./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-crafted-lit/Urban-WST2013-Fig2-modified1000.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version f470102c Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_0383ce06-ecf1-47d4-ac98-ec25142f09a1/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_0383ce06-ecf1-47d4-ac98-ec25142f09a1/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_0383ce06-ecf1-47d4-ac98-ec25142f09a1/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_0383ce06-ecf1-47d4-ac98-ec25142f09a1/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-crafted-lit/Urban-WST2013-Fig2-modified1000.c -s /tmp/vcloud-vcloud-master/worker/run_dir_0383ce06-ecf1-47d4-ac98-ec25142f09a1/bin/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_0383ce06-ecf1-47d4-ac98-ec25142f09a1/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 2b2cc94eb5b8374a9980482fd0dfec59d6d2cf62 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-f470102 [2019-12-07 21:41:27,123 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 21:41:27,124 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 21:41:27,132 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 21:41:27,132 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 21:41:27,133 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 21:41:27,133 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 21:41:27,135 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 21:41:27,136 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 21:41:27,137 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 21:41:27,137 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 21:41:27,138 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 21:41:27,138 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 21:41:27,139 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 21:41:27,140 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 21:41:27,140 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 21:41:27,141 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 21:41:27,141 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 21:41:27,143 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 21:41:27,144 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 21:41:27,145 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 21:41:27,146 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 21:41:27,147 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 21:41:27,147 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 21:41:27,149 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 21:41:27,149 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 21:41:27,149 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 21:41:27,150 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 21:41:27,150 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 21:41:27,150 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 21:41:27,151 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 21:41:27,151 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 21:41:27,151 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 21:41:27,152 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 21:41:27,152 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 21:41:27,153 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 21:41:27,153 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 21:41:27,153 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 21:41:27,153 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 21:41:27,154 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 21:41:27,154 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 21:41:27,155 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_0383ce06-ecf1-47d4-ac98-ec25142f09a1/bin/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf [2019-12-07 21:41:27,165 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 21:41:27,165 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 21:41:27,165 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-12-07 21:41:27,165 INFO L138 SettingsManager]: * User list type=DISABLED [2019-12-07 21:41:27,166 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-12-07 21:41:27,166 INFO L138 SettingsManager]: * Explicit value domain=true [2019-12-07 21:41:27,166 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-12-07 21:41:27,166 INFO L138 SettingsManager]: * Octagon Domain=false [2019-12-07 21:41:27,166 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-12-07 21:41:27,166 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-12-07 21:41:27,166 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-12-07 21:41:27,166 INFO L138 SettingsManager]: * Interval Domain=false [2019-12-07 21:41:27,167 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-12-07 21:41:27,167 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-12-07 21:41:27,167 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-12-07 21:41:27,167 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 21:41:27,167 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-12-07 21:41:27,167 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 21:41:27,168 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 21:41:27,168 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-07 21:41:27,168 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 21:41:27,168 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-07 21:41:27,168 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2019-12-07 21:41:27,168 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 21:41:27,168 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 21:41:27,168 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-07 21:41:27,169 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 21:41:27,169 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 21:41:27,169 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 21:41:27,169 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 21:41:27,169 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 21:41:27,169 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 21:41:27,169 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-07 21:41:27,169 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-12-07 21:41:27,169 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-07 21:41:27,169 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-07 21:41:27,170 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 21:41:27,170 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-12-07 21:41:27,170 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_0383ce06-ecf1-47d4-ac98-ec25142f09a1/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 -> 2b2cc94eb5b8374a9980482fd0dfec59d6d2cf62 [2019-12-07 21:41:27,267 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 21:41:27,274 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 21:41:27,276 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 21:41:27,277 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 21:41:27,277 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 21:41:27,278 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_0383ce06-ecf1-47d4-ac98-ec25142f09a1/bin/utaipan/../../sv-benchmarks/c/termination-crafted-lit/Urban-WST2013-Fig2-modified1000.c [2019-12-07 21:41:27,315 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_0383ce06-ecf1-47d4-ac98-ec25142f09a1/bin/utaipan/data/95b4f6716/767a7b16453243e191f8a6886cd09037/FLAG5eb7a9775 [2019-12-07 21:41:27,631 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 21:41:27,631 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_0383ce06-ecf1-47d4-ac98-ec25142f09a1/sv-benchmarks/c/termination-crafted-lit/Urban-WST2013-Fig2-modified1000.c [2019-12-07 21:41:27,635 