./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/verifythis/lcp.c --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/verifythis/lcp.c -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 99469a4d9e5d9407366653a2d47248a07b3d0735 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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/verifythis/lcp.c -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 99469a4d9e5d9407366653a2d47248a07b3d0735 ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 01:09:44,860 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 01:09:44,862 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 01:09:44,901 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 01:09:44,902 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 01:09:44,910 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 01:09:44,913 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 01:09:44,916 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 01:09:44,918 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 01:09:44,921 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 01:09:44,923 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 01:09:44,924 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 01:09:44,924 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 01:09:44,928 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 01:09:44,929 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 01:09:44,931 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 01:09:44,932 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 01:09:44,933 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 01:09:44,935 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 01:09:44,942 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 01:09:44,944 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 01:09:44,945 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 01:09:44,946 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 01:09:44,947 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 01:09:44,960 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 01:09:44,961 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 01:09:44,961 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 01:09:44,962 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 01:09:44,965 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 01:09:44,966 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 01:09:44,966 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 01:09:44,967 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 01:09:44,968 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 01:09:44,970 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 01:09:44,971 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 01:09:44,973 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 01:09:44,974 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 01:09:44,974 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 01:09:44,976 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 01:09:44,977 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 01:09:44,978 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 01:09:44,979 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-20 01:09:45,019 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 01:09:45,019 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 01:09:45,020 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 01:09:45,021 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 01:09:45,021 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 01:09:45,021 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 01:09:45,021 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-20 01:09:45,021 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-20 01:09:45,022 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-20 01:09:45,022 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 01:09:45,022 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-20 01:09:45,022 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-20 01:09:45,022 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-20 01:09:45,022 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-20 01:09:45,023 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-20 01:09:45,023 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 01:09:45,023 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-20 01:09:45,023 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 01:09:45,023 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 01:09:45,024 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-20 01:09:45,024 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-20 01:09:45,024 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 01:09:45,024 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 01:09:45,024 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-20 01:09:45,025 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-20 01:09:45,025 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-20 01:09:45,025 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-20 01:09:45,025 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-20 01:09:45,025 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 01:09:45,025 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 -> 99469a4d9e5d9407366653a2d47248a07b3d0735 [2020-10-20 01:09:45,252 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 01:09:45,267 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 01:09:45,271 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 01:09:45,273 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 01:09:45,274 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 01:09:45,275 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/verifythis/lcp.c [2020-10-20 01:09:45,346 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e44f0f062/ae09676044164091b076dbd96e01de07/FLAG3bef0d1c0 [2020-10-20 01:09:45,859 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 01:09:45,860 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/lcp.c [2020-10-20 01:09:45,872 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e44f0f062/ae09676044164091b076dbd96e01de07/FLAG3bef0d1c0 [2020-10-20 01:09:46,239 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e44f0f062/ae09676044164091b076dbd96e01de07 [2020-10-20 01:09:46,243 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 01:09:46,251 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-20 01:09:46,254 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 01:09:46,254 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 01:09:46,258 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 01:09:46,260 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 01:09:46" (1/1) ... [2020-10-20 01:09:46,263 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1da38a5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:09:46, skipping insertion in model container [2020-10-20 01:09:46,263 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 01:09:46" (1/1) ... [2020-10-20 01:09:46,273 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 01:09:46,295 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 01:09:46,591 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 01:09:46,607 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 01:09:46,633 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 01:09:46,662 INFO L208 MainTranslator]: Completed translation [2020-10-20 01:09:46,662 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:09:46 WrapperNode [2020-10-20 01:09:46,662 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 01:09:46,663 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-20 01:09:46,664 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-20 01:09:46,664 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-20 01:09:46,671 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:09:46" (1/1) ... [2020-10-20 01:09:46,682 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:09:46" (1/1) ... [2020-10-20 01:09:46,711 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-20 01:09:46,712 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 01:09:46,712 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 01:09:46,712 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 01:09:46,720 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:09:46" (1/1) ... [2020-10-20 01:09:46,720 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:09:46" (1/1) ... [2020-10-20 01:09:46,723 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:09:46" (1/1) ... [2020-10-20 01:09:46,724 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:09:46" (1/1) ... [2020-10-20 01:09:46,731 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:09:46" (1/1) ... [2020-10-20 01:09:46,736 