./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops/for_bounded_loop1.c --full-output -ea --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8bd4bc60 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -ea -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/loops/for_bounded_loop1.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(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4255287c81d8b00fd93f76bd93c9207de0e547db ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.25-8bd4bc6 [2020-07-28 18:10:27,794 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-28 18:10:27,797 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-28 18:10:27,815 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-28 18:10:27,816 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-28 18:10:27,818 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-28 18:10:27,820 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-28 18:10:27,829 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-28 18:10:27,831 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-28 18:10:27,832 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-28 18:10:27,833 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-28 18:10:27,834 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-28 18:10:27,835 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-28 18:10:27,836 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-28 18:10:27,837 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-28 18:10:27,838 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-28 18:10:27,839 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-28 18:10:27,840 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-28 18:10:27,842 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-28 18:10:27,844 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-28 18:10:27,846 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-28 18:10:27,847 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-28 18:10:27,849 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-28 18:10:27,850 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-28 18:10:27,854 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-28 18:10:27,855 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-28 18:10:27,855 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-28 18:10:27,856 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-28 18:10:27,857 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-28 18:10:27,858 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-28 18:10:27,858 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-28 18:10:27,859 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-28 18:10:27,860 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-28 18:10:27,861 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-28 18:10:27,862 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-28 18:10:27,862 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-28 18:10:27,863 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-28 18:10:27,863 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-28 18:10:27,864 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-28 18:10:27,865 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-28 18:10:27,865 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-28 18:10:27,866 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-28 18:10:27,881 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-28 18:10:27,882 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-28 18:10:27,889 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-28 18:10:27,889 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-28 18:10:27,889 INFO L138 SettingsManager]: * Use SBE=true [2020-07-28 18:10:27,890 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-28 18:10:27,890 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-28 18:10:27,890 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-28 18:10:27,890 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-28 18:10:27,890 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-28 18:10:27,891 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-28 18:10:27,891 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-28 18:10:27,891 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-28 18:10:27,891 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-28 18:10:27,892 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-28 18:10:27,892 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-28 18:10:27,892 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-28 18:10:27,893 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-28 18:10:27,893 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-28 18:10:27,893 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-28 18:10:27,893 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-28 18:10:27,894 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-28 18:10:27,894 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-28 18:10:27,894 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-28 18:10:27,895 