./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-regression/test04.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9a8b2e8d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/ldv-regression/test04.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ca0d09300e53e1cc585be31c074ade2d50a94564 ......................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-9a8b2e8 [2020-10-20 00:43:38,017 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 00:43:38,019 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 00:43:38,043 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 00:43:38,044 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 00:43:38,045 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 00:43:38,046 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 00:43:38,048 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 00:43:38,050 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 00:43:38,051 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 00:43:38,052 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 00:43:38,053 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 00:43:38,053 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 00:43:38,055 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 00:43:38,056 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 00:43:38,057 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 00:43:38,058 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 00:43:38,059 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 00:43:38,061 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 00:43:38,063 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 00:43:38,065 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 00:43:38,066 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 00:43:38,067 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 00:43:38,068 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 00:43:38,071 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 00:43:38,072 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 00:43:38,072 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 00:43:38,073 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 00:43:38,074 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 00:43:38,075 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 00:43:38,075 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 00:43:38,076 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 00:43:38,077 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 00:43:38,077 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 00:43:38,079 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 00:43:38,079 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 00:43:38,080 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 00:43:38,080 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 00:43:38,080 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 00:43:38,081 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 00:43:38,082 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 00:43:38,083 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-20 00:43:38,137 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 00:43:38,138 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 00:43:38,139 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 00:43:38,142 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 00:43:38,142 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 00:43:38,142 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 00:43:38,142 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-20 00:43:38,142 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-20 00:43:38,142 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-20 00:43:38,143 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 00:43:38,143 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-20 00:43:38,143 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-20 00:43:38,143 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-20 00:43:38,143 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-20 00:43:38,144 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-20 00:43:38,144 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 00:43:38,145 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-20 00:43:38,145 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 00:43:38,145 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 00:43:38,146 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-20 00:43:38,146 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-20 00:43:38,146 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 00:43:38,147 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 00:43:38,147 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-20 00:43:38,147 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-20 00:43:38,147 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-20 00:43:38,147 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-20 00:43:38,148 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-20 00:43:38,148 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 00:43:38,148 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ca0d09300e53e1cc585be31c074ade2d50a94564 [2020-10-20 00:43:38,410 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 00:43:38,422 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 00:43:38,426 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 00:43:38,427 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 00:43:38,428 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 00:43:38,429 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-regression/test04.c [2020-10-20 00:43:38,504 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/871e02fa1/0ed1a6d43df444a388c5791c4fb50a70/FLAGe8e575514 [2020-10-20 00:43:38,938 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 00:43:38,939 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-regression/test04.c [2020-10-20 00:43:38,947 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/871e02fa1/0ed1a6d43df444a388c5791c4fb50a70/FLAGe8e575514 [2020-10-20 00:43:39,318 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/871e02fa1/0ed1a6d43df444a388c5791c4fb50a70 [2020-10-20 00:43:39,322 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 00:43:39,329 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-20 00:43:39,331 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 00:43:39,331 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 00:43:39,334 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 00:43:39,336 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:43:39" (1/1) ... [2020-10-20 00:43:39,339 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63344f5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:43:39, skipping insertion in model container [2020-10-20 00:43:39,339 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:43:39" (1/1) ... [2020-10-20 00:43:39,347 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 00:43:39,365 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 00:43:39,614 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:43:39,625 