./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/list-properties/list_search-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_search-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 04611f7cb9bdc3bfbd4f2358731c54027c595e1d ................................................................................................................................................................................................................................................................................................................................ Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/list-properties/list_search-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 04611f7cb9bdc3bfbd4f2358731c54027c595e1d ........................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN --- Real Ultimate output --- This is Ultimate 0.1.25-9a8b2e8 [2020-10-20 00:42:33,058 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 00:42:33,060 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 00:42:33,084 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 00:42:33,085 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 00:42:33,086 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 00:42:33,088 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 00:42:33,090 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 00:42:33,102 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 00:42:33,105 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 00:42:33,106 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 00:42:33,108 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 00:42:33,111 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 00:42:33,112 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 00:42:33,115 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 00:42:33,120 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 00:42:33,121 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 00:42:33,124 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 00:42:33,126 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 00:42:33,130 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 00:42:33,135 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 00:42:33,138 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 00:42:33,140 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 00:42:33,143 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 00:42:33,145 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 00:42:33,149 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 00:42:33,149 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 00:42:33,150 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 00:42:33,152 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 00:42:33,153 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 00:42:33,158 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 00:42:33,159 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 00:42:33,160 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 00:42:33,162 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 00:42:33,165 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 00:42:33,165 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 00:42:33,168 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 00:42:33,168 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 00:42:33,168 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 00:42:33,171 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 00:42:33,172 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 00:42:33,174 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-20 00:42:33,213 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 00:42:33,214 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 00:42:33,216 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 00:42:33,217 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 00:42:33,217 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 00:42:33,217 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 00:42:33,218 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-20 00:42:33,218 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-20 00:42:33,218 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-20 00:42:33,218 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 00:42:33,219 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-20 00:42:33,220 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-20 00:42:33,220 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-20 00:42:33,221 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-20 00:42:33,221 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-20 00:42:33,221 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 00:42:33,221 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-20 00:42:33,222 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 00:42:33,222 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 00:42:33,222 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-20 00:42:33,223 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-20 00:42:33,223 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 00:42:33,223 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 00:42:33,223 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-20 00:42:33,224 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-20 00:42:33,224 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-20 00:42:33,224 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-20 00:42:33,224 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-20 00:42:33,225 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 00:42:33,225 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 -> 04611f7cb9bdc3bfbd4f2358731c54027c595e1d [2020-10-20 00:42:33,446 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 00:42:33,472 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 00:42:33,478 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 00:42:33,479 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 00:42:33,481 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 00:42:33,482 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-properties/list_search-1.i [2020-10-20 00:42:33,552 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0584596ea/ec50effdd46444e19738c8bf1438cdd8/FLAG7afe3ae60 [2020-10-20 00:42:34,107 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 00:42:34,108 