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-28 18:10:27,895 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-28 18:10:27,895 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-28 18:10:27,896 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-28 18:10:27,896 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-28 18:10:27,896 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(__VERIFIER_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 -> 4255287c81d8b00fd93f76bd93c9207de0e547db [2020-07-28 18:10:28,241 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-28 18:10:28,255 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-28 18:10:28,259 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-28 18:10:28,261 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-28 18:10:28,262 INFO L275 PluginConnector]: CDTParser initialized [2020-07-28 18:10:28,262 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/for_bounded_loop1.c [2020-07-28 18:10:28,342 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fbce0e232/920e4ac43f9b41e1bc2632842c5228d7/FLAGb2d97569e [2020-07-28 18:10:28,819 INFO L306 CDTParser]: Found 1 translation units. [2020-07-28 18:10:28,819 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/for_bounded_loop1.c [2020-07-28 18:10:28,827 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fbce0e232/920e4ac43f9b41e1bc2632842c5228d7/FLAGb2d97569e [2020-07-28 18:10:29,203 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fbce0e232/920e4ac43f9b41e1bc2632842c5228d7 [2020-07-28 18:10:29,206 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-28 18:10:29,209 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-07-28 18:10:29,210 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-28 18:10:29,211 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-28 18:10:29,214 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-28 18:10:29,215 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.07 06:10:29" (1/1) ... [2020-07-28 18:10:29,218 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@735ac4c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.07 06:10:29, skipping insertion in model container [2020-07-28 18:10:29,219 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.07 06:10:29" (1/1) ... [2020-07-28 18:10:29,226 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-28 18:10:29,244 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-28 18:10:29,404 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-28 18:10:29,409 INFO L203 MainTranslator]: Completed pre-run [2020-07-28 18:10:29,427 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-28 18:10:29,443 INFO L208 MainTranslator]: Completed translation [2020-07-28 18:10:29,444 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.07 06:10:29 WrapperNode [2020-07-28 18:10:29,444 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-28 18:10:29,445 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-07-28 18:10:29,445 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-07-28 18:10:29,446 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-07-28 18:10:29,455 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.07 06:10:29" (1/1) ... [2020-07-28 18:10:29,461 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.07 06:10:29" (1/1) ... [2020-07-28 18:10:29,553 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-07-28 18:10:29,553 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-28 18:10:29,553 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-28 18:10:29,554 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-28 18:10:29,563 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.07 06:10:29" (1/1) ... [2020-07-28 18:10:29,564 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.07 06:10:29" (1/1) ... [2020-07-28 18:10:29,565 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.07 06:10:29" (1/1) ... [2020-07-28 18:10:29,565 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.07 06:10:29" (1/1) ... [2020-07-28 18:10:29,568 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.07 06:10:29" (1/1) ... [2020-07-28 18:10:29,580 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.07 06:10:29" (1/1) ... [2020-07-28 18:10:29,586 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.07 06:10:29" (1/1) ... [2020-07-28 18:10:29,593 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-28 18:10:29,594 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-28 18:10:29,594 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-28 18:10:29,594 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-28 18:10:29,595 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.07 06:10:29" (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 [2020-07-28 18:10:29,659 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-28 18:10:29,659 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-28 18:10:29,904 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-28 18:10:29,905 INFO L295 CfgBuilder]: Removed 11 assume(true) statements. [2020-07-28 18:10:29,909 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.07 