./Ultimate.py --spec ../sv-benchmarks/c/properties/no-overflow.prp --file ../sv-benchmarks/c/termination-numeric/TerminatorRec02.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 906a4fb5 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -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/termination-numeric/TerminatorRec02.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-64bit-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 ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 8c9656c5ef8dceb7982043d8db455c38d2f23147 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis No suitable file found in config dir /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config using search string *Overflow*64bit*_Bitvector*.epf No suitable settings file found using Overflow*64bit*_Bitvector ERROR: UNSUPPORTED PROPERTY Writing output log to file Ultimate.log Result: UNKNOWN --- Real Ultimate output --- This is Ultimate 0.1.25-906a4fb [2020-10-19 18:33:09,036 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-19 18:33:09,038 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-19 18:33:09,062 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-19 18:33:09,062 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-19 18:33:09,063 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-19 18:33:09,065 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-19 18:33:09,066 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-19 18:33:09,068 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-19 18:33:09,069 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-19 18:33:09,070 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-19 18:33:09,071 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-19 18:33:09,071 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-19 18:33:09,072 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-19 18:33:09,073 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-19 18:33:09,074 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-19 18:33:09,075 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-19 18:33:09,076 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-19 18:33:09,078 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-19 18:33:09,080 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-19 18:33:09,082 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-19 18:33:09,083 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-19 18:33:09,084 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-19 18:33:09,085 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-19 18:33:09,088 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-19 18:33:09,088 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-19 18:33:09,088 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-19 18:33:09,089 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-19 18:33:09,090 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-19 18:33:09,091 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-19 18:33:09,091 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-19 18:33:09,092 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-19 18:33:09,092 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-19 18:33:09,093 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-19 18:33:09,094 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-19 18:33:09,094 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-19 18:33:09,095 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-19 18:33:09,095 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-19 18:33:09,096 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-19 18:33:09,097 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-19 18:33:09,097 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-19 18:33:09,098 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-64bit-Automizer_Default.epf [2020-10-19 18:33:09,122 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-19 18:33:09,123 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-19 18:33:09,124 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-19 18:33:09,124 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-19 18:33:09,124 INFO L138 SettingsManager]: * Use SBE=true [2020-10-19 18:33:09,125 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-19 18:33:09,125 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-10-19 18:33:09,125 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-19 18:33:09,125 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-19 18:33:09,125 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-19 18:33:09,126 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-19 18:33:09,126 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-19 18:33:09,126 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2020-10-19 18:33:09,126 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-19 18:33:09,126 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-19 18:33:09,127 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-19 18:33:09,127 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-19 18:33:09,127 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-19 18:33:09,127 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-19 18:33:09,128 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-19 18:33:09,128 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-19 18:33:09,128 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-19 18:33:09,128 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-19 18:33:09,128 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-19 18:33:09,129 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-19 18:33:09,129 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-19 18:33:09,129 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-19 18:33:09,129 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-19 18:33:09,129 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 ! overflow) ) 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 -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8c9656c5ef8dceb7982043d8db455c38d2f23147 [2020-10-19 18:33:09,421 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-19 18:33:09,433 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-19 18:33:09,436 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-19 18:33:09,437 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-19 18:33:09,438 INFO L275 PluginConnector]: CDTParser initialized [2020-10-19 18:33:09,439 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-numeric/TerminatorRec02.c [2020-10-19 18:33:09,497 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6dbf779d0/b0af096a04394a438a17ab701a51dc86/FLAGdfea6b0d6 [2020-10-19 18:33:09,904 INFO L306 CDTParser]: Found 1 translation units. [2020-10-19 18:33:09,905 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-numeric/TerminatorRec02.c [2020-10-19 18:33:09,911 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6dbf779d0/b0af096a04394a438a17ab701a51dc86/FLAGdfea6b0d6 [2020-10-19 18:33:10,319 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6dbf779d0/b0af096a04394a438a17ab701a51dc86 [2020-10-19 18:33:10,323 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-19 18:33:10,330 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-19 18:33:10,331 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-19 18:33:10,332 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-19 18:33:10,336 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-19 18:33:10,337 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 06:33:10" (1/1) ... [2020-10-19 18:33:10,341 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a7bdc41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:33:10, skipping insertion in model container [2020-10-19 18:33:10,341 