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-properties/list_search-1.i [2020-10-20 00:42:34,130 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0584596ea/ec50effdd46444e19738c8bf1438cdd8/FLAG7afe3ae60 [2020-10-20 00:42:34,336 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0584596ea/ec50effdd46444e19738c8bf1438cdd8 [2020-10-20 00:42:34,340 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 00:42:34,347 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-20 00:42:34,353 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 00:42:34,353 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 00:42:34,358 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 00:42:34,359 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:42:34" (1/1) ... [2020-10-20 00:42:34,363 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56f744e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:42:34, skipping insertion in model container [2020-10-20 00:42:34,364 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:42:34" (1/1) ... [2020-10-20 00:42:34,373 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 00:42:34,409 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 00:42:34,806 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:42:34,821 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 00:42:34,915 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:42:34,984 INFO L208 MainTranslator]: Completed translation [2020-10-20 00:42:34,986 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:42:34 WrapperNode [2020-10-20 00:42:34,986 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 00:42:34,987 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-20 00:42:34,988 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-20 00:42:34,988 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-20 00:42:34,997 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:42:34" (1/1) ... [2020-10-20 00:42:35,025 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:42:34" (1/1) ... [2020-10-20 00:42:35,053 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-20 00:42:35,054 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 00:42:35,054 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 00:42:35,055 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 00:42:35,065 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:42:34" (1/1) ... [2020-10-20 00:42:35,065 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:42:34" (1/1) ... [2020-10-20 00:42:35,069 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:42:34" (1/1) ... [2020-10-20 00:42:35,070 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:42:34" (1/1) ... [2020-10-20 00:42:35,079 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:42:34" (1/1) ... [2020-10-20 00:42:35,084 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:42:34" (1/1) ... [2020-10-20 00:42:35,087 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:42:34" (1/1) ... [2020-10-20 00:42:35,091 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 00:42:35,091 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 00:42:35,091 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 00:42:35,092 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 00:42:35,093 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:42:34" (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 00:42:35,168 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-20 00:42:35,169 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-20 00:42:35,169 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-20 00:42:35,169 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-20 00:42:35,170 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-20 00:42:35,170 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-20 00:42:35,170 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-20 00:42:35,170 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-20 00:42:35,170 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 00:42:35,171 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 00:42:35,678 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 00:42:35,678 INFO L298 CfgBuilder]: Removed 20 assume(true) statements. [2020-10-20 00:42:35,680 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:42:35 BoogieIcfgContainer [2020-10-20 00:42:35,681 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 00:42:35,682 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-20 00:42:35,682 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-20 00:42:35,686 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-20 00:42:35,686 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 12:42:34" (1/3) ... [2020-10-20 00:42:35,687 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f1d156b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:42:35, skipping insertion in model container [2020-10-20 00:42:35,688 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:42:34" (2/3) ... [2020-10-20 00:42:35,688 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f1d156b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:42:35, skipping insertion in model container [2020-10-20 00:42:35,688 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:42:35" (3/3) ... [2020-10-20 00:42:35,690 INFO L111 eAbstractionObserver]: Analyzing ICFG list_search-1.i [2020-10-20 00:42:35,703 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-20 00:42:35,711 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-20 00:42:35,726 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-20 00:42:35,751 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-20 00:42:35,751 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-20 00:42:35,751 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-20 00:42:35,751 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 00:42:35,752 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 00:42:35,752 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-20 00:42:35,752 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 00:42:35,752 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-20 00:42:35,765 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-10-20 00:42:35,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-20 00:42:35,771 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:42:35,772 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:42:35,773 