06:10:29 BoogieIcfgContainer [2020-07-28 18:10:29,909 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-28 18:10:29,911 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-28 18:10:29,911 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-28 18:10:29,915 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-28 18:10:29,916 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.07 06:10:29" (1/3) ... [2020-07-28 18:10:29,917 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5dbaccc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.07 06:10:29, skipping insertion in model container [2020-07-28 18:10:29,917 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.07 06:10:29" (2/3) ... [2020-07-28 18:10:29,918 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5dbaccc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.07 06:10:29, skipping insertion in model container [2020-07-28 18:10:29,918 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.07 06:10:29" (3/3) ... [2020-07-28 18:10:29,920 INFO L109 eAbstractionObserver]: Analyzing ICFG for_bounded_loop1.c [2020-07-28 18:10:29,934 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-28 18:10:29,943 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2020-07-28 18:10:29,960 INFO L251 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-07-28 18:10:29,988 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-28 18:10:29,989 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-28 18:10:29,989 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-28 18:10:29,989 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-28 18:10:29,990 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-28 18:10:29,990 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-28 18:10:29,990 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-28 18:10:29,990 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-28 18:10:30,009 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-07-28 18:10:30,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-07-28 18:10:30,016 INFO L414 BasicCegarLoop]: Found error trace [2020-07-28 18:10:30,017 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-07-28 18:10:30,018 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-28 18:10:30,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-28 18:10:30,026 INFO L82 PathProgramCache]: Analyzing trace with hash 29745418, now seen corresponding path program 1 times [2020-07-28 18:10:30,037 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-28 18:10:30,038 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63092523] [2020-07-28 18:10:30,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-28 18:10:30,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-28 18:10:30,259 INFO L280 TraceCheckUtils]: 0: Hoare triple {22#true} havoc main_#res;havoc main_#t~nondet0, main_#t~nondet2, main_#t~post1, main_~i~0, main_~x~0, main_~y~0, main_~n~0;main_~i~0 := 0;main_~x~0 := 0;main_~y~0 := 0;assume -2147483648 <= main_#t~nondet0 && main_#t~nondet0 <= 2147483647;main_~n~0 := main_#t~nondet0;havoc main_#t~nondet0; {24#(and (<= ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 ULTIMATE.start_main_~y~0))} is VALID [2020-07-28 18:10:30,261 INFO L280 TraceCheckUtils]: 1: Hoare triple {24#(and (<= ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 ULTIMATE.start_main_~y~0))} assume !!(main_~n~0 > 0);main_~i~0 := 0; {24#(and (<= ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 ULTIMATE.start_main_~y~0))} is VALID [2020-07-28 18:10:30,263 INFO L280 TraceCheckUtils]: 2: Hoare triple {24#(and (<= ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 ULTIMATE.start_main_~y~0))} assume !!(main_~i~0 < main_~n~0);main_~x~0 := main_~x~0 - main_~y~0;__VERIFIER_assert_#in~cond := (if 0 == main_~x~0 then 1 else 0);havoc __VERIFIER_assert_~cond;__VERIFIER_assert_~cond := __VERIFIER_assert_#in~cond; {25#(not (= 0 ULTIMATE.start___VERIFIER_assert_~cond))} is VALID [2020-07-28 18:10:30,265 INFO L280 TraceCheckUtils]: 3: Hoare triple {25#(not (= 0 ULTIMATE.start___VERIFIER_assert_~cond))} assume 0 == __VERIFIER_assert_~cond; {23#false} is VALID [2020-07-28 18:10:30,265 INFO L280 TraceCheckUtils]: 4: Hoare triple {23#false} assume !false; {23#false} is VALID [2020-07-28 18:10:30,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-28 18:10:30,269 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63092523] [2020-07-28 18:10:30,271 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-28 18:10:30,271 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-28 18:10:30,272 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037844273] [2020-07-28 18:10:30,279 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2020-07-28 18:10:30,280 INFO L84 Accepts]: Finished accepts. word is accepted. [2020-07-28 18:10:30,284 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 4 states. [2020-07-28 18:10:30,298 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 5 edges. 