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:09:46" (1/1) ... [2020-10-20 01:09:46,738 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:09:46" (1/1) ... [2020-10-20 01:09:46,742 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 01:09:46,742 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 01:09:46,742 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 01:09:46,742 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 01:09:46,743 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:09:46" (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 01:09:46,808 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-20 01:09:46,808 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-20 01:09:46,809 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-20 01:09:46,809 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 01:09:46,809 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 01:09:46,809 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-20 01:09:46,809 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-20 01:09:47,164 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 01:09:47,164 INFO L298 CfgBuilder]: Removed 25 assume(true) statements. [2020-10-20 01:09:47,167 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 01:09:47 BoogieIcfgContainer [2020-10-20 01:09:47,167 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 01:09:47,169 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-20 01:09:47,169 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-20 01:09:47,175 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-20 01:09:47,175 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 01:09:46" (1/3) ... [2020-10-20 01:09:47,176 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15935a06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 01:09:47, skipping insertion in model container [2020-10-20 01:09:47,177 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:09:46" (2/3) ... [2020-10-20 01:09:47,177 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15935a06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 01:09:47, skipping insertion in model container [2020-10-20 01:09:47,177 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 01:09:47" (3/3) ... [2020-10-20 01:09:47,180 INFO L111 eAbstractionObserver]: Analyzing ICFG lcp.c [2020-10-20 01:09:47,198 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-20 01:09:47,208 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-10-20 01:09:47,226 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-20 01:09:47,265 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-20 01:09:47,265 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-20 01:09:47,265 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-20 01:09:47,266 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 01:09:47,266 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 01:09:47,266 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-20 01:09:47,267 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 01:09:47,267 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-20 01:09:47,307 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-10-20 01:09:47,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-20 01:09:47,315 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:09:47,316 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:09:47,317 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:09:47,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:09:47,324 INFO L82 PathProgramCache]: Analyzing trace with hash 1579702917, now seen corresponding path program 1 times [2020-10-20 01:09:47,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:09:47,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677354625] [2020-10-20 01:09:47,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:09:47,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:09:47,491 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 01:09:47,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677354625] [2020-10-20 01:09:47,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 01:09:47,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-20 01:09:47,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811333772] [2020-10-20 01:09:47,500 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-20 01:09:47,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:09:47,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-20 01:09:47,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-20 01:09:47,517 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 2 states. [2020-10-20 01:09:47,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:09:47,535 INFO L93 Difference]: Finished difference Result 53 states and 68 transitions. [2020-10-20 01:09:47,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-20 01:09:47,537 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 14 [2020-10-20 01:09:47,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:09:47,547 INFO L225 Difference]: With dead ends: 53 [2020-10-20 01:09:47,547 INFO L226 Difference]: Without dead ends: 22 [2020-10-20 01:09:47,551 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 01:09:47,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-20 01:09:47,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-10-20 01:09:47,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-20 01:09:47,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-10-20 01:09:47,581 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 14 [2020-10-20 01:09:47,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:09:47,582 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-10-20 01:09:47,582 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-20 01:09:47,582 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-10-20 01:09:47,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-20 01:09:47,583 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:09:47,583 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:09:47,584 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-20 01:09:47,584 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:09:47,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:09:47,585 INFO L82 PathProgramCache]: Analyzing trace with hash 588290746, now seen corresponding path program 1 times [2020-10-20 01:09:47,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:09:47,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542599993] [2020-10-20 01:09:47,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:09:47,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:09:47,779 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 01:09:47,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542599993] [2020-10-20 01:09:47,780 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 01:09:47,780 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-20 01:09:47,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773749610] [2020-10-20 01:09:47,782 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-20 01:09:47,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:09:47,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-20 01:09:47,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-20 01:09:47,784 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 6 states. [2020-10-20 01:09:47,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:09:47,888 INFO L93 Difference]: Finished difference Result 35 states and 36 transitions. [2020-10-20 01:09:47,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-20 01:09:47,889 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-10-20 01:09:47,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:09:47,890 INFO L225 Difference]: With dead ends: 35 [2020-10-20 01:09:47,890 INFO L226 Difference]: Without dead ends: 23 [2020-10-20 01:09:47,892 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 01:09:47,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-20 01:09:47,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-20 01:09:47,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-20 01:09:47,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2020-10-20 01:09:47,898 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 16 [2020-10-20 01:09:47,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:09:47,899 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2020-10-20 01:09:47,899 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-20 01:09:47,899 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-10-20 01:09:47,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-20 01:09:47,900 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:09:47,900 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:09:47,901 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-20 