127 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-20 00:53:11,148 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 00:53:11,148 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 00:53:11,149 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 00:53:11,150 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 00:53:11,150 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 00:53:11,150 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 00:53:11,151 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-20 00:53:11,151 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-20 00:53:11,151 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-20 00:53:11,151 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 00:53:11,151 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-20 00:53:11,152 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-20 00:53:11,152 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-20 00:53:11,152 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-20 00:53:11,152 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-20 00:53:11,153 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 00:53:11,153 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-20 00:53:11,153 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 00:53:11,153 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 00:53:11,154 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-20 00:53:11,154 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-20 00:53:11,154 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 00:53:11,155 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 00:53:11,155 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-20 00:53:11,155 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-20 00:53:11,155 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-20 00:53:11,155 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-20 00:53:11,156 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-20 00:53:11,156 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 00:53:11,156 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 -> 3589167bbf5d7f5cd80f4f92aa27b7dbe19a0217 [2020-10-20 00:53:11,376 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 00:53:11,394 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 00:53:11,399 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 00:53:11,401 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 00:53:11,402 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 00:53:11,403 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-ext3-properties/sll_length_check-1.i [2020-10-20 00:53:11,492 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8264f049c/b2eaa0a282eb4710af6337302292c4c5/FLAGd32b8cbd8 [2020-10-20 00:53:12,097 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 00:53:12,098 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext3-properties/sll_length_check-1.i [2020-10-20 00:53:12,113 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8264f049c/b2eaa0a282eb4710af6337302292c4c5/FLAGd32b8cbd8 [2020-10-20 00:53:12,384 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8264f049c/b2eaa0a282eb4710af6337302292c4c5 [2020-10-20 00:53:12,388 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 00:53:12,395 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-20 00:53:12,396 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 00:53:12,396 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 00:53:12,400 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 00:53:12,401 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:53:12" (1/1) ... [2020-10-20 00:53:12,407 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b953555 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:53:12, skipping insertion in model container [2020-10-20 00:53:12,407 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:53:12" (1/1) ... [2020-10-20 00:53:12,417 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 00:53:12,454 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 00:53:12,834 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:53:12,848 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 00:53:12,896 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:53:12,976 INFO L208 MainTranslator]: Completed translation [2020-10-20 00:53:12,977 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:53:12 WrapperNode [2020-10-20 00:53:12,977 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 00:53:12,979 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-20 00:53:12,979 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-20 00:53:12,979 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-20 00:53:12,989 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:53:12" (1/1) ... [2020-10-20 00:53:13,011 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:53:12" (1/1) ... [2020-10-20 00:53:13,036 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-20 00:53:13,036 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 00:53:13,036 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 00:53:13,036 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 00:53:13,043 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:53:12" (1/1) ... [2020-10-20 00:53:13,044 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:53:12" (1/1) ... [2020-10-20 00:53:13,047 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:53:12" (1/1) ... [2020-10-20 00:53:13,048 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:53:12" (1/1) ... [2020-10-20 00:53:13,055 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:53:12" (1/1) ... [2020-10-20 00:53:13,062 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:53:12" (1/1) ... [2020-10-20 00:53:13,064 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:53:12" (1/1) ... [2020-10-20 00:53:13,067 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 00:53:13,068 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 00:53:13,068 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 00:53:13,068 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 00:53:13,069 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:53:12" (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 00:53:13,143 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-20 00:53:13,143 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-20 00:53:13,143 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-20 00:53:13,143 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-20 00:53:13,144 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-20 00:53:13,144 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-20 00:53:13,144 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 00:53:13,144 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 00:53:13,453 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 00:53:13,454 INFO L298 CfgBuilder]: Removed 18 assume(true) statements. [2020-10-20 00:53:13,456 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:53:13 BoogieIcfgContainer [2020-10-20 00:53:13,457 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 00:53:13,458 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-20 00:53:13,458 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-20 00:53:13,462 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-20 00:53:13,462 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 12:53:12" (1/3) ... [2020-10-20 00:53:13,463 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17baa8e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:53:13, skipping