5 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-28 18:10:30,298 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-28 18:10:30,299 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-28 18:10:30,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-28 18:10:30,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-28 18:10:30,312 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 4 states. [2020-07-28 18:10:30,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-28 18:10:30,509 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2020-07-28 18:10:30,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-28 18:10:30,510 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2020-07-28 18:10:30,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-28 18:10:30,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-07-28 18:10:30,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 61 transitions. [2020-07-28 18:10:30,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-07-28 18:10:30,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 61 transitions. [2020-07-28 18:10:30,537 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 5 states and 61 transitions. [2020-07-28 18:10:30,642 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 61 edges. 61 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-28 18:10:30,654 INFO L225 Difference]: With dead ends: 48 [2020-07-28 18:10:30,654 INFO L226 Difference]: Without dead ends: 22 [2020-07-28 18:10:30,658 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-28 18:10:30,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-07-28 18:10:30,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 18. [2020-07-28 18:10:30,697 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2020-07-28 18:10:30,698 INFO L82 GeneralOperation]: Start isEquivalent. First operand 22 states. Second operand 18 states. [2020-07-28 18:10:30,699 INFO L74 IsIncluded]: Start isIncluded. First operand 22 states. Second operand 18 states. [2020-07-28 18:10:30,699 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 18 states. [2020-07-28 18:10:30,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-28 18:10:30,703 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2020-07-28 18:10:30,703 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2020-07-28 18:10:30,703 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-28 18:10:30,704 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2020-07-28 18:10:30,704 INFO L74 IsIncluded]: Start isIncluded. First operand 18 states. Second operand 22 states. [2020-07-28 18:10:30,704 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 22 states. [2020-07-28 18:10:30,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-28 18:10:30,707 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2020-07-28 18:10:30,707 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2020-07-28 18:10:30,708 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-28 18:10:30,708 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2020-07-28 18:10:30,708 INFO L88 GeneralOperation]: Finished isEquivalent. [2020-07-28 18:10:30,709 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2020-07-28 18:10:30,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-07-28 18:10:30,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-07-28 18:10:30,712 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 5 [2020-07-28 18:10:30,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-28 18:10:30,713 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-07-28 18:10:30,713 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-28 18:10:30,713 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-07-28 18:10:30,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-07-28 18:10:30,714 INFO L414 BasicCegarLoop]: Found error trace [2020-07-28 18:10:30,714 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-07-28 18:10:30,715 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-28 18:10:30,715 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-28 18:10:30,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-28 18:10:30,716 INFO L82 PathProgramCache]: Analyzing trace with hash 922077226, now seen corresponding path program 1 times [2020-07-28 18:10:30,716 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-28 18:10:30,717 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115414222] [2020-07-28 18:10:30,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-28 18:10:30,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-28 18:10:30,751 INFO L280 TraceCheckUtils]: 0: Hoare triple {155#true} havoc main_#res;havoc main_#t~nondet0, main_#t~nondet2, main_#t~post1, main_~i~0, main_~x~0, main_~y~0, main_~n~0;main_~i~0 := 0;main_~x~0 := 0;main_~y~0 := 0;assume -2147483648 <= main_#t~nondet0 && main_#t~nondet0 <= 2147483647;main_~n~0 := main_#t~nondet0;havoc main_#t~nondet0; {155#true} is VALID [2020-07-28 18:10:30,752 INFO L280 TraceCheckUtils]: 1: Hoare triple {155#true} assume !!(main_~n~0 > 0);main_~i~0 := 0; {157#(<= (+ ULTIMATE.start_main_~i~0 1) ULTIMATE.start_main_~n~0)} is VALID [2020-07-28 18:10:30,753 INFO L280 TraceCheckUtils]: 2: Hoare triple {157#(<= (+ ULTIMATE.start_main_~i~0 1) ULTIMATE.start_main_~n~0)} assume !