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 06:33:10" (1/1) ... [2020-10-19 18:33:10,349 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-19 18:33:10,368 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-19 18:33:10,513 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 18:33:10,517 INFO L203 MainTranslator]: Completed pre-run [2020-10-19 18:33:10,532 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 18:33:10,543 INFO L208 MainTranslator]: Completed translation [2020-10-19 18:33:10,543 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:33:10 WrapperNode [2020-10-19 18:33:10,543 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-19 18:33:10,544 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-19 18:33:10,544 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-19 18:33:10,544 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-19 18:33:10,552 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:33:10" (1/1) ... [2020-10-19 18:33:10,556 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:33:10" (1/1) ... [2020-10-19 18:33:10,629 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-19 18:33:10,629 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-19 18:33:10,629 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-19 18:33:10,630 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-19 18:33:10,638 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:33:10" (1/1) ... [2020-10-19 18:33:10,639 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:33:10" (1/1) ... [2020-10-19 18:33:10,640 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:33:10" (1/1) ... [2020-10-19 18:33:10,640 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:33:10" (1/1) ... [2020-10-19 18:33:10,642 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:33:10" (1/1) ... [2020-10-19 18:33:10,644 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:33:10" (1/1) ... [2020-10-19 18:33:10,645 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:33:10" (1/1) ... [2020-10-19 18:33:10,646 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-19 18:33:10,647 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-19 18:33:10,647 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-19 18:33:10,647 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-19 18:33:10,648 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:33:10" (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 [2020-10-19 18:33:10,710 INFO L130 BoogieDeclarations]: Found specification of procedure fact [2020-10-19 18:33:10,710 INFO L138 BoogieDeclarations]: Found implementation of procedure fact [2020-10-19 18:33:10,710 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-19 18:33:10,711 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-19 18:33:12,941 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-19 18:33:12,942 INFO L298 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-19 18:33:12,944 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 06:33:12 BoogieIcfgContainer [2020-10-19 18:33:12,945 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-19 18:33:12,947 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-19 18:33:12,947 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-19 18:33:12,967 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-19 18:33:12,967 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.10 06:33:10" (1/3) ... [2020-10-19 18:33:12,968 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2abc35dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 06:33:12, skipping insertion in model container [2020-10-19 18:33:12,969 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:33:10" (2/3) ... [2020-10-19 18:33:12,972 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2abc35dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 06:33:12, skipping insertion in model container [2020-10-19 18:33:12,973 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 06:33:12" (3/3) ... [2020-10-19 18:33:12,978 INFO L111 eAbstractionObserver]: Analyzing ICFG TerminatorRec02.c [2020-10-19 18:33:13,000 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-19 18:33:13,007 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2020-10-19 18:33:13,047 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-10-19 18:33:13,070 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-19 18:33:13,070 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-19 18:33:13,070 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-19 18:33:13,070 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-19 18:33:13,071 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-19 18:33:13,071 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-19 18:33:13,071 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-19 18:33:13,071 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-19 18:33:13,087 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-10-19 18:33:13,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-10-19 18:33:13,092 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:33:13,093 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:33:13,094 INFO L429 AbstractCegarLoop]: === Iteration 1 === [factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-10-19 18:33:13,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:33:13,098 INFO L82 PathProgramCache]: Analyzing trace with hash 306322899, now seen corresponding path program 1 times [2020-10-19 18:33:13,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:33:13,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100262262] [2020-10-19 18:33:13,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:33:13,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:33:13,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:33:13,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100262262] [2020-10-19 18:33:13,294 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:33:13,294 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 18:33:13,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901006506] [2020-10-19 18:33:13,300 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-19 18:33:13,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:33:13,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-19 18:33:13,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-19 18:33:13,317 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 5 states. [2020-10-19 18:33:15,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:33:15,470 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2020-10-19 18:33:15,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-19 18:33:15,472 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2020-10-19 18:33:15,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:33:15,479 INFO L225 Difference]: With dead ends: 22 [2020-10-19 18:33:15,480 INFO L226 Difference]: Without dead ends: 17 [2020-10-19 18:33:15,482 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-19 18:33:15,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-10-19 18:33:15,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-10-19 18:33:15,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-19 18:33:15,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2020-10-19 18:33:15,516 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 7 [2020-10-19 18:33:15,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:33:15,517 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2020-10-19 18:33:15,517 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-19 18:33:15,517 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2020-10-19 18:33:15,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-19 18:33:15,517 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:33:15,518 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:33:15,518 