01:09:47,901 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:09:47,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:09:47,901 INFO L82 PathProgramCache]: Analyzing trace with hash -221055880, now seen corresponding path program 1 times [2020-10-20 01:09:47,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:09:47,902 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131291950] [2020-10-20 01:09:47,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:09:47,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:09:48,067 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 01:09:48,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131291950] [2020-10-20 01:09:48,068 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 01:09:48,068 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-20 01:09:48,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437952460] [2020-10-20 01:09:48,070 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-20 01:09:48,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:09:48,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-20 01:09:48,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-20 01:09:48,071 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 6 states. [2020-10-20 01:09:48,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:09:48,146 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2020-10-20 01:09:48,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-20 01:09:48,147 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-10-20 01:09:48,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:09:48,148 INFO L225 Difference]: With dead ends: 23 [2020-10-20 01:09:48,148 INFO L226 Difference]: Without dead ends: 21 [2020-10-20 01:09:48,149 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 01:09:48,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-20 01:09:48,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-10-20 01:09:48,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-20 01:09:48,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-10-20 01:09:48,154 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 16 [2020-10-20 01:09:48,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:09:48,154 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-10-20 01:09:48,154 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-20 01:09:48,155 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-10-20 01:09:48,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-20 01:09:48,156 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:09:48,156 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 01:09:48,156 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-20 01:09:48,156 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:09:48,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:09:48,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1285045979, now seen corresponding path program 1 times [2020-10-20 01:09:48,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:09:48,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897755269] [2020-10-20 01:09:48,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:09:48,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:09:48,360 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 01:09:48,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897755269] [2020-10-20 01:09:48,361 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 01:09:48,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-20 01:09:48,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080805796] [2020-10-20 01:09:48,362 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-20 01:09:48,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:09:48,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-20 01:09:48,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-20 01:09:48,365 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 7 states. [2020-10-20 01:09:48,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:09:48,600 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2020-10-20 01:09:48,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-20 01:09:48,601 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-10-20 01:09:48,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:09:48,604 INFO L225 Difference]: With dead ends: 35 [2020-10-20 01:09:48,604 INFO L226 Difference]: Without dead ends: 25 [2020-10-20 01:09:48,605 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-10-20 01:09:48,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-20 01:09:48,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2020-10-20 01:09:48,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-20 01:09:48,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-10-20 01:09:48,612 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 19 [2020-10-20 01:09:48,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:09:48,612 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-10-20 01:09:48,612 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-20 01:09:48,613 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-10-20 01:09:48,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-20 01:09:48,614 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:09:48,614 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:09:48,614 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-20 01:09:48,615 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:09:48,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:09:48,615 INFO L82 PathProgramCache]: Analyzing trace with hash 1576111284, now seen corresponding path program 1 times [2020-10-20 01:09:48,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:09:48,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678358637] [2020-10-20 01:09:48,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:09:48,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:09:48,785 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-20 01:09:48,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678358637] [2020-10-20 01:09:48,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728354887] [2020-10-20 01:09:48,786 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 01:09:48,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:09:48,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-20 01:09:48,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:09:48,967 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 01:09:48,976 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 01:09:48,983 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 01:09:48,985 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 01:09:48,990 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 01:09:48,992 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 01:09:49,004 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 01:09:49,047 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 01:09:49,057 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 01:09:49,062 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 01:09:49,065 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 01:09:49,078 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-20 01:09:49,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 01:09:49,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-20 01:09:49,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177846074] [2020-10-20 01:09:49,079 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-20 01:09:49,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:09:49,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-20 01:09:49,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-20 01:09:49,080 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 8 states. [2020-10-20 01:09:49,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:09:49,220 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2020-10-20 01:09:49,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-20 01:09:49,220 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-10-20 01:09:49,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:09:49,221 INFO L225 Difference]: With dead ends: 26 [2020-10-20 01:09:49,221 INFO L226 Difference]: Without dead ends: 0 [2020-10-20 01:09:49,222 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2020-10-20 01:09:49,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-20 01:09:49,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-20 01:09:49,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-20 01:09:49,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-20 01:09:49,223 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 22 [2020-10-20 01:09:49,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:09:49,223 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-20 01:09:49,223 