./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-crafted-lit/PodelskiRybalchenko-TACAS2011-Fig3.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_ee813e26-ed36-4f55-a1cc-e8df6dd86526/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_ee813e26-ed36-4f55-a1cc-e8df6dd86526/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_ee813e26-ed36-4f55-a1cc-e8df6dd86526/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_ee813e26-ed36-4f55-a1cc-e8df6dd86526/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-crafted-lit/PodelskiRybalchenko-TACAS2011-Fig3.c -s /tmp/vcloud-vcloud-master/worker/run_dir_ee813e26-ed36-4f55-a1cc-e8df6dd86526/bin/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_ee813e26-ed36-4f55-a1cc-e8df6dd86526/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash c49ca63b076bdfdfd4da2b39429bac3c0da8332d .................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(OVERFLOW) --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-09 09:48:06,046 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 09:48:06,048 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 09:48:06,077 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 09:48:06,078 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 09:48:06,079 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 09:48:06,081 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 09:48:06,098 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 09:48:06,100 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 09:48:06,101 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 09:48:06,102 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 09:48:06,104 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 09:48:06,104 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 09:48:06,105 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 09:48:06,107 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 09:48:06,108 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 09:48:06,109 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 09:48:06,110 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 09:48:06,112 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 09:48:06,114 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 09:48:06,116 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 09:48:06,117 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 09:48:06,119 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 09:48:06,120 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 09:48:06,123 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 09:48:06,123 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 09:48:06,124 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 09:48:06,125 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 09:48:06,125 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 09:48:06,126 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 09:48:06,127 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 09:48:06,128 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 09:48:06,129 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 09:48:06,129 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 09:48:06,130 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 09:48:06,131 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 09:48:06,131 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 09:48:06,132 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 09:48:06,132 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 09:48:06,133 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 09:48:06,133 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 09:48:06,134 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_ee813e26-ed36-4f55-a1cc-e8df6dd86526/bin/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf [2020-12-09 09:48:06,159 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 09:48:06,159 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 09:48:06,160 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 09:48:06,160 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 09:48:06,160 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 09:48:06,160 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 09:48:06,160 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 09:48:06,161 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 09:48:06,161 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 09:48:06,161 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 09:48:06,161 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 09:48:06,161 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 09:48:06,162 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 09:48:06,162 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 09:48:06,162 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 09:48:06,163 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 09:48:06,163 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-09 09:48:06,163 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 09:48:06,163 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 09:48:06,163 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 09:48:06,164 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 09:48:06,164 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 09:48:06,164 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2020-12-09 09:48:06,164 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 09:48:06,164 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 09:48:06,165 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 09:48:06,165 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 09:48:06,165 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 09:48:06,165 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 09:48:06,165 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 09:48:06,166 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 09:48:06,166 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 09:48:06,166 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 09:48:06,166 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 09:48:06,166 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 09:48:06,167 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 09:48:06,167 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 09:48:06,167 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_ee813e26-ed36-4f55-a1cc-e8df6dd86526/bin/utaipan/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_ee813e26-ed36-4f55-a1cc-e8df6dd86526/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c49ca63b076bdfdfd4da2b39429bac3c0da8332d [2020-12-09 09:48:06,352 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 09:48:06,370 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 09:48:06,372 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 09:48:06,373 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 09:48:06,373 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 09:48:06,374 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_ee813e26-ed36-4f55-a1cc-e8df6dd86526/bin/utaipan/../../sv-benchmarks/c/termination-crafted-lit/PodelskiRybalchenko-TACAS2011-Fig3.c [2020-12-09 09:48:06,414 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_ee813e26-ed36-4f55-a1cc-e8df6dd86526/bin/utaipan/data/8a6d2bebe/29efb1b2cc804d418d4bdc5757b807f4/FLAG9bbd38453 [2020-12-09 09:48:06,776 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 09:48:06,777 