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-19 18:33:15,518 INFO L429 AbstractCegarLoop]: === Iteration 2 === [factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-10-19 18:33:15,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:33:15,519 INFO L82 PathProgramCache]: Analyzing trace with hash 906075314, now seen corresponding path program 1 times [2020-10-19 18:33:15,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:33:15,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141153082] [2020-10-19 18:33:15,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:33:15,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:33:15,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:33:15,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141153082] [2020-10-19 18:33:15,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:33:15,548 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-19 18:33:15,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740304590] [2020-10-19 18:33:15,550 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-19 18:33:15,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:33:15,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 18:33:15,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 18:33:15,551 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 3 states. [2020-10-19 18:33:15,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:33:15,580 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2020-10-19 18:33:15,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 18:33:15,581 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-10-19 18:33:15,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:33:15,583 INFO L225 Difference]: With dead ends: 19 [2020-10-19 18:33:15,583 INFO L226 Difference]: Without dead ends: 18 [2020-10-19 18:33:15,584 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 18:33:15,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-19 18:33:15,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 16. [2020-10-19 18:33:15,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-19 18:33:15,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2020-10-19 18:33:15,590 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 8 [2020-10-19 18:33:15,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:33:15,590 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2020-10-19 18:33:15,590 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-19 18:33:15,590 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2020-10-19 18:33:15,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-19 18:33:15,591 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:33:15,591 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:33:15,591 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-19 18:33:15,592 INFO L429 AbstractCegarLoop]: === Iteration 3 === [factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-10-19 18:33:15,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:33:15,592 INFO L82 PathProgramCache]: Analyzing trace with hash -484212048, now seen corresponding path program 1 times [2020-10-19 18:33:15,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:33:15,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043004427] [2020-10-19 18:33:15,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:33:15,606 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-19 18:33:15,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [434082014] [2020-10-19 18:33:15,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-19 18:33:15,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:33:15,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-19 18:33:15,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:33:15,785 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:33:15,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043004427] [2020-10-19 18:33:15,786 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-19 18:33:15,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434082014] [2020-10-19 18:33:15,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-19 18:33:15,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-19 18:33:15,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120646199] [2020-10-19 18:33:15,787 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-19 18:33:15,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:33:15,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-19 18:33:15,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-19 18:33:15,789 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 8 states. [2020-10-19 18:33:15,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:33:15,929 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-10-19 18:33:15,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-19 18:33:15,929 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2020-10-19 18:33:15,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:33:15,931 INFO L225 Difference]: With dead ends: 25 [2020-10-19 18:33:15,931 INFO L226 Difference]: Without dead ends: 24 [2020-10-19 18:33:15,932 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-10-19 18:33:15,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-19 18:33:15,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 20. [2020-10-19 18:33:15,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-19 18:33:15,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-10-19 18:33:15,939 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 15 [2020-10-19 18:33:15,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:33:15,940 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-10-19 18:33:15,940 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-19 18:33:15,940 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-10-19 18:33:15,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-19 18:33:15,941 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:33:15,941 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:33:16,154 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-10-19 18:33:16,155 INFO L429 AbstractCegarLoop]: === Iteration 4 === [factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-10-19 18:33:16,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:33:16,155 INFO L82 PathProgramCache]: Analyzing trace with hash -2125671557, now seen corresponding path program 1 times [2020-10-19 18:33:16,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:33:16,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621470171] [2020-10-19 18:33:16,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:33:16,166 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-19 18:33:16,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1648483930] [2020-10-19 18:33:16,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:33:16,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:33:16,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-19 18:33:16,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:33:16,255 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-19 18:33:16,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621470171] [2020-10-19 18:33:16,256 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-19 18:33:16,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648483930] [2020-10-19 18:33:16,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:33:16,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-19 18:33:16,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581904026] [2020-10-19 18:33:16,257 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-19 18:33:16,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:33:16,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-19 18:33:16,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-19 