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:42:35,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:42:35,779 INFO L82 PathProgramCache]: Analyzing trace with hash -1395670938, now seen corresponding path program 1 times [2020-10-20 00:42:35,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:42:35,788 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852440846] [2020-10-20 00:42:35,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:42:35,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:42:36,090 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 00:42:36,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852440846] [2020-10-20 00:42:36,095 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:42:36,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 00:42:36,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166603704] [2020-10-20 00:42:36,102 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 00:42:36,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:42:36,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 00:42:36,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 00:42:36,118 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 4 states. [2020-10-20 00:42:36,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:42:36,210 INFO L93 Difference]: Finished difference Result 54 states and 74 transitions. [2020-10-20 00:42:36,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 00:42:36,212 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-10-20 00:42:36,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:42:36,222 INFO L225 Difference]: With dead ends: 54 [2020-10-20 00:42:36,223 INFO L226 Difference]: Without dead ends: 24 [2020-10-20 00:42:36,226 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 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 00:42:36,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-20 00:42:36,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-20 00:42:36,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-20 00:42:36,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-10-20 00:42:36,265 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 21 [2020-10-20 00:42:36,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:42:36,266 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-10-20 00:42:36,266 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 00:42:36,267 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-10-20 00:42:36,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-20 00:42:36,268 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:42:36,268 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:42:36,268 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-20 00:42:36,269 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:42:36,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:42:36,269 INFO L82 PathProgramCache]: Analyzing trace with hash 884093789, now seen corresponding path program 1 times [2020-10-20 00:42:36,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:42:36,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586007844] [2020-10-20 00:42:36,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:42:36,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:42:36,406 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 00:42:36,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586007844] [2020-10-20 00:42:36,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:42:36,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-20 00:42:36,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208165140] [2020-10-20 00:42:36,409 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-20 00:42:36,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:42:36,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-20 00:42:36,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-20 00:42:36,410 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 6 states. [2020-10-20 00:42:36,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:42:36,560 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2020-10-20 00:42:36,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-20 00:42:36,570 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-10-20 00:42:36,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:42:36,572 INFO L225 Difference]: With dead ends: 44 [2020-10-20 00:42:36,572 INFO L226 Difference]: Without dead ends: 34 [2020-10-20 00:42:36,573 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 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 00:42:36,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-20 00:42:36,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 26. [2020-10-20 00:42:36,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-20 00:42:36,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2020-10-20 00:42:36,581 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 23 [2020-10-20 00:42:36,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:42:36,581 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2020-10-20 00:42:36,582 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-20 00:42:36,582 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2020-10-20 00:42:36,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-20 00:42:36,583 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:42:36,583 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:42:36,583 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-20 00:42:36,584 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:42:36,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:42:36,584 INFO L82 PathProgramCache]: Analyzing trace with hash 1693440415, now seen corresponding path program 1 times [2020-10-20 00:42:36,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:42:36,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620277230] [2020-10-20 00:42:36,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:42:36,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:42:36,710 ERROR L253 erpolLogProxyWrapper]: Interpolant 18 not inductive [2020-10-20 00:42:36,711 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-20 00:42:36,712 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: generated interpolants did not pass sanity check at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.getInterpolants(Interpolator.java:219) at de.uni_freiburg.informatik.ultimate.smtinterpol.smtlib2.SMTInterpol.getInterpolants(SMTInterpol.java:876) at de.uni_freiburg.informatik.ultimate.logic.NoopScript.getInterpolants(NoopScript.java:392) at de.uni_freiburg.informatik.ultimate.logic.NoopScript.getInterpolants(NoopScript.java:386) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.getInterpolants(WrapperScript.java:337) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.getInterpolants(WrapperScript.java:337) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.getInterpolants(ManagedScript.java:191) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedInterpolantsBuilder.computeCraigInterpolants(NestedInterpolantsBuilder.java:285) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedInterpolantsBuilder.(NestedInterpolantsBuilder.java:166) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolantsRecursive(InterpolatingTraceCheckCraig.java:326) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolants(InterpolatingTraceCheckCraig.java:228) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.(InterpolatingTraceCheckCraig.java:97) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleCraig.construct(IpTcStrategyModuleCraig.java:79) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleCraig.construct(IpTcStrategyModuleCraig.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:241) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:341) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:182) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:134) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2020-10-20 00:42:36,725 INFO L168 Benchmark]: Toolchain (without parser) took 2379.76 ms. Allocated memory was 35.7 MB in the beginning and 52.4 MB in the end (delta: 16.8 MB). Free memory was 11.9 MB in the beginning and 23.6 MB in the end (delta: -11.7 MB). Peak memory consumption was 5.1 MB. Max. memory is 14.3 GB. [2020-10-20 00:42:36,727 INFO L168 Benchmark]: CDTParser took 0.78 ms. Allocated memory is still 33.6 MB. Free memory was 18.9 MB in the beginning and 18.8 MB in the end (delta: 68.0 kB). Peak memory consumption was 34.2 kB. Max. memory is 14.3 GB. [2020-10-20 00:42:36,730 INFO L168 Benchmark]: CACSL2BoogieTranslator took 633.09 ms. Allocated memory was 35.7 MB in the beginning and 46.1 MB in the end (delta: 10.5 MB). Free memory was 11.0 MB in the beginning and 24.0 MB in the end (delta: -13.0 MB). Peak memory consumption was 10.6 MB. Max. memory is 14.3 GB. [2020-10-20 00:42:36,731 INFO L168 Benchmark]: Boogie Procedure Inliner took 66.43 ms. Allocated memory is still 46.1 MB. Free memory was 23.8 MB in the beginning and 21.6 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.2 MB. Max. memory is 14.3 GB. [2020-10-20 00:42:36,732 INFO L168 Benchmark]: Boogie Preprocessor took 36.77 ms. Allocated memory is still 46.1 MB. Free memory was 21.6 MB in the beginning and 19.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 14.3 GB. [2020-10-20 00:42:36,735 INFO L168 Benchmark]: RCFGBuilder took 589.55 ms. Allocated memory was 46.1 MB in the beginning and 48.2 MB in the end (delta: 2.1 MB). Free memory was 19.5 MB in the beginning and 26.7 MB in the end (delta: -7.2 MB). Peak memory consumption was 9.5 MB. Max. memory is 14.3 GB. [2020-10-20 00:42:36,739 INFO L168 Benchmark]: TraceAbstraction took 1037.50 ms. Allocated memory was 48.2 MB in the beginning and 52.4 MB in the end (delta: 4.2 MB). Free memory was 26.1 MB in the beginning and 23.6 MB in the end (delta: 2.5 MB). Peak memory consumption was 6.7 MB. Max. memory is 14.3 GB. [2020-10-20 00:42:36,749 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.78 ms. Allocated memory is still 33.6 MB. Free memory was 18.9 MB in the beginning and 18.8 MB in the end (delta: 68.0 kB). Peak memory consumption was 34.2 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 633.09 ms. Allocated memory was 35.7 MB in the beginning and 46.1 MB in the end (delta: 10.5 MB). Free memory was 11.0 MB in the beginning and 24.0 MB in the end (delta: -13.0 MB). Peak memory consumption was 10.6 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 66.43 ms. Allocated memory is still 46.1 MB. Free memory was 23.8 MB in the beginning and 21.6 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.2 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 36.77 ms. Allocated memory is still 46.1 MB. Free memory was 21.6 MB in the beginning and 19.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 14.3 GB. * RCFGBuilder took 589.55 ms. Allocated memory was 46.1 MB in the beginning and 48.2 MB in the end (delta: 2.1 MB). Free memory was 19.5 MB in the beginning and 26.7 MB in the end (delta: -7.2 MB). Peak memory consumption was 9.5 MB. Max. memory is 14.3 GB. * TraceAbstraction took 1037.50 ms. Allocated memory was 48.2 MB in the beginning and 52.4 MB in the end (delta: 4.2 MB). Free memory was 26.1 MB in the beginning and 23.6 MB in the end (delta: 2.5 MB). Peak memory consumption was 6.7 MB. Max. memory is 14.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: generated interpolants did not pass sanity check de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: generated interpolants did not pass sanity check: de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.getInterpolants(Interpolator.java:219) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... ### Bit-precise run ### This is Ultimate 0.1.25-9a8b2e8 [2020-10-20 00:42:38,950 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 00:42:38,953 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 00:42:38,982 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 00:42:38,982 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 00:42:38,983 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 00:42:38,984 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 00:42:38,986 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 00:42:38,998 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 00:42:38,999 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 00:42:39,003 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 00:42:39,004 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 00:42:39,007 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 00:42:39,008 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 00:42:39,009 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 00:42:39,013 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 00:42:39,014 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 00:42:39,015 