./Ultimate.py --spec ../sv-benchmarks/c/properties/no-overflow.prp --file ../sv-benchmarks/c/signedintegeroverflow-regression/PostfixDecrement.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows 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/signedintegeroverflow-regression/PostfixDecrement.i -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 5098e3d431ffea128b6fb3ac04da30361a618d04 ................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(OVERFLOW) --- Real Ultimate output --- This is Ultimate 0.1.25-9a8b2e8 [2020-10-20 06:21:46,000 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 06:21:46,003 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 06:21:46,044 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 06:21:46,044 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 06:21:46,053 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 06:21:46,056 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 06:21:46,059 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 06:21:46,062 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 06:21:46,065 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 06:21:46,067 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 06:21:46,068 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 06:21:46,068 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 06:21:46,071 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 06:21:46,073 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 06:21:46,075 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 06:21:46,076 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 06:21:46,077 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 06:21:46,080 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 06:21:46,086 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 06:21:46,089 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 06:21:46,090 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 06:21:46,092 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 06:21:46,093 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 06:21:46,110 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 06:21:46,110 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 06:21:46,110 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 06:21:46,111 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 06:21:46,112 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 06:21:46,115 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 06:21:46,115 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 06:21:46,116 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 06:21:46,120 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 06:21:46,121 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 06:21:46,122 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 06:21:46,123 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 06:21:46,123 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 06:21:46,124 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 06:21:46,124 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 06:21:46,125 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 06:21:46,126 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 06:21:46,127 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-64bit-Automizer_Default.epf [2020-10-20 06:21:46,160 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 06:21:46,161 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 06:21:46,162 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 06:21:46,163 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 06:21:46,163 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 06:21:46,163 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 06:21:46,163 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-10-20 06:21:46,164 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-20 06:21:46,164 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 06:21:46,164 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-20 06:21:46,164 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-20 06:21:46,165 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-20 06:21:46,165 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2020-10-20 06:21:46,165 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-20 06:21:46,166 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 06:21:46,166 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-20 06:21:46,166 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 06:21:46,166 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 06:21:46,167 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-20 06:21:46,167 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-20 06:21:46,167 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 06:21:46,168 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 06:21:46,168 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-20 06:21:46,168 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-20 06:21:46,168 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-20 06:21:46,169 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-20 06:21:46,169 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-20 06:21:46,169 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 06:21:46,169 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 -> 5098e3d431ffea128b6fb3ac04da30361a618d04 [2020-10-20 06:21:46,385 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 06:21:46,400 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 06:21:46,405 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 06:21:46,406 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 06:21:46,407 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 06:21:46,408 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/signedintegeroverflow-regression/PostfixDecrement.i [2020-10-20 06:21:46,485 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b110d505/df54c48396754f07b3444fd2684daaa2/FLAG2dd2d5d4d [2020-10-20 06:21:46,970 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 06:21:46,974 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/signedintegeroverflow-regression/PostfixDecrement.i [2020-10-20 06:21:46,983 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b110d505/df54c48396754f07b3444fd2684daaa2/FLAG2dd2d5d4d [2020-10-20 06:21:47,294 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b110d505/df54c48396754f07b3444fd2684daaa2 [2020-10-20 06:21:47,297 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 06:21:47,304 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-20 06:21:47,306 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 06:21:47,306 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 06:21:47,310 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 06:21:47,311 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 06:21:47" (1/1) ... [2020-10-20 06:21:47,314 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a6ae4cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:21:47, skipping