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_0383ce06-ecf1-47d4-ac98-ec25142f09a1/bin/utaipan/data/95b4f6716/767a7b16453243e191f8a6886cd09037/FLAG5eb7a9775 [2019-12-07 21:41:27,643 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_0383ce06-ecf1-47d4-ac98-ec25142f09a1/bin/utaipan/data/95b4f6716/767a7b16453243e191f8a6886cd09037 [2019-12-07 21:41:27,645 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 21:41:27,646 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 21:41:27,646 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 21:41:27,646 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 21:41:27,648 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 21:41:27,649 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 09:41:27" (1/1) ... [2019-12-07 21:41:27,651 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e573a4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:41:27, skipping insertion in model container [2019-12-07 21:41:27,651 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 09:41:27" (1/1) ... [2019-12-07 21:41:27,656 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 21:41:27,666 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 21:41:27,761 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 21:41:27,763 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 21:41:27,808 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 21:41:27,817 INFO L208 MainTranslator]: Completed translation [2019-12-07 21:41:27,818 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:41:27 WrapperNode [2019-12-07 21:41:27,818 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 21:41:27,818 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 21:41:27,818 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 21:41:27,818 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 21:41:27,824 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:41:27" (1/1) ... [2019-12-07 21:41:27,827 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:41:27" (1/1) ... [2019-12-07 21:41:27,839 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 21:41:27,839 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 21:41:27,839 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 21:41:27,839 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 21:41:27,845 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:41:27" (1/1) ... [2019-12-07 21:41:27,845 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:41:27" (1/1) ... [2019-12-07 21:41:27,846 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:41:27" (1/1) ... [2019-12-07 21:41:27,846 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:41:27" (1/1) ... [2019-12-07 21:41:27,847 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:41:27" (1/1) ... [2019-12-07 21:41:27,850 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:41:27" (1/1) ... [2019-12-07 21:41:27,851 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:41:27" (1/1) ... [2019-12-07 21:41:27,852 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 21:41:27,852 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 21:41:27,852 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 21:41:27,852 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 21:41:27,853 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:41:27" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0383ce06-ecf1-47d4-ac98-ec25142f09a1/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 [2019-12-07 21:41:27,893 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 21:41:27,894 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 21:41:28,001 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 21:41:28,001 INFO L287 CfgBuilder]: Removed 6 assume(true) statements. [2019-12-07 21:41:28,002 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 09:41:28 BoogieIcfgContainer [2019-12-07 21:41:28,002 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 21:41:28,003 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 21:41:28,003 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 21:41:28,005 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 21:41:28,005 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 09:41:27" (1/3) ... [2019-12-07 21:41:28,006 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62ed719 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 09:41:28, skipping insertion in model container [2019-12-07 21:41:28,006 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:41:27" (2/3) ... [2019-12-07 21:41:28,006 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62ed719 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 09:41:28, skipping insertion in model container [2019-12-07 21:41:28,006 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 09:41:28" (3/3) ... [2019-12-07 21:41:28,007 INFO L109 eAbstractionObserver]: Analyzing ICFG Urban-WST2013-Fig2-modified1000.c [2019-12-07 21:41:28,013 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 21:41:28,017 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2019-12-07 21:41:28,025 INFO L249 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2019-12-07 21:41:28,039 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 21:41:28,039 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-07 21:41:28,039 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 21:41:28,039 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 21:41:28,039 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 21:41:28,039 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 21:41:28,039 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 21:41:28,040 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 21:41:28,049 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2019-12-07 21:41:28,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-12-07 21:41:28,052 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 21:41:28,053 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-12-07 21:41:28,053 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-12-07 21:41:28,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 21:41:28,056 INFO L82 PathProgramCache]: Analyzing trace with hash 963531, now seen corresponding path program 1 times [2019-12-07 21:41:28,062 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 21:41:28,063 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088639101] [2019-12-07 21:41:28,063 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 21:41:28,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 21:41:28,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 21:41:28,152 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088639101] [2019-12-07 21:41:28,153 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 21:41:28,153 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-07 21:41:28,154 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489141110] [2019-12-07 21:41:28,157 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-07 21:41:28,157 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 21:41:28,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-07 21:41:28,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 21:41:28,167 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 3 states. [2019-12-07 21:41:28,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 21:41:28,189 INFO L93 Difference]: Finished difference Result 14 states and 15 transitions. [2019-12-07 21:41:28,189 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-07 21:41:28,190 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2019-12-07 21:41:28,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 21:41:28,196 INFO L225 Difference]: With dead ends: 14 [2019-12-07 21:41:28,196 INFO L226 Difference]: Without dead ends: 11 [2019-12-07 21:41:28,198 INFO L630 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 [2019-12-07 21:41:28,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2019-12-07 21:41:28,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 10. [2019-12-07 21:41:28,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2019-12-07 21:41:28,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2019-12-07 21:41:28,219 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 4 [2019-12-07 21:41:28,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 21:41:28,220 INFO L462 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2019-12-07 21:41:28,220 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-07 21:41:28,220 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2019-12-07 21:41:28,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-12-07 21:41:28,221 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 21:41:28,221 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-12-07 21:41:28,221 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-12-07 21:41:28,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 21:41:28,221 INFO L82 PathProgramCache]: Analyzing trace with hash 964251, now seen corresponding path program 1 times [2019-12-07 21:41:28,222 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 21:41:28,222 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474713340] [2019-12-07 21:41:28,222 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 21:41:28,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 21:41:28,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 21:41:28,238 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474713340] [2019-12-07 21:41:28,238 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 21:41:28,239 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-07 21:41:28,239 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96369599] [2019-12-07 21:41:28,240 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-07 21:41:28,240 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 21:41:28,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-07 21:41:28,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 21:41:28,241 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand 3 states. [2019-12-07 21:41:28,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 21:41:28,257 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2019-12-07 21:41:28,257 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-07 21:41:28,257 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2019-12-07 21:41:28,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 21:41:28,258 INFO L225 Difference]: With dead ends: 22 [2019-12-07 21:41:28,258 INFO L226 Difference]: Without dead ends: 13 [2019-12-07 21:41:28,258 INFO L630 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 [2019-12-07 21:41:28,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-12-07 21:41:28,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-12-07 21:41:28,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-12-07 21:41:28,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2019-12-07 21:41:28,261 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 4 [2019-12-07 21:41:28,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 21:41:28,261 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2019-12-07 21:41:28,261 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-07 21:41:28,261 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2019-12-07 21:41:28,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-12-07 21:41:28,262 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 21:41:28,262 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-12-07 21:41:28,262 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-12-07 21:41:28,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 21:41:28,262 INFO L82 PathProgramCache]: Analyzing trace with hash -1360165828, now seen corresponding path program 1 times [2019-12-07 21:41:28,262 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 21:41:28,263 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105616553] [2019-12-07 21:41:28,263 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 21:41:28,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 21:41:28,281 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 21:41:28,281 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105616553] [2019-12-07 21:41:28,282 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085216450] [2019-12-07 21:41:28,282 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0383ce06-ecf1-47d4-ac98-ec25142f09a1/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 21:41:28,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 21:41:28,302 INFO L264 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 2 conjunts are in the unsatisfiable core [2019-12-07 21:41:28,305 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 21:41:28,313 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 21:41:28,313 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 21:41:28,328 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 21:41:28,328 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-12-07 21:41:28,328 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [4] total 6 [2019-12-07 21:41:28,328 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742207835] [2019-12-07 21:41:28,329 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 21:41:28,329 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 21:41:28,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 21:41:28,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-12-07 21:41:28,329 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 4 states. [2019-12-07 21:41:28,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 21:41:28,340 INFO L93 Difference]: Finished difference Result 14 states and 15 transitions. [2019-12-07 21:41:28,341 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 21:41:28,341 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-12-07 21:41:28,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 21:41:28,342 INFO L225 Difference]: With dead ends: 14 [2019-12-07 21:41:28,342 INFO L226 Difference]: Without dead ends: 13 [2019-12-07 21:41:28,342 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-12-07 21:41:28,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-12-07 21:41:28,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2019-12-07 21:41:28,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-12-07 21:41:28,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2019-12-07 21:41:28,345 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 7 [2019-12-07 21:41:28,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 21:41:28,346 INFO L462 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2019-12-07 21:41:28,346 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 21:41:28,346 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2019-12-07 21:41:28,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-12-07 21:41:28,346 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 21:41:28,346 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1] [2019-12-07 21:41:28,547 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 21:41:28,547 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-12-07 21:41:28,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 21:41:28,548 INFO L82 PathProgramCache]: Analyzing trace with hash 784510025, now seen corresponding path program 1 times [2019-12-07 21:41:28,548 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 21:41:28,549 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448888281] [2019-12-07 21:41:28,549 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 21:41:28,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 21:41:28,580 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 