insertion in model container [2020-10-20 00:53:13,464 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:53:12" (2/3) ... [2020-10-20 00:53:13,464 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17baa8e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:53:13, skipping insertion in model container [2020-10-20 00:53:13,464 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:53:13" (3/3) ... [2020-10-20 00:53:13,466 INFO L111 eAbstractionObserver]: Analyzing ICFG sll_length_check-1.i [2020-10-20 00:53:13,494 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-20 00:53:13,504 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-20 00:53:13,525 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-20 00:53:13,586 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-20 00:53:13,586 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-20 00:53:13,586 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-20 00:53:13,587 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 00:53:13,587 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 00:53:13,589 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-20 00:53:13,589 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 00:53:13,589 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-20 00:53:13,607 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-10-20 00:53:13,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-20 00:53:13,614 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:53:13,614 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:53:13,615 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:53:13,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:53:13,620 INFO L82 PathProgramCache]: Analyzing trace with hash 191422306, now seen corresponding path program 1 times [2020-10-20 00:53:13,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:53:13,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451778592] [2020-10-20 00:53:13,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:53:13,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:53:13,769 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 00:53:13,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451778592] [2020-10-20 00:53:13,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:53:13,772 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-20 00:53:13,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131999062] [2020-10-20 00:53:13,778 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-20 00:53:13,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:53:13,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-20 00:53:13,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-20 00:53:13,795 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 2 states. [2020-10-20 00:53:13,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:53:13,817 INFO L93 Difference]: Finished difference Result 46 states and 65 transitions. [2020-10-20 00:53:13,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-20 00:53:13,819 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 14 [2020-10-20 00:53:13,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:53:13,830 INFO L225 Difference]: With dead ends: 46 [2020-10-20 00:53:13,831 INFO L226 Difference]: Without dead ends: 19 [2020-10-20 00:53:13,835 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 00:53:13,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-20 00:53:13,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-10-20 00:53:13,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-20 00:53:13,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2020-10-20 00:53:13,875 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 14 [2020-10-20 00:53:13,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:53:13,876 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2020-10-20 00:53:13,892 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-20 00:53:13,893 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2020-10-20 00:53:13,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-20 00:53:13,894 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:53:13,894 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:53:13,894 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-20 00:53:13,895 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:53:13,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:53:13,895 INFO L82 PathProgramCache]: Analyzing trace with hash -992019435, now seen corresponding path program 1 times [2020-10-20 00:53:13,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:53:13,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034505143] [2020-10-20 00:53:13,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:53:13,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:53:14,027 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 00:53:14,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034505143] [2020-10-20 00:53:14,028 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:53:14,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 00:53:14,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458625243] [2020-10-20 00:53:14,030 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 00:53:14,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:53:14,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 00:53:14,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 00:53:14,031 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand 4 states. [2020-10-20 00:53:14,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:53:14,088 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2020-10-20 00:53:14,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 00:53:14,088 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-10-20 00:53:14,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:53:14,090 INFO L225 Difference]: With dead ends: 49 [2020-10-20 00:53:14,090 INFO L226 Difference]: Without dead ends: 39 [2020-10-20 00:53:14,091 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 00:53:14,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-20 00:53:14,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 24. [2020-10-20 00:53:14,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-20 00:53:14,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2020-10-20 00:53:14,098 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 16 [2020-10-20 00:53:14,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:53:14,098 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2020-10-20 00:53:14,098 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 00:53:14,099 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2020-10-20 00:53:14,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-20 00:53:14,099 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:53:14,100 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:53:14,100 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-20 00:53:14,100 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:53:14,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:53:14,100 INFO L82 PathProgramCache]: Analyzing trace with hash 617811326, now seen corresponding path program 1 times [2020-10-20 00:53:14,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:53:14,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818058069] [2020-10-20 00:53:14,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:53:14,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:53:14,193 