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 00:43:39,641 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:43:39,657 INFO L208 MainTranslator]: Completed translation [2020-10-20 00:43:39,658 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:43:39 WrapperNode [2020-10-20 00:43:39,658 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 00:43:39,659 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-20 00:43:39,659 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-20 00:43:39,660 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-20 00:43:39,667 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:43:39" (1/1) ... [2020-10-20 00:43:39,674 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:43:39" (1/1) ... [2020-10-20 00:43:39,693 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-20 00:43:39,693 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 00:43:39,693 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 00:43:39,694 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 00:43:39,700 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:43:39" (1/1) ... [2020-10-20 00:43:39,700 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:43:39" (1/1) ... [2020-10-20 00:43:39,702 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:43:39" (1/1) ... [2020-10-20 00:43:39,702 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:43:39" (1/1) ... [2020-10-20 00:43:39,707 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:43:39" (1/1) ... [2020-10-20 00:43:39,708 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:43:39" (1/1) ... [2020-10-20 00:43:39,709 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:43:39" (1/1) ... [2020-10-20 00:43:39,711 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 00:43:39,712 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 00:43:39,712 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 00:43:39,712 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 00:43:39,713 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:43:39" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 00:43:39,776 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-20 00:43:39,777 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 00:43:39,777 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 00:43:39,777 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-20 00:43:39,777 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-20 00:43:39,777 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-20 00:43:39,777 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-20 00:43:39,995 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 00:43:39,996 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-10-20 00:43:39,998 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:43:39 BoogieIcfgContainer [2020-10-20 00:43:39,998 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 00:43:39,999 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-20 00:43:40,000 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-20 00:43:40,003 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-20 00:43:40,004 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 12:43:39" (1/3) ... [2020-10-20 00:43:40,004 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2716eeba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:43:40, skipping insertion in model container [2020-10-20 00:43:40,005 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:43:39" (2/3) ... [2020-10-20 00:43:40,005 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2716eeba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:43:40, skipping insertion in model container [2020-10-20 00:43:40,005 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:43:39" (3/3) ... [2020-10-20 00:43:40,007 INFO L111 eAbstractionObserver]: Analyzing ICFG test04.c [2020-10-20 00:43:40,019 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-20 00:43:40,027 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-20 00:43:40,042 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-20 00:43:40,102 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-20 00:43:40,103 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-20 00:43:40,103 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-20 00:43:40,103 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 00:43:40,103 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 00:43:40,104 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-20 00:43:40,104 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 00:43:40,104 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-20 00:43:40,126 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states. [2020-10-20 00:43:40,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-10-20 00:43:40,133 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:43:40,134 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-10-20 00:43:40,135 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:43:40,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:43:40,141 INFO L82 PathProgramCache]: Analyzing trace with hash 28692805, now seen corresponding path program 1 times [2020-10-20 00:43:40,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:43:40,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051406467] [2020-10-20 00:43:40,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:43:40,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:43:40,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:43:40,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051406467] [2020-10-20 00:43:40,368 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:43:40,368 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 00:43:40,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958285477] [2020-10-20 00:43:40,374 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 00:43:40,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:43:40,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 00:43:40,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 00:43:40,392 INFO L87 Difference]: Start difference. First operand 10 states. Second operand 4 states. [2020-10-20 00:43:40,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:43:40,459 INFO L93 Difference]: Finished difference Result 13 states and 12 transitions. [2020-10-20 00:43:40,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 00:43:40,462 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2020-10-20 00:43:40,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:43:40,475 INFO L225 Difference]: With dead ends: 13 [2020-10-20 00:43:40,475 INFO L226 Difference]: Without dead ends: 0 [2020-10-20 00:43:40,479 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 00:43:40,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-20 00:43:40,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-20 00:43:40,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-20 00:43:40,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-20 00:43:40,499 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 5 [2020-10-20 00:43:40,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:43:40,499 