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-20 01:09:49,223 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-20 01:09:49,223 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-20 01:09:49,431 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:09:49,435 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-20 01:09:49,534 INFO L274 CegarLoopResult]: For program point L31(lines 31 32) no Hoare annotation was computed. [2020-10-20 01:09:49,534 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 11) no Hoare annotation was computed. [2020-10-20 01:09:49,534 INFO L277 CegarLoopResult]: At program point L48(lines 35 49) the Hoare annotation is: true [2020-10-20 01:09:49,535 INFO L274 CegarLoopResult]: For program point L11(line 11) no Hoare annotation was computed. [2020-10-20 01:09:49,535 INFO L274 CegarLoopResult]: For program point L11-1(line 11) no Hoare annotation was computed. [2020-10-20 01:09:49,535 INFO L274 CegarLoopResult]: For program point L11-2(line 11) no Hoare annotation was computed. [2020-10-20 01:09:49,535 INFO L274 CegarLoopResult]: For program point L11-3(line 11) no Hoare annotation was computed. [2020-10-20 01:09:49,535 INFO L274 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-10-20 01:09:49,535 INFO L274 CegarLoopResult]: For program point L-1-1(line -1) no Hoare annotation was computed. [2020-10-20 01:09:49,535 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-10-20 01:09:49,535 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-20 01:09:49,536 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 11) no Hoare annotation was computed. [2020-10-20 01:09:49,536 INFO L274 CegarLoopResult]: For program point L24(lines 24 33) no Hoare annotation was computed. [2020-10-20 01:09:49,536 INFO L274 CegarLoopResult]: For program point L12(lines 12 14) no Hoare annotation was computed. [2020-10-20 01:09:49,536 INFO L274 CegarLoopResult]: For program point L12-1(lines 12 14) no Hoare annotation was computed. [2020-10-20 01:09:49,536 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-20 01:09:49,537 INFO L270 CegarLoopResult]: At program point L21(lines 16 22) the Hoare annotation is: (let ((.cse0 ((as const (Array Int Int)) 0))) (and (= ULTIMATE.start_main_~n~0 ULTIMATE.start_lcp_~n) (or (<= ULTIMATE.start_main_~n~0 (+ ULTIMATE.start_main_~y~0 |ULTIMATE.start_lcp_#res|)) (<= ULTIMATE.start_main_~n~0 (+ ULTIMATE.start_main_~x~0 |ULTIMATE.start_lcp_#res|))) (= (select |#memory_int| ULTIMATE.start_lcp_~a.base) .cse0) (or (<= ULTIMATE.start_main_~n~0 (+ ULTIMATE.start_lcp_~l~0 ULTIMATE.start_main_~x~0)) (<= ULTIMATE.start_main_~n~0 (+ ULTIMATE.start_lcp_~l~0 ULTIMATE.start_main_~y~0))) (<= ULTIMATE.start_lcp_~x ULTIMATE.start_main_~x~0) (= (select |#memory_int| |ULTIMATE.start_main_#t~malloc18.base|) .cse0) (= (select |#memory_int| ULTIMATE.start_main_~a~0.base) .cse0) (= ULTIMATE.start_main_~y~0 ULTIMATE.start_lcp_~y))) [2020-10-20 01:09:49,537 INFO L274 CegarLoopResult]: For program point L13(line 13) no Hoare annotation was computed. [2020-10-20 01:09:49,537 INFO L274 CegarLoopResult]: For program point L13-2(line 13) no Hoare annotation was computed. [2020-10-20 01:09:49,537 INFO L274 CegarLoopResult]: For program point L5(lines 5 7) no Hoare annotation was computed. [2020-10-20 01:09:49,537 INFO L274 CegarLoopResult]: For program point L5-1(lines 5 7) no Hoare annotation was computed. [2020-10-20 01:09:49,537 INFO L274 CegarLoopResult]: For program point L5-2(lines 5 7) no Hoare annotation was computed. [2020-10-20 01:09:49,538 INFO L274 CegarLoopResult]: For program point L18-1(line 18) no Hoare annotation was computed. [2020-10-20 01:09:49,538 INFO L274 CegarLoopResult]: For program point L18-3(lines 18 20) no Hoare annotation was computed. [2020-10-20 01:09:49,538 INFO L270 CegarLoopResult]: At program point L18-5(lines 18 20) the Hoare annotation is: (let ((.cse0 ((as const (Array Int Int)) 0))) (and (= ULTIMATE.start_main_~n~0 ULTIMATE.start_lcp_~n) (= (select |#memory_int| ULTIMATE.start_lcp_~a.base) .cse0) (<= ULTIMATE.start_lcp_~x ULTIMATE.start_main_~x~0) (= (select |#memory_int| |ULTIMATE.start_main_#t~malloc18.base|) .cse0) (= (select |#memory_int| ULTIMATE.start_main_~a~0.base) .cse0) (= ULTIMATE.start_main_~y~0 ULTIMATE.start_lcp_~y))) [2020-10-20 01:09:49,538 INFO L274 CegarLoopResult]: For program point L18-6(lines 18 20) no Hoare annotation was computed. [2020-10-20 01:09:49,538 INFO L274 CegarLoopResult]: For program point L6(line 6) no Hoare annotation was computed. [2020-10-20 01:09:49,538 INFO L274 CegarLoopResult]: For program point L6-2(line 6) no Hoare annotation was computed. [2020-10-20 01:09:49,539 INFO L274 CegarLoopResult]: For program point L6-4(line 6) no Hoare annotation was computed. [2020-10-20 01:09:49,548 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalArgumentException: unknown symbol (const Int (Array Int Int)) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:238) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:129) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:165) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:129) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:165) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:129) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.RCFGBacktranslator.translateExpression(RCFGBacktranslator.java:394) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.RCFGBacktranslator.translateExpression(RCFGBacktranslator.java:1) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateExpression(ModelTranslationContainer.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateExpressionToString(ModelTranslationContainer.java:89) at de.uni_freiburg.informatik.ultimate.core.lib.results.InvariantResult.getLongDescription(InvariantResult.java:65) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ResultService.reportResult(ResultService.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.reportResult(TraceAbstractionStarter.java:707) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.createInvariantResults(TraceAbstractionStarter.java:267) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:224) 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 01:09:49,552 INFO L168 Benchmark]: Toolchain (without parser) took 3306.53 ms. Allocated memory was 35.1 MB in the beginning and 55.6 MB in the end (delta: 20.4 MB). Free memory was 7.8 MB in the beginning and 15.7 MB in the end (delta: -7.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 14.3 GB. [2020-10-20 01:09:49,553 INFO L168 Benchmark]: CDTParser took 0.44 ms. Allocated memory is still 34.6 MB. Free memory was 13.3 MB in the beginning and 13.2 MB in the end (delta: 52.3 kB). Peak memory consumption was 52.3 kB. Max. memory is 14.3 GB. [2020-10-20 01:09:49,554 INFO L168 Benchmark]: CACSL2BoogieTranslator took 408.87 ms. Allocated memory was 35.1 MB in the beginning and 44.6 MB in the end (delta: 9.4 MB). Free memory was 7.0 MB in the beginning and 25.8 MB in the end (delta: -18.8 MB). Peak memory consumption was 6.1 MB. Max. memory is 14.3 GB. [2020-10-20 01:09:49,559 INFO L168 Benchmark]: Boogie Procedure Inliner took 48.04 ms. Allocated memory is still 44.6 MB. Free memory was 25.8 MB in the beginning and 23.6 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.2 MB. Max. memory is 14.3 GB. [2020-10-20 01:09:49,559 INFO L168 Benchmark]: Boogie Preprocessor took 30.11 ms. Allocated memory is still 44.6 MB. Free memory was 23.6 MB in the beginning and 22.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 14.3 GB. [2020-10-20 01:09:49,560 INFO L168 Benchmark]: RCFGBuilder took 425.42 ms. Allocated memory was 44.6 MB in the beginning and 46.1 MB in the end (delta: 1.6 MB). Free memory was 22.0 MB in the beginning and 15.6 MB in the end (delta: 6.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 14.3 GB. [2020-10-20 01:09:49,562 INFO L168 Benchmark]: TraceAbstraction took 2381.25 ms. Allocated memory was 46.1 MB in the beginning and 55.6 MB in the end (delta: 9.4 MB). Free memory was 15.2 MB in the beginning and 15.7 MB in the end (delta: -482.3 kB). Peak memory consumption was 9.0 MB. Max. memory is 14.3 GB. [2020-10-20 01:09:49,566 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.44 ms. Allocated memory is still 34.6 MB. Free memory was 13.3 MB in the beginning and 13.2 MB in the end (delta: 52.3 kB). Peak memory consumption was 52.3 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 408.87 ms. Allocated memory was 35.1 MB in the beginning and 44.6 MB in the end (delta: 9.4 MB). Free memory was 7.0 MB in the beginning and 25.8 MB in the end (delta: -18.8 MB). Peak memory consumption was 6.1 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 48.04 ms. Allocated memory is still 44.6 MB. Free memory was 25.8 MB in the beginning and 23.6 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.2 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 30.11 ms. Allocated memory is still 44.6 MB. Free memory was 23.6 MB in the beginning and 22.