insertion in model container [2020-10-20 06:21:47,314 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 06:21:47" (1/1) ... [2020-10-20 06:21:47,322 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 06:21:47,372 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 06:21:47,759 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 06:21:47,770 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 06:21:47,806 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 06:21:47,856 INFO L208 MainTranslator]: Completed translation [2020-10-20 06:21:47,857 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:21:47 WrapperNode [2020-10-20 06:21:47,857 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 06:21:47,858 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-20 06:21:47,858 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-20 06:21:47,859 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-20 06:21:47,868 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:21:47" (1/1) ... [2020-10-20 06:21:47,882 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:21:47" (1/1) ... [2020-10-20 06:21:47,902 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-20 06:21:47,903 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 06:21:47,903 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 06:21:47,903 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 06:21:47,911 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:21:47" (1/1) ... [2020-10-20 06:21:47,911 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:21:47" (1/1) ... [2020-10-20 06:21:47,914 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:21:47" (1/1) ... [2020-10-20 06:21:47,914 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:21:47" (1/1) ... [2020-10-20 06:21:47,918 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:21:47" (1/1) ... [2020-10-20 06:21:47,920 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:21:47" (1/1) ... [2020-10-20 06:21:47,921 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:21:47" (1/1) ... [2020-10-20 06:21:47,923 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 06:21:47,923 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 06:21:47,923 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 06:21:47,924 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 06:21:47,925 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:21:47" (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 06:21:47,989 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-20 06:21:47,989 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-20 06:21:47,989 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 06:21:47,989 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 06:21:48,177 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 06:21:48,178 INFO L298 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-20 06:21:48,180 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 06:21:48 BoogieIcfgContainer [2020-10-20 06:21:48,180 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 06:21:48,181 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-20 06:21:48,182 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-20 06:21:48,185 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-20 06:21:48,186 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 06:21:47" (1/3) ... [2020-10-20 06:21:48,187 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7eaff833 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 06:21:48, skipping insertion in model container [2020-10-20 06:21:48,187 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:21:47" (2/3) ... [2020-10-20 06:21:48,188 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7eaff833 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 06:21:48, skipping insertion in model container [2020-10-20 06:21:48,188 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 06:21:48" (3/3) ... [2020-10-20 06:21:48,190 INFO L111 eAbstractionObserver]: Analyzing ICFG PostfixDecrement.i [2020-10-20 06:21:48,203 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-20 06:21:48,210 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-10-20 06:21:48,227 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-20 06:21:48,264 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-20 06:21:48,264 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-20 06:21:48,265 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-20 06:21:48,265 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 06:21:48,266 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 06:21:48,266 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-20 06:21:48,266 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 06:21:48,267 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-20 06:21:48,286 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states. [2020-10-20 06:21:48,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-10-20 06:21:48,293 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:21:48,294 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-10-20 06:21:48,295 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-10-20 06:21:48,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:21:48,303 INFO L82 PathProgramCache]: Analyzing trace with hash 29856, now seen corresponding path program 1 times [2020-10-20 06:21:48,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:21:48,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426638292] [2020-10-20 06:21:48,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:21:48,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:21:48,526 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 06:21:48,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426638292] [2020-10-20 06:21:48,528 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:21:48,529 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-20 06:21:48,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040813418] [2020-10-20 06:21:48,533 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-20 06:21:48,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:21:48,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-20 06:21:48,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-20 06:21:48,546 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 3 states. [2020-10-20 06:21:48,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:21:48,574 INFO L93 Difference]: Finished difference Result 9 states and 8 transitions. [2020-10-20 06:21:48,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-20 06:21:48,576 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-10-20 06:21:48,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:21:48,585 INFO L225 Difference]: With dead ends: 9 [2020-10-20 06:21:48,586 INFO L226 Difference]: Without dead ends: 5 [2020-10-20 06:21:48,589 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 [2020-10-20 06:21:48,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2020-10-20 