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 00:42:39,018 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 00:42:39,020 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 00:42:39,022 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 00:42:39,023 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 00:42:39,024 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 00:42:39,025 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 00:42:39,028 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 00:42:39,028 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 00:42:39,028 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 00:42:39,029 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 00:42:39,030 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 00:42:39,031 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 00:42:39,031 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 00:42:39,032 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 00:42:39,032 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 00:42:39,033 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 00:42:39,034 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 00:42:39,034 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 00:42:39,035 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 00:42:39,035 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 00:42:39,036 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 00:42:39,037 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 00:42:39,037 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 00:42:39,038 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2020-10-20 00:42:39,061 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 00:42:39,061 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 00:42:39,063 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 00:42:39,063 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 00:42:39,063 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 00:42:39,063 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 00:42:39,064 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-20 00:42:39,064 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-20 00:42:39,064 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 00:42:39,064 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-20 00:42:39,065 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-20 00:42:39,065 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-20 00:42:39,065 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-10-20 00:42:39,065 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-10-20 00:42:39,066 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-20 00:42:39,066 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-20 00:42:39,066 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 00:42:39,066 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-20 00:42:39,067 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 00:42:39,067 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 00:42:39,067 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-20 00:42:39,067 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-20 00:42:39,068 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 00:42:39,068 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 00:42:39,068 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-20 00:42:39,069 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-20 00:42:39,069 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2020-10-20 00:42:39,069 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-10-20 00:42:39,069 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-20 00:42:39,070 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 00:42:39,070 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-20 00:42:39,070 INFO L138 SettingsManager]: * Logic for external solver=AUFBV Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 04611f7cb9bdc3bfbd4f2358731c54027c595e1d [2020-10-20 00:42:39,283 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 00:42:39,303 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 00:42:39,307 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 00:42:39,309 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 00:42:39,309 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 00:42:39,310 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-properties/list_search-1.i [2020-10-20 00:42:39,390 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bb6b20db2/fecbaf1658cf4fd3a47241e7f37151ed/FLAG9143a9106 [2020-10-20 00:42:39,959 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 00:42:39,961 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-properties/list_search-1.i [2020-10-20 00:42:39,981 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bb6b20db2/fecbaf1658cf4fd3a47241e7f37151ed/FLAG9143a9106 [2020-10-20 00:42:40,205 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bb6b20db2/fecbaf1658cf4fd3a47241e7f37151ed [2020-10-20 00:42:40,209 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 00:42:40,216 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-20 00:42:40,217 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 00:42:40,217 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 00:42:40,221 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 00:42:40,222 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:42:40" (1/1) ... [2020-10-20 00:42:40,225 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58e96b4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:42:40, skipping insertion in model container [2020-10-20 00:42:40,225 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:42:40" (1/1) ... [2020-10-20 00:42:40,233 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 00:42:40,277 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 00:42:40,746 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:42:40,769 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 00:42:40,847 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:42:40,918 INFO L208 MainTranslator]: Completed translation [2020-10-20 00:42:40,918 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:42:40 WrapperNode [2020-10-20 00:42:40,919 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 00:42:40,919 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-20 00:42:40,920 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-20 