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 14.3 GB. * RCFGBuilder took 425.42 ms. Allocated memory was 44.6 MB in the beginning and 46.1 MB in the end (delta: 1.6 MB). Free memory was 22.0 MB in the beginning and 15.6 MB in the end (delta: 6.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 14.3 GB. * TraceAbstraction took 2381.25 ms. Allocated memory was 46.1 MB in the beginning and 55.6 MB in the end (delta: 9.4 MB). Free memory was 15.2 MB in the beginning and 15.7 MB in the end (delta: -482.3 kB). Peak memory consumption was 9.0 MB. Max. memory is 14.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 11]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 11]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold - ExceptionOrErrorResult: IllegalArgumentException: unknown symbol (const Int (Array Int Int)) de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalArgumentException: unknown symbol (const Int (Array Int Int)): de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:238) 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 01:09:51,859 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 01:09:51,862 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 01:09:51,886 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 01:09:51,887 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 01:09:51,888 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 01:09:51,889 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 01:09:51,891 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 01:09:51,893 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 01:09:51,896 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 01:09:51,897 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 01:09:51,901 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 01:09:51,902 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 01:09:51,904 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 01:09:51,906 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 01:09:51,907 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 01:09:51,910 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 01:09:51,914 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 01:09:51,916 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 01:09:51,921 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 01:09:51,924 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 01:09:51,926 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 01:09:51,930 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 01:09:51,932 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 01:09:51,934 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 01:09:51,937 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 01:09:51,938 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 01:09:51,939 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 01:09:51,940 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 01:09:51,942 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 01:09:51,942 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 01:09:51,943 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 01:09:51,943 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 01:09:51,945 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 01:09:51,946 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 01:09:51,946 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 01:09:51,947 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 01:09:51,947 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 01:09:51,948 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 01:09:51,957 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 01:09:51,958 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 01:09:51,959 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2020-10-20 01:09:52,003 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 01:09:52,004 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 01:09:52,005 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 01:09:52,006 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 01:09:52,006 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 01:09:52,006 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 01:09:52,007 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-20 01:09:52,007 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-20 01:09:52,007 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 01:09:52,007 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-20 01:09:52,008 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-20 01:09:52,009 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-20 01:09:52,009 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-10-20 01:09:52,009 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-10-20 01:09:52,010 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-20 01:09:52,010 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-20 01:09:52,010 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 01:09:52,010 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-20 01:09:52,011 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 01:09:52,011 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 01:09:52,011 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-20 01:09:52,011 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-20 01:09:52,012 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 01:09:52,012 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 01:09:52,012 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-20 01:09:52,012 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-20 01:09:52,013 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2020-10-20 01:09:52,013 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-10-20 01:09:52,013 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-20 01:09:52,013 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 01:09:52,014 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-20 01:09:52,014 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 -> 99469a4d9e5d9407366653a2d47248a07b3d0735 [2020-10-20 01:09:52,251 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 01:09:52,264 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 01:09:52,268 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 01:09:52,270 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 01:09:52,270 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 01:09:52,271 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/verifythis/lcp.c [2020-10-20 01:09:52,356 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8bc249cfb/cae4167c58ae43c1a5202f00cdeefe5d/FLAG0017814de [2020-10-20 01:09:52,953 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 01:09:52,954 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/lcp.c [2020-10-20 01:09:52,967 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8bc249cfb/cae4167c58ae43c1a5202f00cdeefe5d/FLAG0017814de [2020-10-20 01:09:53,375 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8bc249cfb/cae4167c58ae43c1a5202f00cdeefe5d [2020-10-20 01:09:53,378 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 01:09:53,385 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-20 01:09:53,386 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 01:09:53,387 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 01:09:53,390 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 01:09:53,391 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 01:09:53" (1/1) ... [2020-10-20 01:09:53,395 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@544a59f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:09:53, skipping insertion in model container [2020-10-20 01:09:53,395 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 01:09:53" (1/1) ... [2020-10-20 01:09:53,403 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 01:09:53,425 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 01:09:53,630 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 01:09:53,662 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 01:09:53,724 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 01:09:53,747 INFO L208 MainTranslator]: Completed translation [2020-10-20 01:09:53,747 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:09:53 WrapperNode [2020-10-20 01:09:53,748 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 01:09:53,749 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-20 01:09:53,749 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-20 01:09:53,749 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-20 01:09:53,759 