06:21:48,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2020-10-20 06:21:48,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-10-20 06:21:48,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 4 transitions. [2020-10-20 06:21:48,622 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 4 transitions. Word has length 3 [2020-10-20 06:21:48,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:21:48,622 INFO L481 AbstractCegarLoop]: Abstraction has 5 states and 4 transitions. [2020-10-20 06:21:48,623 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-20 06:21:48,623 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 4 transitions. [2020-10-20 06:21:48,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-10-20 06:21:48,623 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:21:48,624 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-10-20 06:21:48,624 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-20 06:21:48,625 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-10-20 06:21:48,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:21:48,625 INFO L82 PathProgramCache]: Analyzing trace with hash 925572, now seen corresponding path program 1 times [2020-10-20 06:21:48,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:21:48,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886290544] [2020-10-20 06:21:48,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:21:48,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:21:48,644 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:21:48,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:21:48,655 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:21:48,678 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 06:21:48,679 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-20 06:21:48,680 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-20 06:21:48,707 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 06:21:48 BoogieIcfgContainer [2020-10-20 06:21:48,707 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-20 06:21:48,708 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 06:21:48,708 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 06:21:48,709 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 06:21:48,709 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 06:21:48" (3/4) ... [2020-10-20 06:21:48,712 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-10-20 06:21:48,759 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-20 06:21:48,759 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 06:21:48,762 INFO L168 Benchmark]: Toolchain (without parser) took 1462.02 ms. Allocated memory was 35.1 MB in the beginning and 46.7 MB in the end (delta: 11.5 MB). Free memory was 8.1 MB in the beginning and 9.6 MB in the end (delta: -1.5 MB). Peak memory consumption was 10.0 MB. Max. memory is 14.3 GB. [2020-10-20 06:21:48,763 INFO L168 Benchmark]: CDTParser took 0.40 ms. Allocated memory is still 35.1 MB. Free memory was 14.1 MB in the beginning and 14.1 MB in the end (delta: 49.4 kB). Peak memory consumption was 49.4 kB. Max. memory is 14.3 GB. [2020-10-20 06:21:48,764 INFO L168 Benchmark]: CACSL2BoogieTranslator took 552.17 ms. Allocated memory was 35.1 MB in the beginning and 45.1 MB in the end (delta: 10.0 MB). Free memory was 7.2 MB in the beginning and 19.0 MB in the end (delta: -11.7 MB). Peak memory consumption was 5.5 MB. Max. memory is 14.3 GB. [2020-10-20 06:21:48,765 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.40 ms. Allocated memory is still 45.1 MB. Free memory was 19.0 MB in the beginning and 17.1 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 14.3 GB. [2020-10-20 06:21:48,766 INFO L168 Benchmark]: Boogie Preprocessor took 19.97 ms. Allocated memory is still 45.1 MB. Free memory was 17.0 MB in the beginning and 15.9 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 14.3 GB. [2020-10-20 06:21:48,767 INFO L168 Benchmark]: RCFGBuilder took 256.93 ms. Allocated memory was 45.1 MB in the beginning and 46.1 MB in the end (delta: 1.0 MB). Free memory was 15.8 MB in the beginning and 19.0 MB in the end (delta: -3.3 MB). Peak memory consumption was 3.9 MB. Max. memory is 14.3 GB. [2020-10-20 06:21:48,768 INFO L168 Benchmark]: TraceAbstraction took 526.14 ms. Allocated memory was 46.1 MB in the beginning and 46.7 MB in the end (delta: 524.3 kB). Free memory was 18.6 MB in the beginning and 11.7 MB in the end (delta: 6.9 MB). Peak memory consumption was 7.4 MB. Max. memory is 14.3 GB. [2020-10-20 06:21:48,769 INFO L168 Benchmark]: Witness Printer took 51.38 ms. Allocated memory is still 46.7 MB. Free memory was 11.4 MB in the beginning and 9.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.5 MB. Max. memory is 14.3 GB. [2020-10-20 06:21:48,774 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.40 ms. Allocated memory is still 35.1 MB. Free memory was 14.1 MB in the beginning and 14.1 MB in the end (delta: 49.4 kB). Peak memory consumption was 49.4 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 552.17 ms. Allocated memory was 35.1 MB in the beginning and 45.1 MB in the end (delta: 10.0 MB). Free memory was 7.2 MB in the beginning and 19.0 MB in the end (delta: -11.7 MB). Peak memory consumption was 5.5 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 44.40 ms. Allocated memory is still 45.1 MB. Free memory was 19.0 MB in the beginning and 17.1 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 19.97 ms. Allocated memory is still 45.1 MB. Free memory was 17.0 MB in the beginning and 15.9 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 14.3 GB. * RCFGBuilder took 256.93 ms. Allocated memory was 45.1 MB in the beginning and 46.1 MB in the end (delta: 1.0 MB). Free memory was 15.8 MB in the beginning and 19.0 MB in the end (delta: -3.3 MB). Peak memory consumption was 3.9 MB. Max. memory is 14.3 GB. * TraceAbstraction took 526.14 ms. Allocated memory was 46.1 MB in the beginning and 46.7 MB in the end (delta: 524.3 kB). Free memory was 18.6 MB in the beginning and 11.7 MB in the end (delta: 6.9 MB). Peak memory consumption was 7.4 MB. Max. memory is 14.3 GB. * Witness Printer took 51.38 ms. Allocated memory is still 46.7 MB. Free memory was 11.4 MB in the beginning and 9.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.5 MB. Max. memory is 14.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 333]: integer overflow possible integer overflow possible We found a FailurePath: [L332] int x = -2147483647 - 1; [L333] x-- - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 9 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.4s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2 SDtfs, 2 SDslu, 1 SDs, 0 SdLazy, 2 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=9occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 7 NumberOfCodeBlocks, 7 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 2 ConstructedInterpolants, 0 QuantifiedInterpolants, 12 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...