(main_~i~0 < main_~n~0); {156#false} is VALID [2020-07-28 18:10:30,754 INFO L280 TraceCheckUtils]: 3: Hoare triple {156#false} __VERIFIER_assert_#in~cond := (if 0 == main_~x~0 then 1 else 0);havoc __VERIFIER_assert_~cond;__VERIFIER_assert_~cond := __VERIFIER_assert_#in~cond; {156#false} is VALID [2020-07-28 18:10:30,754 INFO L280 TraceCheckUtils]: 4: Hoare triple {156#false} assume 0 == __VERIFIER_assert_~cond; {156#false} is VALID [2020-07-28 18:10:30,755 INFO L280 TraceCheckUtils]: 5: Hoare triple {156#false} assume !false; {156#false} is VALID [2020-07-28 18:10:30,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-28 18:10:30,756 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115414222] [2020-07-28 18:10:30,756 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-28 18:10:30,756 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-28 18:10:30,756 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144514001] [2020-07-28 18:10:30,758 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-07-28 18:10:30,759 INFO L84 Accepts]: Finished accepts. word is accepted. [2020-07-28 18:10:30,759 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 3 states. [2020-07-28 18:10:30,768 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 6 edges. 6 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-28 18:10:30,768 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-28 18:10:30,768 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-28 18:10:30,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-28 18:10:30,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-28 18:10:30,770 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 3 states. [2020-07-28 18:10:30,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-28 18:10:30,816 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2020-07-28 18:10:30,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-28 18:10:30,816 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-07-28 18:10:30,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-28 18:10:30,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-07-28 18:10:30,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 21 transitions. [2020-07-28 18:10:30,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-07-28 18:10:30,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 21 transitions. [2020-07-28 18:10:30,820 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 3 states and 21 transitions. [2020-07-28 18:10:30,851 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 21 edges. 21 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-28 18:10:30,852 INFO L225 Difference]: With dead ends: 22 [2020-07-28 18:10:30,852 INFO L226 Difference]: Without dead ends: 18 [2020-07-28 18:10:30,854 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-28 18:10:30,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-07-28 18:10:30,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-07-28 18:10:30,865 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2020-07-28 18:10:30,865 INFO L82 GeneralOperation]: Start isEquivalent. First operand 18 states. Second operand 18 states. [2020-07-28 18:10:30,865 INFO L74 IsIncluded]: Start isIncluded. First operand 18 states. Second operand 18 states. [2020-07-28 18:10:30,866 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 18 states. [2020-07-28 18:10:30,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-28 18:10:30,867 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2020-07-28 18:10:30,867 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2020-07-28 18:10:30,868 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-28 18:10:30,868 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2020-07-28 18:10:30,868 INFO L74 IsIncluded]: Start isIncluded. First operand 18 states. Second operand 18 states. [2020-07-28 18:10:30,868 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 18 states. [2020-07-28 18:10:30,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-28 18:10:30,870 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2020-07-28 18:10:30,871 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2020-07-28 18:10:30,871 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-28 18:10:30,871 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2020-07-28 18:10:30,871 INFO L88 GeneralOperation]: Finished isEquivalent. [2020-07-28 18:10:30,872 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2020-07-28 18:10:30,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-07-28 18:10:30,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2020-07-28 18:10:30,874 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 6 [2020-07-28 18:10:30,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-28 18:10:30,874 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2020-07-28 18:10:30,874 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-28 18:10:30,874 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2020-07-28 18:10:30,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-07-28 18:10:30,875 