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:09:53" (1/1) ... [2020-10-20 01:09:53,773 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:09:53" (1/1) ... [2020-10-20 01:09:53,804 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-20 01:09:53,805 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 01:09:53,805 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 01:09:53,805 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 01:09:53,823 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:09:53" (1/1) ... [2020-10-20 01:09:53,823 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:09:53" (1/1) ... [2020-10-20 01:09:53,831 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:09:53" (1/1) ... [2020-10-20 01:09:53,831 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:09:53" (1/1) ... [2020-10-20 01:09:53,841 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:09:53" (1/1) ... [2020-10-20 01:09:53,846 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:09:53" (1/1) ... [2020-10-20 01:09:53,851 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:09:53" (1/1) ... [2020-10-20 01:09:53,861 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 01:09:53,862 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 01:09:53,862 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 01:09:53,862 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 01:09:53,863 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:09:53" (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 01:09:53,930 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-10-20 01:09:53,931 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-20 01:09:53,931 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-20 01:09:53,931 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2020-10-20 01:09:53,932 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 01:09:53,932 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 01:09:53,932 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-20 01:09:54,417 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 01:09:54,417 INFO L298 CfgBuilder]: Removed 25 assume(true) statements. [2020-10-20 01:09:54,419 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 01:09:54 BoogieIcfgContainer [2020-10-20 01:09:54,419 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 01:09:54,421 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-20 01:09:54,422 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-20 01:09:54,426 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-20 01:09:54,426 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 01:09:53" (1/3) ... [2020-10-20 01:09:54,429 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ef4040 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 01:09:54, skipping insertion in model container [2020-10-20 01:09:54,429 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:09:53" (2/3) ... [2020-10-20 01:09:54,430 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ef4040 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 01:09:54, skipping insertion in model container [2020-10-20 01:09:54,430 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 01:09:54" (3/3) ... [2020-10-20 01:09:54,432 INFO L111 eAbstractionObserver]: Analyzing ICFG lcp.c [2020-10-20 01:09:54,443 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-20 01:09:54,452 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-10-20 01:09:54,463 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-20 01:09:54,487 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-20 01:09:54,487 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-20 01:09:54,487 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-20 01:09:54,487 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 01:09:54,487 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 01:09:54,488 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-20 01:09:54,488 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 01:09:54,488 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-20 01:09:54,504 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-10-20 01:09:54,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-20 01:09:54,510 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:09:54,511 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:09:54,512 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:09:54,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:09:54,517 INFO L82 PathProgramCache]: Analyzing trace with hash 1579702917, now seen corresponding path program 1 times [2020-10-20 01:09:54,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-20 01:09:54,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1264595516] [2020-10-20 01:09:54,532 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 01:09:54,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:09:54,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 1 conjunts are in the unsatisfiable core [2020-10-20 01:09:54,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:09:54,714 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 01:09:54,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-20 01:09:54,720 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 01:09:54,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1264595516] [2020-10-20 01:09:54,722 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-20 01:09:54,723 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-10-20 01:09:54,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072163782] [2020-10-20 01:09:54,728 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-20 01:09:54,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-20 01:09:54,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-20 01:09:54,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-20 01:09:54,741 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 2 states. [2020-10-20 01:09:54,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:09:54,759 INFO L93 Difference]: Finished difference Result 53 states and 68 transitions. [2020-10-20 01:09:54,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-20 01:09:54,760 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 14 [2020-10-20 01:09:54,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:09:54,771 INFO L225 Difference]: With dead ends: 53 [2020-10-20 01:09:54,771 INFO L226 Difference]: Without dead ends: 22 [2020-10-20 01:09:54,775 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 26 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 01:09:54,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-20 01:09:54,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-10-20 01:09:54,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-20 01:09:54,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-10-20 01:09:54,807 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 14 [2020-10-20 01:09:54,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:09:54,808 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-10-20 01:09:54,808 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-20 01:09:54,808 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-10-20 01:09:54,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-20 01:09:54,809 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:09:54,809 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:09:55,010 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-10-20 01:09:55,010 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:09:55,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:09:55,011 INFO L82 PathProgramCache]: Analyzing trace with hash 588290746, now seen corresponding path program 1 times [2020-10-20 01:09:55,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-20 01:09:55,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1069604366] [2020-10-20 01:09:55,014 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 01:09:55,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:09:55,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-20 01:09:55,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:09:55,229 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 01:09:55,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-20 01:09:55,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1069604366] [2020-10-20 01:09:55,258 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: no int: (_ BitVec 32) [2020-10-20 01:09:55,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [79611209] [2020-10-20 01:09:55,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-20 01:09:55,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:09:55,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-20 01:09:55,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:09:55,545 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2020-10-20 