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:53:14,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818058069] [2020-10-20 00:53:14,193 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:53:14,193 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-20 00:53:14,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481092660] [2020-10-20 00:53:14,205 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-20 00:53:14,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:53:14,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-20 00:53:14,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-20 00:53:14,206 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand 6 states. [2020-10-20 00:53:14,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:53:14,304 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2020-10-20 00:53:14,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-20 00:53:14,305 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-10-20 00:53:14,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:53:14,306 INFO L225 Difference]: With dead ends: 45 [2020-10-20 00:53:14,306 INFO L226 Difference]: Without dead ends: 38 [2020-10-20 00:53:14,307 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-20 00:53:14,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-20 00:53:14,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 28. [2020-10-20 00:53:14,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-20 00:53:14,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2020-10-20 00:53:14,314 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 19 [2020-10-20 00:53:14,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:53:14,314 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2020-10-20 00:53:14,314 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-20 00:53:14,315 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2020-10-20 00:53:14,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-20 00:53:14,315 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:53:14,316 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:53:14,316 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-20 00:53:14,316 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:53:14,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:53:14,316 INFO L82 PathProgramCache]: Analyzing trace with hash -2029446786, now seen corresponding path program 1 times [2020-10-20 00:53:14,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:53:14,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597717961] [2020-10-20 00:53:14,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:53:14,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:53:14,394 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:53:14,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597717961] [2020-10-20 00:53:14,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739885583] [2020-10-20 00:53:14,395 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 00:53:14,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:53:14,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-20 00:53:14,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:53:14,566 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:53:14,566 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-20 00:53:14,566 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2020-10-20 00:53:14,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041423800] [2020-10-20 00:53:14,567 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-20 00:53:14,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:53:14,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-20 00:53:14,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-20 00:53:14,568 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand 5 states. [2020-10-20 00:53:14,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:53:14,631 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2020-10-20 00:53:14,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-20 00:53:14,632 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-10-20 00:53:14,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:53:14,633 INFO L225 Difference]: With dead ends: 52 [2020-10-20 00:53:14,633 INFO L226 Difference]: Without dead ends: 42 [2020-10-20 00:53:14,634 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-10-20 00:53:14,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-20 00:53:14,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 21. [2020-10-20 00:53:14,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-20 00:53:14,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2020-10-20 00:53:14,640 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 19 [2020-10-20 00:53:14,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:53:14,640 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2020-10-20 00:53:14,640 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-20 00:53:14,640 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2020-10-20 00:53:14,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-20 00:53:14,641 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:53:14,641 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 00:53:14,855 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 00:53:14,856 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:53:14,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:53:14,857 INFO L82 PathProgramCache]: Analyzing trace with hash 72340444, now seen corresponding path program 1 times [2020-10-20 00:53:14,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:53:14,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537205833] [2020-10-20 00:53:14,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:53:14,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:53:14,987 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-20 00:53:14,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537205833] [2020-10-20 00:53:14,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677745341] [2020-10-20 00:53:14,987 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 00:53:15,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:53:15,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-20 00:53:15,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:53:15,080 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-20 00:53:15,080 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 00:53:15,080 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-20 00:53:15,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477500813] [2020-10-20 00:53:15,081 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-20 00:53:15,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:53:15,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-20 00:53:15,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-20 00:53:15,082 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand 6 states. [2020-10-20 00:53:15,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:53:15,175 INFO L93 Difference]: Finished difference Result 61 states and 69 transitions. [2020-10-20 00:53:15,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-20 00:53:15,176 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-10-20 00:53:15,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:53:15,177 INFO L225 Difference]: With dead ends: 61 [2020-10-20 00:53:15,177 INFO L226 Difference]: Without dead ends: 50 [2020-10-20 00:53:15,178 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-10-20 00:53:15,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-20 