INFO L414 BasicCegarLoop]: Found error trace [2020-07-28 18:10:30,875 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-07-28 18:10:30,876 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-28 18:10:30,876 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-28 18:10:30,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-28 18:10:30,876 INFO L82 PathProgramCache]: Analyzing trace with hash 1387310901, now seen corresponding path program 1 times [2020-07-28 18:10:30,877 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-28 18:10:30,877 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809333526] [2020-07-28 18:10:30,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-28 18:10:30,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-28 18:10:31,011 INFO L280 TraceCheckUtils]: 0: Hoare triple {244#true} havoc main_#res;havoc main_#t~nondet0, main_#t~nondet2, main_#t~post1, main_~i~0, main_~x~0, main_~y~0, main_~n~0;main_~i~0 := 0;main_~x~0 := 0;main_~y~0 := 0;assume -2147483648 <= main_#t~nondet0 && main_#t~nondet0 <= 2147483647;main_~n~0 := main_#t~nondet0;havoc main_#t~nondet0; {246#(and (<= ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 ULTIMATE.start_main_~y~0))} is VALID [2020-07-28 18:10:31,012 INFO L280 TraceCheckUtils]: 1: Hoare triple {246#(and (<= ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 ULTIMATE.start_main_~y~0))} assume !!(main_~n~0 > 0);main_~i~0 := 0; {246#(and (<= ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 ULTIMATE.start_main_~y~0))} is VALID [2020-07-28 18:10:31,013 INFO L280 TraceCheckUtils]: 2: Hoare triple {246#(and (<= ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 ULTIMATE.start_main_~y~0))} assume !!(main_~i~0 < main_~n~0);main_~x~0 := main_~x~0 - main_~y~0;__VERIFIER_assert_#in~cond := (if 0 == main_~x~0 then 1 else 0);havoc __VERIFIER_assert_~cond;__VERIFIER_assert_~cond := __VERIFIER_assert_#in~cond; {247#(and (<= ULTIMATE.start_main_~x~0 0) (<= 0 ULTIMATE.start_main_~x~0))} is VALID [2020-07-28 18:10:31,014 INFO L280 TraceCheckUtils]: 3: Hoare triple {247#(and (<= ULTIMATE.start_main_~x~0 0) (<= 0 ULTIMATE.start_main_~x~0))} assume !(0 == __VERIFIER_assert_~cond); {247#(and (<= ULTIMATE.start_main_~x~0 0) (<= 0 ULTIMATE.start_main_~x~0))} is VALID [2020-07-28 18:10:31,015 INFO L280 TraceCheckUtils]: 4: Hoare triple {247#(and (<= ULTIMATE.start_main_~x~0 0) (<= 0 ULTIMATE.start_main_~x~0))} assume -2147483648 <= main_#t~nondet2 && main_#t~nondet2 <= 2147483647;main_~y~0 := main_#t~nondet2;havoc main_#t~nondet2; {247#(and (<= ULTIMATE.start_main_~x~0 0) (<= 0 ULTIMATE.start_main_~x~0))} is VALID [2020-07-28 18:10:31,017 INFO L280 TraceCheckUtils]: 5: Hoare triple {247#(and (<= ULTIMATE.start_main_~x~0 0) (<= 0 ULTIMATE.start_main_~x~0))} assume !!(0 != main_~y~0);main_~x~0 := main_~x~0 + main_~y~0;__VERIFIER_assert_#in~cond := (if 0 != main_~x~0 then 1 else 0);havoc __VERIFIER_assert_~cond;__VERIFIER_assert_~cond := __VERIFIER_assert_#in~cond; {248#(not (= 0 ULTIMATE.start___VERIFIER_assert_~cond))} is VALID [2020-07-28 18:10:31,018 INFO L280 TraceCheckUtils]: 6: Hoare triple {248#(not (= 0 ULTIMATE.start___VERIFIER_assert_~cond))} assume 0 == __VERIFIER_assert_~cond; {245#false} is VALID [2020-07-28 18:10:31,018 INFO L280 TraceCheckUtils]: 7: Hoare triple {245#false} assume !false; {245#false} is VALID [2020-07-28 18:10:31,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-28 18:10:31,019 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809333526] [2020-07-28 18:10:31,020 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-28 18:10:31,020 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-28 18:10:31,020 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109847268] [2020-07-28 18:10:31,021 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-07-28 18:10:31,021 INFO L84 Accepts]: Finished accepts. word is accepted. [2020-07-28 18:10:31,021 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 5 states. [2020-07-28 18:10:31,034 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 8 edges. 8 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-28 18:10:31,035 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-28 18:10:31,035 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-28 18:10:31,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-28 18:10:31,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-28 18:10:31,036 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 5 states. [2020-07-28 18:10:31,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-28 18:10:31,202 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2020-07-28 18:10:31,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-28 18:10:31,203 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-07-28 18:10:31,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-28 18:10:31,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-07-28 18:10:31,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 19 transitions. [2020-07-28 18:10:31,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-07-28 18:10:31,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 19 transitions. [2020-07-28 18:10:31,207 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 7 states and 19 transitions. [2020-07-28 18:10:31,234 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 19 edges. 