01:09:55,546 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-20 01:09:55,551 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 01:09:55,551 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-20 01:09:55,551 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:7, output treesize:6 [2020-10-20 01:09:55,616 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 01:09:55,643 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 01:09:55,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-20 01:10:08,061 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 01:10:08,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-20 01:10:08,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 9 [2020-10-20 01:10:08,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181228705] [2020-10-20 01:10:08,068 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-20 01:10:08,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-20 01:10:08,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-20 01:10:08,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=102, Unknown=6, NotChecked=0, Total=132 [2020-10-20 01:10:08,073 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 9 states. [2020-10-20 01:10:10,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:10:10,399 INFO L93 Difference]: Finished difference Result 35 states and 36 transitions. [2020-10-20 01:10:10,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-20 01:10:10,403 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2020-10-20 01:10:10,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:10:10,404 INFO L225 Difference]: With dead ends: 35 [2020-10-20 01:10:10,404 INFO L226 Difference]: Without dead ends: 23 [2020-10-20 01:10:10,407 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 14.6s TimeCoverageRelationStatistics Valid=50, Invalid=153, Unknown=7, NotChecked=0, Total=210 [2020-10-20 01:10:10,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-20 01:10:10,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-20 01:10:10,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-20 01:10:10,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2020-10-20 01:10:10,420 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 16 [2020-10-20 01:10:10,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:10:10,421 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2020-10-20 01:10:10,422 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-20 01:10:10,422 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-10-20 01:10:10,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-20 01:10:10,423 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:10:10,423 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:10:10,828 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 cvc4 --incremental --print-success --lang smt --rewrite-divk,3 mathsat -unsat_core_generation=3 [2020-10-20 01:10:10,829 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:10:10,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:10:10,830 INFO L82 PathProgramCache]: Analyzing trace with hash -221055880, now seen corresponding path program 1 times [2020-10-20 01:10:10,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-20 01:10:10,831 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2036319868] [2020-10-20 01:10:10,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 5 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with mathsat -unsat_core_generation=3 [2020-10-20 01:10:10,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:10:10,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-20 01:10:10,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:10:11,001 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 01:10:11,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-20 01:10:11,028 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-20 01:10:11,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 01:10:11,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2036319868] [2020-10-20 01:10:11,108 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-20 01:10:11,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2020-10-20 01:10:11,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904624265] [2020-10-20 01:10:11,109 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-20 01:10:11,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-20 01:10:11,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-20 01:10:11,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-20 01:10:11,110 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 7 states. [2020-10-20 01:10:11,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:10:11,237 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2020-10-20 01:10:11,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-20 01:10:11,237 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2020-10-20 01:10:11,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:10:11,240 INFO L225 Difference]: With dead ends: 39 [2020-10-20 01:10:11,240 INFO L226 Difference]: Without dead ends: 27 [2020-10-20 01:10:11,241 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-20 01:10:11,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-20 01:10:11,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2020-10-20 01:10:11,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-20 01:10:11,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-10-20 01:10:11,247 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 16 [2020-10-20 01:10:11,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:10:11,248 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-10-20 01:10:11,248 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-20 01:10:11,248 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-10-20 01:10:11,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-20 01:10:11,249 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:10:11,249 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:10:11,469 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2020-10-20 01:10:11,470 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:10:11,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:10:11,471 INFO L82 PathProgramCache]: Analyzing trace with hash 598502217, now seen corresponding path program 1 times [2020-10-20 01:10:11,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-20 01:10:11,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2088800107] [2020-10-20 01:10:11,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 6 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with mathsat -unsat_core_generation=3 [2020-10-20 01:10:11,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:10:11,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 36 conjunts are in the unsatisfiable core [2020-10-20 01:10:11,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:10:11,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2088800107] [2020-10-20 01:10:11,933 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: no int: (_ BitVec 32) [2020-10-20 01:10:11,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1171156236] [2020-10-20 01:10:11,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-20 01:10:12,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:10:12,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-20 01:10:12,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:10:12,116 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2020-10-20 01:10:12,116 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-20 01:10:12,125 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 01:10:12,126 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-20 01:10:12,126 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:7, output treesize:6 [2020-10-20 01:10:12,220 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 01:10:12,255 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-20 01:10:12,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-20 01:10:25,053 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-20 01:10:25,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-20 01:10:25,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2020-10-20 01:10:25,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824312591] [2020-10-20 01:10:25,055 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-20 01:10:25,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-20 01:10:25,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-20 01:10:25,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=228, Unknown=5, NotChecked=0, Total=272 [2020-10-20 01:10:25,059 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 10 states. [2020-10-20 01:10:27,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:10:27,297 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2020-10-20 