18:33:16,259 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 6 states. [2020-10-19 18:33:16,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:33:16,471 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2020-10-19 18:33:16,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-19 18:33:16,471 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-10-19 18:33:16,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:33:16,472 INFO L225 Difference]: With dead ends: 20 [2020-10-19 18:33:16,472 INFO L226 Difference]: Without dead ends: 19 [2020-10-19 18:33:16,473 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-10-19 18:33:16,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-19 18:33:16,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-10-19 18:33:16,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-19 18:33:16,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2020-10-19 18:33:16,477 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 16 [2020-10-19 18:33:16,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:33:16,478 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2020-10-19 18:33:16,478 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-19 18:33:16,478 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2020-10-19 18:33:16,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-19 18:33:16,479 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:33:16,479 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:33:16,680 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:33:16,681 INFO L429 AbstractCegarLoop]: === Iteration 5 === [factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-10-19 18:33:16,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:33:16,682 INFO L82 PathProgramCache]: Analyzing trace with hash 60377040, now seen corresponding path program 1 times [2020-10-19 18:33:16,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:33:16,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420689850] [2020-10-19 18:33:16,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:33:16,707 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-19 18:33:16,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1135369693] [2020-10-19 18:33:16,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:33:16,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:33:16,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-19 18:33:16,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:33:16,876 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-19 18:33:16,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420689850] [2020-10-19 18:33:16,877 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-19 18:33:16,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135369693] [2020-10-19 18:33:16,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-19 18:33:16,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-19 18:33:16,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134093940] [2020-10-19 18:33:16,879 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-19 18:33:16,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:33:16,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-19 18:33:16,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-19 18:33:16,881 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 11 states. [2020-10-19 18:33:17,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:33:17,145 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-10-19 18:33:17,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-19 18:33:17,146 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-10-19 18:33:17,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:33:17,147 INFO L225 Difference]: With dead ends: 28 [2020-10-19 18:33:17,147 INFO L226 Difference]: Without dead ends: 27 [2020-10-19 18:33:17,148 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2020-10-19 18:33:17,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-19 18:33:17,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2020-10-19 18:33:17,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-19 18:33:17,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-10-19 18:33:17,154 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 30 [2020-10-19 18:33:17,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:33:17,155 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-10-19 18:33:17,155 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-19 18:33:17,155 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-10-19 18:33:17,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-19 18:33:17,157 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:33:17,157 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2020-10-19 18:33:17,370 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:33:17,371 INFO L429 AbstractCegarLoop]: === Iteration 6 === [factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-10-19 18:33:17,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:33:17,371 INFO L82 PathProgramCache]: Analyzing trace with hash -511805776, now seen corresponding path program 2 times [2020-10-19 18:33:17,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:33:17,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051813407] [2020-10-19 18:33:17,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:33:17,385 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-19 18:33:17,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [829110613] [2020-10-19 18:33:17,385 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:33:17,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-19 18:33:17,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 18:33:17,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-19 18:33:17,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:33:17,861 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-19 18:33:17,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051813407] [2020-10-19 18:33:17,862 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-19 18:33:17,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829110613] [2020-10-19 18:33:17,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-19 18:33:17,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-19 18:33:17,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299938104] [2020-10-19 18:33:17,864 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-19 18:33:17,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:33:17,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-19 18:33:17,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2020-10-19 18:33:17,865 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 14 states. [2020-10-19 18:33:18,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:33:18,334 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2020-10-19 18:33:18,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-19 18:33:18,335 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 35 [2020-10-19 18:33:18,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:33:18,336 INFO L225 Difference]: With dead ends: 33 [2020-10-19 18:33:18,336 INFO L226 Difference]: Without dead ends: 32 [2020-10-19 18:33:18,337 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=102, Invalid=318, Unknown=0, NotChecked=0, Total=420 [2020-10-19 18:33:18,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-19 18:33:18,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2020-10-19 18:33:18,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-19 18:33:18,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2020-10-19 18:33:18,343 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 35 [2020-10-19 18:33:18,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:33:18,343 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2020-10-19 