00:42:40,920 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-20 00:42:40,929 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:42:40" (1/1) ... [2020-10-20 00:42:40,949 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:42:40" (1/1) ... [2020-10-20 00:42:40,976 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-20 00:42:40,977 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 00:42:40,977 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 00:42:40,977 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 00:42:40,986 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:42:40" (1/1) ... [2020-10-20 00:42:40,986 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:42:40" (1/1) ... [2020-10-20 00:42:40,993 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:42:40" (1/1) ... [2020-10-20 00:42:40,993 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:42:40" (1/1) ... [2020-10-20 00:42:41,005 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:42:40" (1/1) ... [2020-10-20 00:42:41,010 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:42:40" (1/1) ... [2020-10-20 00:42:41,015 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:42:40" (1/1) ... [2020-10-20 00:42:41,023 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 00:42:41,024 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 00:42:41,026 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 00:42:41,026 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 00:42:41,027 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:42:40" (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 00:42:41,089 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2020-10-20 00:42:41,091 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-20 00:42:41,091 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-20 00:42:41,091 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-20 00:42:41,091 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-20 00:42:41,091 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-20 00:42:41,091 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2020-10-20 00:42:41,092 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-10-20 00:42:41,092 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 00:42:41,093 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 00:42:41,647 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 00:42:41,648 INFO L298 CfgBuilder]: Removed 20 assume(true) statements. [2020-10-20 00:42:41,650 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:42:41 BoogieIcfgContainer [2020-10-20 00:42:41,650 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 00:42:41,651 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-20 00:42:41,652 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-20 00:42:41,655 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-20 00:42:41,656 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 12:42:40" (1/3) ... [2020-10-20 00:42:41,657 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b29f25e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:42:41, skipping insertion in model container [2020-10-20 00:42:41,657 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:42:40" (2/3) ... [2020-10-20 00:42:41,657 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b29f25e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:42:41, skipping insertion in model container [2020-10-20 00:42:41,658 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:42:41" (3/3) ... [2020-10-20 00:42:41,661 INFO L111 eAbstractionObserver]: Analyzing ICFG list_search-1.i [2020-10-20 00:42:41,672 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-20 00:42:41,679 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-20 00:42:41,689 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-20 00:42:41,710 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-20 00:42:41,710 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-20 00:42:41,710 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-20 00:42:41,711 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 00:42:41,711 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 00:42:41,711 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-20 00:42:41,711 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 00:42:41,711 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-20 00:42:41,724 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-10-20 00:42:41,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-20 00:42:41,730 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:42:41,731 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:42:41,731 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:42:41,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:42:41,736 INFO L82 PathProgramCache]: Analyzing trace with hash -1395670938, now seen corresponding path program 1 times [2020-10-20 00:42:41,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-20 00:42:41,748 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [992686335] [2020-10-20 00:42:41,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2020-10-20 00:42:41,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:42:41,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 1 conjunts are in the unsatisfiable core [2020-10-20 00:42:41,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:42:41,943 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 00:42:41,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-20 00:42:41,949 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 00:42:41,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [992686335] [2020-10-20 00:42:41,952 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:42:41,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-10-20 00:42:41,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682924783] [2020-10-20 00:42:41,958 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-20 00:42:41,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-20 00:42:41,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-20 00:42:41,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-20 00:42:41,976 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 2 states. [2020-10-20 00:42:41,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:42:41,996 INFO L93 Difference]: Finished difference Result 42 states and 55 transitions. [2020-10-20 00:42:41,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-20 