19 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-28 18:10:31,235 INFO L225 Difference]: With dead ends: 19 [2020-07-28 18:10:31,235 INFO L226 Difference]: Without dead ends: 15 [2020-07-28 18:10:31,236 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-07-28 18:10:31,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-07-28 18:10:31,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 13. [2020-07-28 18:10:31,252 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2020-07-28 18:10:31,252 INFO L82 GeneralOperation]: Start isEquivalent. First operand 15 states. Second operand 13 states. [2020-07-28 18:10:31,252 INFO L74 IsIncluded]: Start isIncluded. First operand 15 states. Second operand 13 states. [2020-07-28 18:10:31,252 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 13 states. [2020-07-28 18:10:31,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-28 18:10:31,254 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2020-07-28 18:10:31,254 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-07-28 18:10:31,254 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-28 18:10:31,255 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2020-07-28 18:10:31,255 INFO L74 IsIncluded]: Start isIncluded. First operand 13 states. Second operand 15 states. [2020-07-28 18:10:31,255 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 15 states. [2020-07-28 18:10:31,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-28 18:10:31,257 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2020-07-28 18:10:31,257 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-07-28 18:10:31,258 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-28 18:10:31,258 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2020-07-28 18:10:31,258 INFO L88 GeneralOperation]: Finished isEquivalent. [2020-07-28 18:10:31,259 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2020-07-28 18:10:31,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-07-28 18:10:31,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-07-28 18:10:31,260 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 8 [2020-07-28 18:10:31,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-28 18:10:31,261 INFO L479 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-07-28 18:10:31,261 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-28 18:10:31,261 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-07-28 18:10:31,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-07-28 18:10:31,262 INFO L414 BasicCegarLoop]: Found error trace [2020-07-28 18:10:31,262 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-28 18:10:31,263 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-28 18:10:31,263 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-28 18:10:31,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-28 18:10:31,264 INFO L82 PathProgramCache]: Analyzing trace with hash 681382811, now seen corresponding path program 1 times [2020-07-28 18:10:31,264 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-28 18:10:31,265 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847620530] [2020-07-28 18:10:31,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-28 18:10:31,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-28 18:10:31,287 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-28 18:10:31,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-28 18:10:31,305 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-28 18:10:31,326 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-07-28 18:10:31,326 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-28 18:10:31,327 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-28 18:10:31,348 WARN L170 areAnnotationChecker]: ULTIMATE.startENTRY has no Hoare annotation [2020-07-28 18:10:31,349 WARN L170 areAnnotationChecker]: L19 has no Hoare annotation [2020-07-28 18:10:31,349 WARN L170 areAnnotationChecker]: L19 has no Hoare annotation [2020-07-28 18:10:31,349 WARN L170 areAnnotationChecker]: L8-8 has no Hoare annotation [2020-07-28 18:10:31,349 WARN L170 areAnnotationChecker]: L20-2 has no Hoare annotation [2020-07-28 18:10:31,350 WARN L170 areAnnotationChecker]: L20-2 has no Hoare annotation [2020-07-28 18:10:31,350 WARN L170 areAnnotationChecker]: L20-2 has no Hoare annotation [2020-07-28 18:10:31,350 WARN L170 areAnnotationChecker]: ULTIMATE.startFINAL has no Hoare annotation [2020-07-28 18:10:31,350 WARN L170 areAnnotationChecker]: L20-3 has no Hoare annotation [2020-07-28 18:10:31,350 WARN L170 areAnnotationChecker]: L8 has no Hoare annotation [2020-07-28 18:10:31,351 WARN L170 areAnnotationChecker]: L8 has no Hoare annotation [2020-07-28 18:10:31,351 WARN L170 areAnnotationChecker]: L8-6 has no Hoare annotation [2020-07-28 18:10:31,351 WARN L170 areAnnotationChecker]: L8-6 has no Hoare annotation [2020-07-28 