18:33:18,343 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-19 18:33:18,343 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2020-10-19 18:33:18,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-19 18:33:18,345 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:33:18,345 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2020-10-19 18:33:18,547 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:33:18,548 INFO L429 AbstractCegarLoop]: === Iteration 7 === [factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-10-19 18:33:18,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:33:18,550 INFO L82 PathProgramCache]: Analyzing trace with hash -1042885680, now seen corresponding path program 3 times [2020-10-19 18:33:18,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:33:18,550 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417008239] [2020-10-19 18:33:18,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:33:18,563 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-19 18:33:18,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2002415922] [2020-10-19 18:33:18,564 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:33:18,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-19 18:33:18,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 18:33:18,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 40 conjunts are in the unsatisfiable core [2020-10-19 18:33:18,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:33:51,642 WARN L195 Executor]: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) stderr output: (error "out of memory") [2020-10-19 18:33:51,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417008239] [2020-10-19 18:33:51,642 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-19 18:33:51,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002415922] [2020-10-19 18:33:51,643 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") [2020-10-19 18:33:51,643 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:33:51,643 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2020-10-19 18:33:51,643 ERROR L205 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2020-10-19 18:33:51,643 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-19 18:33:51,848 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-10-19 18:33:51,867 WARN L238 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-10-19 18:33:51,868 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.10 06:33:51 BoogieIcfgContainer [2020-10-19 18:33:51,868 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-19 18:33:51,869 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-19 18:33:51,869 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-19 18:33:51,869 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-19 18:33:51,870 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 06:33:12" (3/4) ... [2020-10-19 18:33:51,875 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-10-19 18:33:51,875 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-19 18:33:51,878 INFO L168 Benchmark]: Toolchain (without parser) took 41552.76 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 205.0 MB). Free memory was 960.0 MB in the beginning and 1.2 GB in the end (delta: -227.5 MB). There was no memory consumed. Max. memory is 11.5 GB. [2020-10-19 18:33:51,878 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2020-10-19 18:33:51,882 INFO L168 Benchmark]: CACSL2BoogieTranslator took 212.57 ms. Allocated memory is still 1.0 GB. Free memory was 960.0 MB in the beginning and 949.2 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2020-10-19 18:33:51,883 INFO L168 Benchmark]: Boogie Procedure Inliner took 84.99 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 144.2 MB). Free memory was 949.2 MB in the beginning and 1.1 GB in the end (delta: -191.2 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. [2020-10-19 18:33:51,885 INFO L168 Benchmark]: Boogie Preprocessor took 17.15 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.6 MB). Peak memory consumption was 6.6 MB. Max. memory is 11.5 GB. [2020-10-19 18:33:51,886 INFO L168 Benchmark]: RCFGBuilder took 2298.23 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 18.4 MB). Peak memory consumption was 18.4 MB. Max. memory is 11.5 GB. [2020-10-19 18:33:51,887 INFO L168 Benchmark]: TraceAbstraction took 38921.19 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 60.8 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -75.9 MB). Peak memory consumption was 301.0 MB. Max. memory is 11.5 GB. [2020-10-19 18:33:51,888 INFO L168 Benchmark]: Witness Printer took 6.97 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 3.9 MB). Peak memory consumption was 3.9 MB. Max. memory is 11.5 GB. [2020-10-19 18:33:51,893 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 212.57 ms. Allocated memory is still 1.0 GB. Free memory was 960.0 MB in the beginning and 949.2 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 84.99 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 144.2 MB). Free memory was 949.2 MB in the beginning and 1.1 GB in the end (delta: -191.2 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 17.15 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.6 MB). Peak memory consumption was 6.6 MB. Max. memory is 11.5 GB. * RCFGBuilder took 2298.23 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 18.4 MB). Peak memory consumption was 18.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 38921.19 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 60.8 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -75.9 MB). Peak memory consumption was 301.0 MB. Max. memory is 11.5 GB. * Witness Printer took 6.97 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 3.9 MB). Peak memory consumption was 3.9 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 20]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L26] int x = __VERIFIER_nondet_int(); [L27] COND FALSE !(x < 0) [L29] int y = __VERIFIER_nondet_int(); [L30] COND FALSE !(y < 0) [L32] int z = __VERIFIER_nondet_int(); [L33] CALL fact(x) [L18] COND TRUE x > 1 [L19] EXPR x - 1 [L19] CALL, EXPR fact(x - 1) [L18] COND TRUE x > 1 [L19] EXPR x - 1 [L19] CALL, EXPR fact(x - 1) [L18] COND TRUE x > 1 [L19] EXPR x - 1 [L19] CALL, EXPR fact(x - 1) [L18] COND TRUE x > 1 [L19] EXPR x - 1 [L19] CALL, EXPR fact(x - 1) [L18] COND TRUE x > 1 [L19] EXPR x - 1 [L19] CALL, EXPR fact(x - 1) [L18] COND FALSE !(x > 1) [L22] return 1; [L19] RET, EXPR fact(x - 1) [L19] int y = fact(x - 1); [L20] EXPR y * x [L20] return y * x; [L19] RET, EXPR fact(x - 1) [L19] int y = fact(x - 1); [L20] EXPR y * x [L20] return y * x; [L19] RET, EXPR fact(x - 1) [L19] int y = fact(x - 1); [L20] EXPR y * x [L20] return y * x; [L19] RET, EXPR fact(x - 1) [L19] int y = fact(x - 1); [L20] y * x - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 22 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 38.7s, OverallIterations: 7, TraceHistogramMax: 6, AutomataDifference: 3.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 57 SDtfs, 131 SDslu, 162 SDs, 0 SdLazy, 349 SolverSat, 46 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 2.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 119 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=29occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 12 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 111 NumberOfCodeBlocks, 111 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 105 ConstructedInterpolants, 4 QuantifiedInterpolants, 13090 SizeOfPredicates, 9 NumberOfNonLiveVariables, 238 ConjunctsInSsa, 56 ConjunctsInUnsatCore, 6 InterpolantComputations, 3 PerfectInterpolantSequences, 34/63 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...