00:53:15,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 24. [2020-10-20 00:53:15,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-20 00:53:15,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2020-10-20 00:53:15,184 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 20 [2020-10-20 00:53:15,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:53:15,185 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2020-10-20 00:53:15,185 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-20 00:53:15,185 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2020-10-20 00:53:15,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-20 00:53:15,186 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:53:15,186 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:53:15,399 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 00:53:15,400 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:53:15,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:53:15,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1067124933, now seen corresponding path program 2 times [2020-10-20 00:53:15,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:53:15,402 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099737945] [2020-10-20 00:53:15,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:53:15,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:53:15,538 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:53:15,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099737945] [2020-10-20 00:53:15,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776167390] [2020-10-20 00:53:15,540 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 00:53:15,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-20 00:53:15,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 00:53:15,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-20 00:53:15,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:53:15,689 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-20 00:53:15,689 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 00:53:15,689 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2020-10-20 00:53:15,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61352746] [2020-10-20 00:53:15,691 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-20 00:53:15,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:53:15,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-20 00:53:15,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-20 00:53:15,692 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand 12 states. [2020-10-20 00:53:15,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:53:15,923 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2020-10-20 00:53:15,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-20 00:53:15,924 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 23 [2020-10-20 00:53:15,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:53:15,924 INFO L225 Difference]: With dead ends: 39 [2020-10-20 00:53:15,924 INFO L226 Difference]: Without dead ends: 28 [2020-10-20 00:53:15,925 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2020-10-20 00:53:15,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-20 00:53:15,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-20 00:53:15,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-20 00:53:15,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2020-10-20 00:53:15,932 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 23 [2020-10-20 00:53:15,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:53:15,932 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2020-10-20 00:53:15,933 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-20 00:53:15,933 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2020-10-20 00:53:15,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-20 00:53:15,934 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:53:15,934 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:53:16,148 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 00:53:16,149 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:53:16,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:53:16,149 INFO L82 PathProgramCache]: Analyzing trace with hash -907290146, now seen corresponding path program 3 times [2020-10-20 00:53:16,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:53:16,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955858186] [2020-10-20 00:53:16,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:53:16,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:53:16,312 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-20 00:53:16,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955858186] [2020-10-20 00:53:16,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604861406] [2020-10-20 00:53:16,313 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 00:53:16,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-20 00:53:16,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 00:53:16,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-20 00:53:16,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:53:16,405 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-20 00:53:16,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 00:53:16,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-10-20 00:53:16,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141321641] [2020-10-20 00:53:16,407 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-20 00:53:16,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:53:16,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-20 00:53:16,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-20 00:53:16,407 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 8 states. [2020-10-20 00:53:16,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:53:16,523 INFO L93 Difference]: Finished difference Result 62 states and 68 transitions. [2020-10-20 00:53:16,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-20 00:53:16,523 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-10-20 00:53:16,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:53:16,524 INFO L225 Difference]: With dead ends: 62 [2020-10-20 00:53:16,524 INFO L226 Difference]: Without dead ends: 55 [2020-10-20 00:53:16,525 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-10-20 00:53:16,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-20 00:53:16,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 45. [2020-10-20 00:53:16,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-20 00:53:16,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51 transitions. [2020-10-20 00:53:16,534 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 51 transitions. Word has length 27 [2020-10-20 00:53:16,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:53:16,534 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 51 transitions. [2020-10-20 00:53:16,535 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-20 00:53:16,535 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 51 transitions. [2020-10-20 00:53:16,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-20 00:53:16,536 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:53:16,536 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:53:16,749 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 00:53:16,750 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:53:16,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:53:16,750 INFO L82 PathProgramCache]: Analyzing trace with hash 38835068, now seen corresponding path program 4 