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-20 00:43:40,499 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 00:43:40,500 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-20 00:43:40,500 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-20 00:43:40,500 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-20 00:43:40,502 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-20 00:43:40,528 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-20 00:43:40,528 INFO L274 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-10-20 00:43:40,528 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-10-20 00:43:40,528 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-20 00:43:40,529 INFO L277 CegarLoopResult]: At program point L25(lines 10 26) the Hoare annotation is: true [2020-10-20 00:43:40,529 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-10-20 00:43:40,529 INFO L270 CegarLoopResult]: At program point L19(lines 10 26) the Hoare annotation is: false [2020-10-20 00:43:40,529 INFO L274 CegarLoopResult]: For program point L18(lines 18 20) no Hoare annotation was computed. [2020-10-20 00:43:40,529 INFO L270 CegarLoopResult]: At program point L7(lines 6 8) the Hoare annotation is: (and (= ULTIMATE.start_main_~p1~0.offset |ULTIMATE.start_main_~#a~0.offset|) (= |ULTIMATE.start_main_~#a~0.base| ULTIMATE.start_main_~p1~0.base) (= |ULTIMATE.start_f_#res| 0)) [2020-10-20 00:43:40,530 INFO L274 CegarLoopResult]: For program point L3(line 3) no Hoare annotation was computed. [2020-10-20 00:43:40,549 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 12:43:40 BoogieIcfgContainer [2020-10-20 00:43:40,549 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-20 00:43:40,549 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 00:43:40,549 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 00:43:40,550 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 00:43:40,550 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:43:39" (3/4) ... [2020-10-20 00:43:40,554 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-10-20 00:43:40,566 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2020-10-20 00:43:40,566 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2020-10-20 00:43:40,567 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-20 00:43:40,567 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-20 00:43:40,595 WARN L221 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (p1 == a && a == p1) && \result == 0 [2020-10-20 00:43:40,618 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-20 00:43:40,618 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 00:43:40,621 INFO L168 Benchmark]: Toolchain (without parser) took 1295.96 ms. Allocated memory was 35.1 MB in the beginning and 46.1 MB in the end (delta: 11.0 MB). Free memory was 8.9 MB in the beginning and 10.6 MB in the end (delta: -1.7 MB). Peak memory consumption was 9.3 MB. Max. memory is 14.3 GB. [2020-10-20 00:43:40,621 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 34.1 MB. Free memory was 13.3 MB in the beginning and 13.3 MB in the end (delta: 3.1 kB). Peak memory consumption was 3.1 kB. Max. memory is 14.3 GB. [2020-10-20 00:43:40,622 INFO L168 Benchmark]: CACSL2BoogieTranslator took 327.90 ms. Allocated memory was 35.1 MB in the beginning and 44.6 MB in the end (delta: 9.4 MB). Free memory was 8.1 MB in the beginning and 28.0 MB in the end (delta: -19.9 MB). Peak memory consumption was 7.0 MB. Max. memory is 14.3 GB. [2020-10-20 00:43:40,623 INFO L168 Benchmark]: Boogie Procedure Inliner took 33.98 ms. Allocated memory is still 44.6 MB. Free memory was 27.8 MB in the beginning and 26.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 14.3 GB. [2020-10-20 00:43:40,624 INFO L168 Benchmark]: Boogie Preprocessor took 18.10 ms. Allocated memory is still 44.6 MB. Free memory was 26.2 MB in the beginning and 25.1 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.2 MB. Max. memory is 14.3 GB. [2020-10-20 00:43:40,625 INFO L168 Benchmark]: RCFGBuilder took 286.53 ms. Allocated memory was 44.6 MB in the beginning and 46.1 MB in the end (delta: 1.6 MB). Free memory was 24.9 MB in the beginning and 25.0 MB in the end (delta: -97.9 kB). Peak memory consumption was 13.5 MB. Max. memory is 14.3 GB. [2020-10-20 00:43:40,625 INFO L168 Benchmark]: TraceAbstraction took 549.54 ms. Allocated memory is still 46.1 MB. Free memory was 24.6 MB in the beginning and 13.9 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 14.3 GB. [2020-10-20 00:43:40,626 INFO L168 Benchmark]: Witness Printer took 68.91 ms. Allocated memory is still 46.1 MB. Free memory was 13.6 MB in the beginning and 10.9 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 14.3 GB. [2020-10-20 00:43:40,631 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 34.1 MB. Free memory was 13.3 MB in the beginning and 13.3 MB in the end (delta: 3.1 kB). Peak memory consumption was 3.1 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 327.90 ms. Allocated memory was 35.1 MB in the beginning and 44.6 MB in the end (delta: 9.4 MB). Free memory was 8.1 MB in the beginning and 28.0 MB in the end (delta: -19.9 MB). Peak memory consumption was 7.0 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 33.98 ms. Allocated memory is still 44.6 MB. Free memory was 27.8 MB in the beginning and 26.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 18.10 ms. Allocated memory is still 44.6 MB. Free memory was 26.2 MB in the beginning and 25.1 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.2 MB. Max. memory is 14.3 GB. * RCFGBuilder took 286.53 ms. Allocated memory was 44.6 MB in the beginning and 46.1 MB in the end (delta: 1.6 MB). Free memory was 24.9 MB in the beginning and 25.0 MB in the end (delta: -97.9 kB). Peak memory consumption was 13.5 MB. Max. memory is 14.3 GB. * TraceAbstraction took 549.54 ms. Allocated memory is still 46.1 MB. Free memory was 24.6 MB in the beginning and 13.9 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 14.3 GB. * Witness Printer took 68.91 ms. Allocated memory is still 46.1 MB. Free memory was 13.6 MB in the beginning and 10.9 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 14.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 3]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 6]: Loop Invariant Derived loop invariant: (p1 == a && a == p1) && \result == 0 - InvariantResult [Line: 10]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 10]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 10 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 0.4s, OverallIterations: 1, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 4 SDtfs, 1 SDslu, 6 SDs, 0 SdLazy, 5 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=10occurred 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: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 4 NumberOfFragments, 12 HoareAnnotationTreeSize, 3 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 5 NumberOfCodeBlocks, 5 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 4 ConstructedInterpolants, 0 QuantifiedInterpolants, 60 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 correct! Received shutdown request...