01:10:27,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-20 01:10:27,298 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 19 [2020-10-20 01:10:27,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:10:27,299 INFO L225 Difference]: With dead ends: 25 [2020-10-20 01:10:27,299 INFO L226 Difference]: Without dead ends: 23 [2020-10-20 01:10:27,300 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 15.2s TimeCoverageRelationStatistics Valid=66, Invalid=308, Unknown=6, NotChecked=0, Total=380 [2020-10-20 01:10:27,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-20 01:10:27,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-20 01:10:27,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-20 01:10:27,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-10-20 01:10:27,305 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 19 [2020-10-20 01:10:27,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:10:27,305 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-10-20 01:10:27,306 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-20 01:10:27,306 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-10-20 01:10:27,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-20 01:10:27,306 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:10:27,307 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:10:27,708 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 cvc4 --incremental --print-success --lang smt --rewrite-divk,6 mathsat -unsat_core_generation=3 [2020-10-20 01:10:27,709 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:10:27,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:10:27,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1576111284, now seen corresponding path program 1 times [2020-10-20 01:10:27,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-20 01:10:27,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [413519644] [2020-10-20 01:10:27,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 8 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with mathsat -unsat_core_generation=3 [2020-10-20 01:10:27,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:10:27,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-20 01:10:27,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:10:27,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [413519644] [2020-10-20 01:10:27,896 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: no int: (_ BitVec 32) [2020-10-20 01:10:27,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1434119521] [2020-10-20 01:10:27,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 9 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-20 01:10:28,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:10:28,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-20 01:10:28,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:10:28,178 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: no int: (_ BitVec 32) [2020-10-20 01:10:28,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254511268] [2020-10-20 01:10:28,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:10:28,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:10:28,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 33 conjunts are in the unsatisfiable core [2020-10-20 01:10:28,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:10:28,472 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: no int: (_ BitVec 32) [2020-10-20 01:10:28,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2020-10-20 01:10:28,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2020-10-20 01:10:28,473 ERROR L205 FreeRefinementEngine]: Strategy WOLF failed to provide any proof altough trace is infeasible [2020-10-20 01:10:28,473 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-20 01:10:29,080 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 cvc4 --incremental --print-success --lang smt --rewrite-divk,8 mathsat -unsat_core_generation=3,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:10:29,102 WARN L238 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-10-20 01:10:29,102 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 01:10:29 BoogieIcfgContainer [2020-10-20 01:10:29,102 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-20 01:10:29,103 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 01:10:29,103 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 01:10:29,103 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 01:10:29,104 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 01:09:54" (3/4) ... [2020-10-20 01:10:29,108 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-10-20 01:10:29,108 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 01:10:29,110 INFO L168 Benchmark]: Toolchain (without parser) took 35730.01 ms. Allocated memory was 43.0 MB in the beginning and 53.0 MB in the end (delta: 10.0 MB). Free memory was 23.3 MB in the beginning and 9.9 MB in the end (delta: 13.4 MB). Peak memory consumption was 23.3 MB. Max. memory is 14.3 GB. [2020-10-20 01:10:29,111 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 32.5 MB. Free memory was 11.4 MB in the beginning and 11.4 MB in the end (delta: 3.1 kB). Peak memory consumption was 3.1 kB. Max. memory is 14.3 GB. [2020-10-20 01:10:29,112 INFO L168 Benchmark]: CACSL2BoogieTranslator took 361.84 ms. Allocated memory was 43.0 MB in the beginning and 43.5 MB in the end (delta: 524.3 kB). Free memory was 22.4 MB in the beginning and 23.7 MB in the end (delta: -1.3 MB). Peak memory consumption was 13.2 MB. Max. memory is 14.3 GB. [2020-10-20 01:10:29,113 INFO L168 Benchmark]: Boogie Procedure Inliner took 55.65 ms. Allocated memory is still 43.5 MB. Free memory was 23.7 MB in the beginning and 21.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 14.3 GB. [2020-10-20 01:10:29,113 INFO L168 Benchmark]: Boogie Preprocessor took 56.68 ms. Allocated memory is still 43.5 MB. Free memory was 21.6 MB in the beginning and 19.8 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 14.3 GB. [2020-10-20 01:10:29,114 INFO L168 Benchmark]: RCFGBuilder took 557.81 ms. Allocated memory was 43.5 MB in the beginning and 46.1 MB in the end (delta: 2.6 MB). Free memory was 19.8 MB in the beginning and 18.8 MB in the end (delta: 1.0 MB). Peak memory consumption was 10.4 MB. Max. memory is 14.3 GB. [2020-10-20 01:10:29,115 INFO L168 Benchmark]: TraceAbstraction took 34681.11 ms. Allocated memory was 46.1 MB in the beginning and 53.0 MB in the end (delta: 6.8 MB). Free memory was 18.3 MB in the beginning and 10.4 MB in the end (delta: 7.9 MB). Peak memory consumption was 14.7 MB. Max. memory is 14.3 GB. [2020-10-20 01:10:29,116 INFO L168 Benchmark]: Witness Printer took 5.31 ms. Allocated memory is still 53.0 MB. Free memory was 10.4 MB in the beginning and 9.9 MB in the end (delta: 531.7 kB). Peak memory consumption was 531.7 kB. Max. memory is 14.3 GB. [2020-10-20 01:10:29,121 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 32.5 MB. Free memory was 11.4 MB in the beginning and 11.4 MB in the end (delta: 3.1 kB). Peak memory consumption was 3.1 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 361.84 ms. Allocated memory was 43.0 MB in the beginning and 43.5 MB in the end (delta: 524.3 kB). Free memory was 22.4 MB in the beginning and 23.7 MB in the end (delta: -1.3 MB). Peak memory consumption was 13.2 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 55.65 ms. Allocated memory is still 43.5 MB. Free memory was 23.7 MB in the beginning and 21.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 56.68 ms. Allocated memory is still 43.5 MB. Free memory was 21.6 MB in the beginning and 19.8 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 14.3 GB. * RCFGBuilder took 557.81 ms. Allocated memory was 43.5 MB in the beginning and 46.1 MB in the end (delta: 2.6 MB). Free memory was 19.8 MB in the beginning and 18.8 MB in the end (delta: 1.0 MB). Peak memory consumption was 10.4 MB. Max. memory is 14.3 GB. * TraceAbstraction took 34681.11 ms. Allocated memory was 46.1 MB in the beginning and 53.0 MB in the end (delta: 6.8 MB). Free memory was 18.3 MB in the beginning and 10.4 MB in the end (delta: 7.9 MB). Peak memory consumption was 14.7 MB. Max. memory is 14.3 GB. * Witness Printer took 5.31 ms. Allocated memory is still 53.0 MB. Free memory was 10.4 MB in the beginning and 9.9 MB in the end (delta: 531.7 kB). Peak memory consumption was 531.7 kB. Max. memory is 14.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 11]: 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: [L36] int n = __VERIFIER_nondet_int(); [L6] COND FALSE !(!cond) [L39] int *a = calloc(n, sizeof(int)); [L41] int x = __VERIFIER_nondet_int(); [L42] int y = __VERIFIER_nondet_int(); [L6] COND FALSE !(!cond) [L17] int l = 0; [L18] x+l