00:42:41,998 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 21 [2020-10-20 00:42:42,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:42:42,024 INFO L225 Difference]: With dead ends: 42 [2020-10-20 00:42:42,024 INFO L226 Difference]: Without dead ends: 24 [2020-10-20 00:42:42,027 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 40 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 00:42:42,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-20 00:42:42,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-20 00:42:42,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-20 00:42:42,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2020-10-20 00:42:42,065 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 21 [2020-10-20 00:42:42,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:42:42,065 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2020-10-20 00:42:42,065 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-20 00:42:42,065 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2020-10-20 00:42:42,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-20 00:42:42,066 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:42:42,066 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:42:42,279 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-10-20 00:42:42,280 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:42:42,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:42:42,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1905792029, now seen corresponding path program 1 times [2020-10-20 00:42:42,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-20 00:42:42,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1393382776] [2020-10-20 00:42:42,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2020-10-20 00:42:42,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:42:42,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-20 00:42:42,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:42:42,444 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 00:42:42,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-20 00:42:42,451 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 00:42:42,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1393382776] [2020-10-20 00:42:42,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:42:42,452 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2020-10-20 00:42:42,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746219291] [2020-10-20 00:42:42,453 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 00:42:42,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-20 00:42:42,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 00:42:42,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 00:42:42,454 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand 4 states. [2020-10-20 00:42:42,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:42:42,641 INFO L93 Difference]: Finished difference Result 42 states and 50 transitions. [2020-10-20 00:42:42,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 00:42:42,642 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-10-20 00:42:42,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:42:42,643 INFO L225 Difference]: With dead ends: 42 [2020-10-20 00:42:42,643 INFO L226 Difference]: Without dead ends: 24 [2020-10-20 00:42:42,645 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 43 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 00:42:42,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-20 00:42:42,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-20 00:42:42,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-20 00:42:42,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-10-20 00:42:42,657 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 23 [2020-10-20 00:42:42,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:42:42,657 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-10-20 00:42:42,657 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 00:42:42,658 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-10-20 00:42:42,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-20 00:42:42,659 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:42:42,660 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:42:42,875 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-10-20 00:42:42,876 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:42:42,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:42:42,877 INFO L82 PathProgramCache]: Analyzing trace with hash 884093789, now seen corresponding path program 1 times [2020-10-20 00:42:42,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-20 00:42:42,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1360617748] [2020-10-20 00:42:42,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2020-10-20 00:42:43,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:42:43,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-20 00:42:43,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:42:43,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1360617748] [2020-10-20 00:42:43,099 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: no int: (_ BitVec 32) [2020-10-20 00:42:43,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [883212999] [2020-10-20 00:42:43,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-20 00:42:43,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:42:43,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-20 00:42:43,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:42:43,268 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: no int: (_ BitVec 32) [2020-10-20 00:42:43,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70447688] [2020-10-20 00:42:43,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 00:42:43,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:42:43,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-20 00:42:43,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:42:43,369 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: no int: (_ BitVec 32) [2020-10-20 00:42:43,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:42:43,370 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2020-10-20 00:42:43,370 ERROR L205 FreeRefinementEngine]: Strategy WOLF failed to provide any proof altough trace is infeasible [2020-10-20 00:42:43,371 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-20 