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_ee813e26-ed36-4f55-a1cc-e8df6dd86526/sv-benchmarks/c/termination-crafted-lit/PodelskiRybalchenko-TACAS2011-Fig3.c [2020-12-09 09:48:06,781 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_ee813e26-ed36-4f55-a1cc-e8df6dd86526/bin/utaipan/data/8a6d2bebe/29efb1b2cc804d418d4bdc5757b807f4/FLAG9bbd38453 [2020-12-09 09:48:06,793 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_ee813e26-ed36-4f55-a1cc-e8df6dd86526/bin/utaipan/data/8a6d2bebe/29efb1b2cc804d418d4bdc5757b807f4 [2020-12-09 09:48:06,796 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 09:48:06,797 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 09:48:06,799 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 09:48:06,799 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 09:48:06,801 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 09:48:06,801 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 09:48:06" (1/1) ... [2020-12-09 09:48:06,803 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53d84f2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:48:06, skipping insertion in model container [2020-12-09 09:48:06,803 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 09:48:06" (1/1) ... [2020-12-09 09:48:06,808 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 09:48:06,822 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 09:48:06,916 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 09:48:06,919 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 09:48:06,933 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 09:48:06,941 INFO L208 MainTranslator]: Completed translation [2020-12-09 09:48:06,942 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:48:06 WrapperNode [2020-12-09 09:48:06,942 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 09:48:06,943 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 09:48:06,943 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 09:48:06,943 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 09:48:06,948 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:48:06" (1/1) ... [2020-12-09 09:48:06,951 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:48:06" (1/1) ... [2020-12-09 09:48:06,965 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 09:48:06,965 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 09:48:06,966 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 09:48:06,966 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 09:48:06,973 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:48:06" (1/1) ... [2020-12-09 09:48:06,974 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:48:06" (1/1) ... [2020-12-09 09:48:06,974 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:48:06" (1/1) ... [2020-12-09 09:48:06,975 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:48:06" (1/1) ... [2020-12-09 09:48:06,976 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:48:06" (1/1) ... [2020-12-09 09:48:06,980 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:48:06" (1/1) ... [2020-12-09 09:48:06,980 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:48:06" (1/1) ... [2020-12-09 09:48:06,982 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 09:48:06,983 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 09:48:06,983 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 09:48:06,983 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 09:48:06,984 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:48:06" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ee813e26-ed36-4f55-a1cc-e8df6dd86526/bin/utaipan/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 [2020-12-09 09:48:07,048 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 09:48:07,048 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 09:48:07,199 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 09:48:07,199 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2020-12-09 09:48:07,201 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 09:48:07 BoogieIcfgContainer [2020-12-09 09:48:07,201 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 09:48:07,203 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 09:48:07,203 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 09:48:07,206 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 09:48:07,206 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 09:48:06" (1/3) ... [2020-12-09 09:48:07,207 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f63a646 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 09:48:07, skipping insertion in model container [2020-12-09 09:48:07,207 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:48:06" (2/3) ... [2020-12-09 09:48:07,208 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f63a646 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 09:48:07, skipping insertion in model container [2020-12-09 09:48:07,208 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 09:48:07" (3/3) ... [2020-12-09 09:48:07,209 INFO L111 eAbstractionObserver]: Analyzing ICFG PodelskiRybalchenko-TACAS2011-Fig3.c [2020-12-09 09:48:07,222 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 09:48:07,225 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2020-12-09 09:48:07,233 INFO L253 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2020-12-09 09:48:07,251 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 09:48:07,251 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 09:48:07,252 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 09:48:07,252 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 09:48:07,252 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 09:48:07,252 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 09:48:07,252 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 09:48:07,252 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 09:48:07,262 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2020-12-09 09:48:07,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-09 09:48:07,266 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:48:07,266 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-09 09:48:07,267 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-09 09:48:07,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:48:07,272 INFO L82 PathProgramCache]: Analyzing trace with hash 963531, now seen corresponding path program 1 times [2020-12-09 09:48:07,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 09:48:07,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360924510] [2020-12-09 09:48:07,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 09:48:07,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:48:07,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:48:07,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360924510] [2020-12-09 09:48:07,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 09:48:07,393 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 09:48:07,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494794183] [2020-12-09 09:48:07,397 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 09:48:07,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 09:48:07,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 09:48:07,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 09:48:07,408 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 4 states. [2020-12-09 09:48:07,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 09:48:07,454 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2020-12-09 09:48:07,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 