times [2020-10-20 00:53:16,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:53:16,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615428883] [2020-10-20 00:53:16,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:53:16,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 00:53:16,795 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 00:53:16,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 00:53:16,858 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 00:53:16,910 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 00:53:16,911 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-20 00:53:16,911 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-20 00:53:16,976 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 12:53:16 BoogieIcfgContainer [2020-10-20 00:53:16,976 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-20 00:53:16,977 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 00:53:16,977 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 00:53:16,977 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 00:53:16,978 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:53:13" (3/4) ... [2020-10-20 00:53:16,981 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-10-20 00:53:17,058 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-20 00:53:17,059 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 00:53:17,062 INFO L168 Benchmark]: Toolchain (without parser) took 4671.39 ms. Allocated memory was 38.8 MB in the beginning and 57.7 MB in the end (delta: 18.9 MB). Free memory was 15.7 MB in the beginning and 39.7 MB in the end (delta: -24.0 MB). Peak memory consumption was 23.6 MB. Max. memory is 14.3 GB. [2020-10-20 00:53:17,063 INFO L168 Benchmark]: CDTParser took 1.10 ms. Allocated memory is still 30.4 MB. Free memory was 6.8 MB in the beginning and 6.7 MB in the end (delta: 43.7 kB). Peak memory consumption was 43.7 kB. Max. memory is 14.3 GB. [2020-10-20 00:53:17,064 INFO L168 Benchmark]: CACSL2BoogieTranslator took 581.64 ms. Allocated memory was 38.8 MB in the beginning and 40.9 MB in the end (delta: 2.1 MB). Free memory was 14.9 MB in the beginning and 17.5 MB in the end (delta: -2.6 MB). Peak memory consumption was 6.7 MB. Max. memory is 14.3 GB. [2020-10-20 00:53:17,064 INFO L168 Benchmark]: Boogie Procedure Inliner took 57.11 ms. Allocated memory is still 40.9 MB. Free memory was 17.5 MB in the beginning and 15.3 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.2 MB. Max. memory is 14.3 GB. [2020-10-20 00:53:17,065 INFO L168 Benchmark]: Boogie Preprocessor took 31.23 ms. Allocated memory is still 40.9 MB. Free memory was 15.3 MB in the beginning and 13.6 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 14.3 GB. [2020-10-20 00:53:17,066 INFO L168 Benchmark]: RCFGBuilder took 389.09 ms. Allocated memory was 40.9 MB in the beginning and 41.4 MB in the end (delta: 524.3 kB). Free memory was 13.6 MB in the beginning and 11.1 MB in the end (delta: 2.5 MB). Peak memory consumption was 4.9 MB. Max. memory is 14.3 GB. [2020-10-20 00:53:17,066 INFO L168 Benchmark]: TraceAbstraction took 3518.34 ms. Allocated memory was 41.4 MB in the beginning and 55.6 MB in the end (delta: 14.2 MB). Free memory was 10.6 MB in the beginning and 12.2 MB in the end (delta: -1.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 14.3 GB. [2020-10-20 00:53:17,067 INFO L168 Benchmark]: Witness Printer took 82.11 ms. Allocated memory was 55.6 MB in the beginning and 57.7 MB in the end (delta: 2.1 MB). Free memory was 12.2 MB in the beginning and 39.7 MB in the end (delta: -27.5 MB). Peak memory consumption was 3.3 MB. Max. memory is 14.3 GB. [2020-10-20 00:53:17,070 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.10 ms. Allocated memory is still 30.4 MB. Free memory was 6.8 MB in the beginning and 6.7 MB in the end (delta: 43.7 kB). Peak memory consumption was 43.7 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 581.64 ms. Allocated memory was 38.8 MB in the beginning and 40.9 MB in the end (delta: 2.1 MB). Free memory was 14.9 MB in the beginning and 17.5 MB in the end (delta: -2.6 MB). Peak memory consumption was 6.7 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 57.11 ms. Allocated memory is still 40.9 MB. Free memory was 17.5 MB in the beginning and 15.3 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.2 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 31.23 ms. Allocated memory is still 40.9 MB. Free memory was 15.3 MB in the beginning and 13.6 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 14.3 GB. * RCFGBuilder took 389.09 ms. Allocated memory was 40.9 MB in the beginning and 41.4 MB in the end (delta: 524.3 kB). Free memory was 13.6 MB in the beginning and 11.1 MB in the end (delta: 2.5 MB). Peak memory consumption was 4.9 MB. Max. memory is 14.3 GB. * TraceAbstraction took 3518.34 ms. Allocated memory was 41.4 MB in the beginning and 55.6 MB in the end (delta: 14.2 MB). Free memory was 10.6 MB in the beginning and 12.2 MB in the end (delta: -1.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 14.3 GB. * Witness Printer took 82.11 ms. Allocated memory was 55.6 MB in the beginning and 57.7 MB in the end (delta: 2.1 MB). Free memory was 12.2 MB in the beginning and 39.7 MB in the end (delta: -27.5 MB). Peak memory consumption was 3.3 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: [L603] int len = 2; [L604] len < 32 && __VERIFIER_nondet_int() [L604] len < 32 && __VERIFIER_nondet_int() [L604] COND FALSE !(len < 32 && __VERIFIER_nondet_int()) [L575] SLL head = ((void *)0); [L576] COND TRUE len > 0 [L577] SLL new_head = (SLL) malloc(sizeof(struct node)); [L578] COND FALSE !(((void *)0) == new_head) [L581] new_head->next = head [L582] head = new_head [L583] len-- [L576] COND TRUE len > 0 [L577] SLL new_head = (SLL) malloc(sizeof(struct node)); [L578] COND FALSE !(((void *)0) == new_head) [L581] new_head->next = head [L582] head = new_head [L583] len-- [L576] COND TRUE len > 0 [L577] SLL new_head = (SLL) malloc(sizeof(struct node)); [L578] COND FALSE !(((void *)0) == new_head) [L581] new_head->next = head [L582] head = new_head [L583] len-- [L576] COND FALSE !(len > 0) [L585] return head; [L607] SLL s = sll_create(len + 1); [L588] int len = 0; [L589] COND TRUE \read(head) [L590] len++ [L591] EXPR head->next [L591] head = head->next [L589] COND TRUE \read(head) [L590] len++ [L591] EXPR head->next [L591] head = head->next [L589] COND TRUE \read(head) [L590] len++ [L591] EXPR head->next [L591] head = head->next [L589] COND FALSE !(\read(head)) [L593] return len; [L608] COND TRUE len != sll_length(s) [L12] COND FALSE !(0) [L12] __assert_fail ("0", "sll_length_check-1.c", 3, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 3.3s, OverallIterations: 8, TraceHistogramMax: 3, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 146 SDtfs, 218 SDslu, 348 SDs, 0 SdLazy, 258 SolverSat, 41 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 142 GetRequests, 90 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=45occurred in iteration=7, 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, 7 MinimizatonAttempts, 82 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 255 NumberOfCodeBlocks, 249 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 216 ConstructedInterpolants, 0 QuantifiedInterpolants, 11982 SizeOfPredicates, 12 NumberOfNonLiveVariables, 424 ConjunctsInSsa, 29 ConjunctsInUnsatCore, 11 InterpolantComputations, 4 PerfectInterpolantSequences, 33/53 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...