00:42:43,991 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3,5 cvc4 --incremental --print-success --lang smt --rewrite-divk,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 00:42:44,013 WARN L238 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-10-20 00:42:44,014 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 12:42:44 BoogieIcfgContainer [2020-10-20 00:42:44,014 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-20 00:42:44,014 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 00:42:44,014 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 00:42:44,015 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 00:42:44,015 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:42:41" (3/4) ... [2020-10-20 00:42:44,018 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-10-20 00:42:44,018 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 00:42:44,021 INFO L168 Benchmark]: Toolchain (without parser) took 3809.32 ms. Allocated memory was 35.1 MB in the beginning and 54.0 MB in the end (delta: 18.9 MB). Free memory was 11.6 MB in the beginning and 13.0 MB in the end (delta: -1.4 MB). Peak memory consumption was 17.4 MB. Max. memory is 14.3 GB. [2020-10-20 00:42:44,022 INFO L168 Benchmark]: CDTParser took 0.34 ms. Allocated memory is still 33.6 MB. Free memory was 18.7 MB in the beginning and 18.7 MB in the end (delta: 30.4 kB). Peak memory consumption was 30.4 kB. Max. memory is 14.3 GB. [2020-10-20 00:42:44,023 INFO L168 Benchmark]: CACSL2BoogieTranslator took 702.06 ms. Allocated memory was 35.1 MB in the beginning and 44.6 MB in the end (delta: 9.4 MB). Free memory was 10.7 MB in the beginning and 19.2 MB in the end (delta: -8.5 MB). Peak memory consumption was 10.3 MB. Max. memory is 14.3 GB. [2020-10-20 00:42:44,025 INFO L168 Benchmark]: Boogie Procedure Inliner took 57.24 ms. Allocated memory is still 44.6 MB. Free memory was 19.2 MB in the beginning and 16.8 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 14.3 GB. [2020-10-20 00:42:44,026 INFO L168 Benchmark]: Boogie Preprocessor took 46.56 ms. Allocated memory is still 44.6 MB. Free memory was 16.8 MB in the beginning and 14.6 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.2 MB. Max. memory is 14.3 GB. [2020-10-20 00:42:44,027 INFO L168 Benchmark]: RCFGBuilder took 626.27 ms. Allocated memory was 44.6 MB in the beginning and 48.2 MB in the end (delta: 3.7 MB). Free memory was 14.6 MB in the beginning and 20.8 MB in the end (delta: -6.2 MB). Peak memory consumption was 5.5 MB. Max. memory is 14.3 GB. [2020-10-20 00:42:44,028 INFO L168 Benchmark]: TraceAbstraction took 2362.72 ms. Allocated memory was 48.2 MB in the beginning and 54.0 MB in the end (delta: 5.8 MB). Free memory was 20.2 MB in the beginning and 13.4 MB in the end (delta: 6.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 14.3 GB. [2020-10-20 00:42:44,028 INFO L168 Benchmark]: Witness Printer took 3.91 ms. Allocated memory is still 54.0 MB. Free memory was 13.4 MB in the beginning and 13.0 MB in the end (delta: 421.4 kB). Peak memory consumption was 421.4 kB. Max. memory is 14.3 GB. [2020-10-20 00:42:44,033 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34 ms. Allocated memory is still 33.6 MB. Free memory was 18.7 MB in the beginning and 18.7 MB in the end (delta: 30.4 kB). Peak memory consumption was 30.4 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 702.06 ms. Allocated memory was 35.1 MB in the beginning and 44.6 MB in the end (delta: 9.4 MB). Free memory was 10.7 MB in the beginning and 19.2 MB in the end (delta: -8.5 MB). Peak memory consumption was 10.3 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 57.24 ms. Allocated memory is still 44.6 MB. Free memory was 19.2 MB in the beginning and 16.8 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 46.56 ms. Allocated memory is still 44.6 MB. Free memory was 16.8 MB in the beginning and 14.6 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.2 MB. Max. memory is 14.3 GB. * RCFGBuilder took 626.27 ms. Allocated memory was 44.6 MB in the beginning and 48.2 MB in the end (delta: 3.7 MB). Free memory was 14.6 MB in the beginning and 20.8 MB in the end (delta: -6.2 MB). Peak memory consumption was 5.5 MB. Max. memory is 14.3 GB. * TraceAbstraction took 2362.72 ms. Allocated memory was 48.2 MB in the beginning and 54.0 MB in the end (delta: 5.8 MB). Free memory was 20.2 MB in the beginning and 13.4 MB in the end (delta: 6.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 14.3 GB. * Witness Printer took 3.91 ms. Allocated memory is still 54.0 MB. Free memory was 13.4 MB in the beginning and 13.0 MB in the end (delta: 421.4 kB). Peak memory consumption was 421.4 kB. Max. memory is 14.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 12]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L533] mlist *head; [L554] int i; [L555] mlist *mylist, *temp; [L542] l = (mlist*)malloc(sizeof(mlist)) [L543] l->key = k [L544] COND TRUE head==((void *)0) [L545] l->next = ((void *)0) [L550] head = l [L551] return 0; [L542] l = (mlist*)malloc(sizeof(mlist)) [L543] l->key = k [L544] COND FALSE !(head==((void *)0)) [L547] l->key = k [L548] l->next = head [L550] head = l [L551] return 0; [L542] l = (mlist*)malloc(sizeof(mlist)) [L543] l->key = k [L544] COND FALSE !(head==((void *)0)) [L547] l->key = k [L548] l->next = head [L550] head = l [L551] return 0; [L542] l = (mlist*)malloc(sizeof(mlist)) [L543] l->key = k [L544] COND FALSE !(head==((void *)0)) [L547] l->key = k [L548] l->next = head [L550] head = l [L551] return 0; [L535] l = head [L536] l!=((void *)0) && l->key!=k [L536] COND FALSE !(l!=((void *)0) && l->key!=k) [L539] return l; [L560] temp = search_list(head,2) [L561] temp->key [L14] COND TRUE !(cond) [L12] COND FALSE !(0) [L12] __assert_fail ("0", "list_search-1.c", 3, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 2.2s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 51 SDtfs, 34 SDslu, 2 SDs, 0 SdLazy, 13 SolverSat, 11 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 86 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=30occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 44 NumberOfCodeBlocks, 44 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 84 ConstructedInterpolants, 0 QuantifiedInterpolants, 2296 SizeOfPredicates, 2 NumberOfNonLiveVariables, 264 ConjunctsInSsa, 5 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...