09:48:07,456 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2020-12-09 09:48:07,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 09:48:07,462 INFO L225 Difference]: With dead ends: 33 [2020-12-09 09:48:07,462 INFO L226 Difference]: Without dead ends: 29 [2020-12-09 09:48:07,464 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 09:48:07,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-09 09:48:07,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 18. [2020-12-09 09:48:07,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-09 09:48:07,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2020-12-09 09:48:07,489 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 4 [2020-12-09 09:48:07,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 09:48:07,490 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2020-12-09 09:48:07,490 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 09:48:07,490 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2020-12-09 09:48:07,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-09 09:48:07,490 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:48:07,490 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-09 09:48:07,491 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 09:48:07,491 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-09 09:48:07,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:48:07,492 INFO L82 PathProgramCache]: Analyzing trace with hash 963339, now seen corresponding path program 1 times [2020-12-09 09:48:07,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 09:48:07,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921679141] [2020-12-09 09:48:07,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 09:48:07,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:48:07,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:48:07,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921679141] [2020-12-09 09:48:07,514 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 09:48:07,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 09:48:07,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56411539] [2020-12-09 09:48:07,516 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 09:48:07,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 09:48:07,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 09:48:07,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 09:48:07,517 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 4 states. [2020-12-09 09:48:07,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 09:48:07,561 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2020-12-09 09:48:07,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 09:48:07,562 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2020-12-09 09:48:07,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 09:48:07,563 INFO L225 Difference]: With dead ends: 31 [2020-12-09 09:48:07,563 INFO L226 Difference]: Without dead ends: 30 [2020-12-09 09:48:07,564 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 09:48:07,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-09 09:48:07,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 22. [2020-12-09 09:48:07,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-09 09:48:07,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2020-12-09 09:48:07,569 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 4 [2020-12-09 09:48:07,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 09:48:07,569 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2020-12-09 09:48:07,570 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 09:48:07,570 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2020-12-09 09:48:07,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-09 09:48:07,570 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:48:07,570 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-09 09:48:07,570 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-09 09:48:07,571 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-09 09:48:07,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:48:07,572 INFO L82 PathProgramCache]: Analyzing trace with hash 29869514, now seen corresponding path program 1 times [2020-12-09 09:48:07,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 09:48:07,572 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265060623] [2020-12-09 09:48:07,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 09:48:07,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:48:07,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:48:07,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265060623] [2020-12-09 09:48:07,598 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 09:48:07,599 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 09:48:07,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749534019] [2020-12-09 09:48:07,599 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 09:48:07,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 09:48:07,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 09:48:07,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 09:48:07,601 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 3 states. [2020-12-09 09:48:07,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 09:48:07,616 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2020-12-09 09:48:07,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 09:48:07,617 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2020-12-09 09:48:07,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 09:48:07,618 INFO L225 Difference]: With dead ends: 22 [2020-12-09 09:48:07,618 INFO L226 Difference]: Without dead ends: 21 [2020-12-09 09:48:07,619 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 09:48:07,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-12-09 09:48:07,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-12-09 09:48:07,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-09 09:48:07,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-12-09 09:48:07,624 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 5 [2020-12-09 09:48:07,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 09:48:07,624 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-12-09 09:48:07,624 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 09:48:07,624 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-12-09 09:48:07,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-09 09:48:07,625 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:48:07,625 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-09 09:48:07,625 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-09 09:48:07,625 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-09 09:48:07,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:48:07,626 INFO L82 PathProgramCache]: Analyzing trace with hash 29863556, now seen corresponding path program 1 times [2020-12-09 09:48:07,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 09:48:07,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534137757] [2020-12-09 09:48:07,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 09:48:07,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:48:07,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:48:07,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534137757] [2020-12-09 09:48:07,648 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 09:48:07,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 09:48:07,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855602083] [2020-12-09 