18:10:31,351 WARN L170 areAnnotationChecker]: L9 has no Hoare annotation [2020-07-28 18:10:31,352 WARN L170 areAnnotationChecker]: L9 has no Hoare annotation [2020-07-28 18:10:31,352 WARN L170 areAnnotationChecker]: L8-2 has no Hoare annotation [2020-07-28 18:10:31,352 WARN L170 areAnnotationChecker]: L9-2 has no Hoare annotation [2020-07-28 18:10:31,352 WARN L170 areAnnotationChecker]: L9-2 has no Hoare annotation [2020-07-28 18:10:31,352 WARN L170 areAnnotationChecker]: L25 has no Hoare annotation [2020-07-28 18:10:31,353 WARN L170 areAnnotationChecker]: L25 has no Hoare annotation [2020-07-28 18:10:31,353 WARN L170 areAnnotationChecker]: L8-3 has no Hoare annotation [2020-07-28 18:10:31,353 WARN L170 areAnnotationChecker]: L8-3 has no Hoare annotation [2020-07-28 18:10:31,353 WARN L170 areAnnotationChecker]: L9-1 has no Hoare annotation [2020-07-28 18:10:31,354 WARN L170 areAnnotationChecker]: L9-1 has no Hoare annotation [2020-07-28 18:10:31,354 WARN L170 areAnnotationChecker]: L8-5 has no Hoare annotation [2020-07-28 18:10:31,354 INFO L163 areAnnotationChecker]: CFG has 0 edges. 0 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. 0 times interpolants missing. [2020-07-28 18:10:31,357 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.07 06:10:31 BoogieIcfgContainer [2020-07-28 18:10:31,359 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-28 18:10:31,360 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-07-28 18:10:31,360 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-07-28 18:10:31,360 INFO L275 PluginConnector]: Witness Printer initialized [2020-07-28 18:10:31,365 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.07 06:10:29" (3/4) ... [2020-07-28 18:10:31,367 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-07-28 18:10:31,429 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-07-28 18:10:31,429 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-07-28 18:10:31,433 INFO L168 Benchmark]: Toolchain (without parser) took 2223.97 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 133.7 MB). Free memory was 954.9 MB in the beginning and 976.1 MB in the end (delta: -21.2 MB). Peak memory consumption was 112.5 MB. Max. memory is 11.5 GB. [2020-07-28 18:10:31,433 INFO L168 Benchmark]: CDTParser took 0.34 ms. Allocated memory is still 1.0 GB. Free memory is still 981.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2020-07-28 18:10:31,434 INFO L168 Benchmark]: CACSL2BoogieTranslator took 234.31 ms. Allocated memory is still 1.0 GB. Free memory was 954.9 MB in the beginning and 944.1 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2020-07-28 18:10:31,435 INFO L168 Benchmark]: Boogie Procedure Inliner took 107.71 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 133.7 MB). Free memory was 944.1 MB in the beginning and 1.1 GB in the end (delta: -179.3 MB). Peak memory consumption was 9.6 MB. Max. memory is 11.5 GB. [2020-07-28 18:10:31,435 INFO L168 Benchmark]: Boogie Preprocessor took 40.30 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2020-07-28 18:10:31,436 INFO L168 Benchmark]: RCFGBuilder took 315.74 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: 17.8 MB). Peak memory consumption was 17.8 MB. Max. memory is 11.5 GB. [2020-07-28 18:10:31,437 INFO L168 Benchmark]: TraceAbstraction took 1448.80 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 976.1 MB in the end (delta: 129.6 MB). Peak memory consumption was 129.6 MB. Max. memory is 11.5 GB. [2020-07-28 18:10:31,437 INFO L168 Benchmark]: Witness Printer took 69.51 ms. Allocated memory is still 1.2 GB. Free memory is still 976.1 MB. There was no memory consumed. Max. memory is 11.5 GB. [2020-07-28 18:10:31,441 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - AssertionsEnabledResult: Assertions are enabled Assertions are enabled - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34 ms. Allocated memory is still 1.0 GB. Free memory is still 981.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 234.31 ms. Allocated memory is still 1.0 GB. Free memory was 954.9 MB in the beginning and 944.1 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 107.71 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 133.7 MB). Free memory was 944.1 MB in the beginning and 1.1 GB in the end (delta: -179.3 MB). Peak memory consumption was 9.6 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 40.30 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 315.74 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: 17.8 MB). Peak memory consumption was 17.8 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1448.80 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 976.1 MB in the end (delta: 129.6 MB). Peak memory consumption was 129.6 MB. Max. memory is 11.5 GB. * Witness Printer took 69.51 ms. Allocated memory is still 1.2 GB. Free memory is still 976.1 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 9]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L17] int i=0, x=0, y=0; [L18] int n=__VERIFIER_nondet_int(); [L19] COND FALSE !(!(n>0)) [L20] i=0 [L20] COND TRUE i