09:48:07,648 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 09:48:07,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 09:48:07,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 09:48:07,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 09:48:07,650 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 3 states. [2020-12-09 09:48:07,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 09:48:07,665 INFO L93 Difference]: Finished difference Result 21 states and 25 transitions. [2020-12-09 09:48:07,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 09:48:07,666 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2020-12-09 09:48:07,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 09:48:07,666 INFO L225 Difference]: With dead ends: 21 [2020-12-09 09:48:07,666 INFO L226 Difference]: Without dead ends: 19 [2020-12-09 09:48:07,667 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 09:48:07,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-12-09 09:48:07,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-12-09 09:48:07,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-09 09:48:07,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2020-12-09 09:48:07,671 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 5 [2020-12-09 09:48:07,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 09:48:07,671 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2020-12-09 09:48:07,671 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 09:48:07,671 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2020-12-09 09:48:07,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-09 09:48:07,672 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:48:07,672 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-09 09:48:07,672 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-09 09:48:07,672 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-09 09:48:07,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:48:07,673 INFO L82 PathProgramCache]: Analyzing trace with hash 925954989, now seen corresponding path program 1 times [2020-12-09 09:48:07,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 09:48:07,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522251508] [2020-12-09 09:48:07,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 09:48:07,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 09:48:07,686 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 09:48:07,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 09:48:07,695 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 09:48:07,709 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-12-09 09:48:07,709 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 09:48:07,709 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-09 09:48:07,723 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 09:48:07 BoogieIcfgContainer [2020-12-09 09:48:07,723 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 09:48:07,724 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 09:48:07,725 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 09:48:07,725 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 09:48:07,725 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 09:48:07" (3/4) ... [2020-12-09 09:48:07,727 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-09 09:48:07,754 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_ee813e26-ed36-4f55-a1cc-e8df6dd86526/bin/utaipan/witness.graphml [2020-12-09 09:48:07,754 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 09:48:07,755 INFO L168 Benchmark]: Toolchain (without parser) took 957.26 ms. Allocated memory is still 119.5 MB. Free memory was 69.0 MB in the beginning and 87.3 MB in the end (delta: -18.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 09:48:07,755 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 119.5 MB. Free memory is still 84.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 09:48:07,756 INFO L168 Benchmark]: CACSL2BoogieTranslator took 143.44 ms. Allocated memory is still 119.5 MB. Free memory was 68.7 MB in the beginning and 98.1 MB in the end (delta: -29.3 MB). Peak memory consumption was 6.5 MB. Max. memory is 16.1 GB. [2020-12-09 09:48:07,756 INFO L168 Benchmark]: Boogie Procedure Inliner took 22.17 ms. Allocated memory is still 119.5 MB. Free memory was 98.1 MB in the beginning and 96.7 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 09:48:07,756 INFO L168 Benchmark]: Boogie Preprocessor took 16.49 ms. Allocated memory is still 119.5 MB. Free memory was 96.7 MB in the beginning and 95.7 MB in the end (delta: 987.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 09:48:07,757 INFO L168 Benchmark]: RCFGBuilder took 218.71 ms. Allocated memory is still 119.5 MB. Free memory was 95.7 MB in the beginning and 84.5 MB in the end (delta: 11.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-12-09 09:48:07,757 INFO L168 Benchmark]: TraceAbstraction took 520.57 ms. Allocated memory is still 119.5 MB. Free memory was 84.1 MB in the beginning and 89.4 MB in the end (delta: -5.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 09:48:07,758 INFO L168 Benchmark]: Witness Printer took 29.23 ms. Allocated memory is still 119.5 MB. Free memory was 88.8 MB in the beginning and 87.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 09:48:07,760 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 119.5 MB. Free memory is still 84.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 143.44 ms. Allocated memory is still 119.5 MB. Free memory was 68.7 MB in the beginning and 98.1 MB in the end (delta: -29.3 MB). Peak memory consumption was 6.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 22.17 ms. Allocated memory is still 119.5 MB. Free memory was 98.1 MB in the beginning and 96.7 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 16.49 ms. Allocated memory is still 119.5 MB. Free memory was 96.7 MB in the beginning and 95.7 MB in the end (delta: 987.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 218.71 ms. Allocated memory is still 119.5 MB. Free memory was 95.7 MB in the beginning and 84.5 MB in the end (delta: 11.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 520.57 ms. Allocated memory is still 119.5 MB. Free memory was 84.1 MB in the beginning and 89.4 MB in the end (delta: -5.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 29.23 ms. Allocated memory is still 119.5 MB. Free memory was 88.8 MB in the beginning and 87.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 22]: integer overflow possible integer overflow possible We found a FailurePath: [L12] int x = __VERIFIER_nondet_int(); [L13] int y = __VERIFIER_nondet_int(); [L14] COND TRUE x > 0 && y > 0 [L15] int old_x = x; [L16] int old_y = y; [L17] COND FALSE !(__VERIFIER_nondet_int()) [L21] EXPR old_y - 2 [L21] x = old_y - 2 [L22] old_x + 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 16 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.4s, OverallIterations: 5, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 43 SDtfs, 65 SDslu, 36 SDs, 0 SdLazy, 48 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22occurred in iteration=2, 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, 4 MinimizatonAttempts, 19 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 24 NumberOfCodeBlocks, 24 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 14 ConstructedInterpolants, 0 QuantifiedInterpolants, 134 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...