21:41:28,581 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448888281] [2019-12-07 21:41:28,581 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 21:41:28,581 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-07 21:41:28,582 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173137247] [2019-12-07 21:41:28,582 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-07 21:41:28,582 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 21:41:28,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-07 21:41:28,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 21:41:28,583 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 3 states. [2019-12-07 21:41:28,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 21:41:28,596 INFO L93 Difference]: Finished difference Result 12 states and 13 transitions. [2019-12-07 21:41:28,596 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-07 21:41:28,596 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2019-12-07 21:41:28,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 21:41:28,597 INFO L225 Difference]: With dead ends: 12 [2019-12-07 21:41:28,597 INFO L226 Difference]: Without dead ends: 11 [2019-12-07 21:41:28,598 INFO L630 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 [2019-12-07 21:41:28,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2019-12-07 21:41:28,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 9. [2019-12-07 21:41:28,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2019-12-07 21:41:28,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2019-12-07 21:41:28,600 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 8 [2019-12-07 21:41:28,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 21:41:28,601 INFO L462 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2019-12-07 21:41:28,601 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-07 21:41:28,601 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2019-12-07 21:41:28,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-12-07 21:41:28,601 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 21:41:28,601 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 21:41:28,602 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-12-07 21:41:28,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 21:41:28,602 INFO L82 PathProgramCache]: Analyzing trace with hash 784532352, now seen corresponding path program 1 times [2019-12-07 21:41:28,602 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 21:41:28,602 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14248870] [2019-12-07 21:41:28,603 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 21:41:28,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 21:41:28,622 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 21:41:28,622 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14248870] [2019-12-07 21:41:28,622 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489915945] [2019-12-07 21:41:28,622 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0383ce06-ecf1-47d4-ac98-ec25142f09a1/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 21:41:28,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 21:41:28,638 INFO L264 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-07 21:41:28,639 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 21:41:28,646 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 21:41:28,646 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 21:41:28,654 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 21:41:28,654 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-12-07 21:41:28,654 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [4] total 6 [2019-12-07 21:41:28,654 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593023926] [2019-12-07 21:41:28,655 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 21:41:28,655 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 21:41:28,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 21:41:28,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-12-07 21:41:28,656 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 4 states. [2019-12-07 21:41:28,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 21:41:28,662 INFO L93 Difference]: Finished difference Result 9 states and 10 transitions. [2019-12-07 21:41:28,662 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-07 21:41:28,663 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2019-12-07 21:41:28,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 21:41:28,663 INFO L225 Difference]: With dead ends: 9 [2019-12-07 21:41:28,663 INFO L226 Difference]: Without dead ends: 0 [2019-12-07 21:41:28,663 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-12-07 21:41:28,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-12-07 21:41:28,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-12-07 21:41:28,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-12-07 21:41:28,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-12-07 21:41:28,664 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 8 [2019-12-07 21:41:28,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 21:41:28,664 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-12-07 21:41:28,664 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 21:41:28,664 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-12-07 21:41:28,664 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-12-07 21:41:28,865 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 21:41:28,867 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-12-07 21:41:28,904 INFO L246 CegarLoopResult]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 22) no Hoare annotation was computed. [2019-12-07 21:41:28,904 INFO L246 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-12-07 21:41:28,905 INFO L246 CegarLoopResult]: For program point ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW(line 24) no Hoare annotation was computed. [2019-12-07 21:41:28,905 INFO L242 CegarLoopResult]: At program point L21-2(lines 21 23) the Hoare annotation is: (and (<= ULTIMATE.start_main_~x1~0 10) (<= 0 (+ ULTIMATE.start_main_~x1~0 2147483648)) (<= ULTIMATE.start_main_~x2~0 1000)) [2019-12-07 21:41:28,905 INFO L246 CegarLoopResult]: For program point L21-3(lines 21 23) no Hoare annotation was computed. [2019-12-07 21:41:28,905 INFO L242 CegarLoopResult]: At program point L19-2(lines 19 25) the Hoare annotation is: (<= 0 (+ ULTIMATE.start_main_~x1~0 2147483648)) [2019-12-07 21:41:28,906 INFO L246 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 22) no Hoare annotation was computed. [2019-12-07 21:41:28,906 INFO L246 CegarLoopResult]: For program point ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW(line 24) no Hoare annotation was computed. [2019-12-07 21:41:28,906 INFO L246 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-12-07 21:41:28,907 INFO L246 CegarLoopResult]: For program point L24(line 24) no Hoare annotation was computed. [2019-12-07 21:41:28,907 INFO L246 CegarLoopResult]: For program point L22(line 22) no Hoare annotation was computed. [2019-12-07 21:41:28,907 INFO L246 CegarLoopResult]: For program point L22-1(line 22) no Hoare annotation was computed. [2019-12-07 21:41:28,924 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 09:41:28 BoogieIcfgContainer [2019-12-07 21:41:28,924 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-07 21:41:28,924 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 21:41:28,924 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 21:41:28,924 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 21:41:28,925 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 09:41:28" (3/4) ... [2019-12-07 21:41:28,927 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-12-07 21:41:28,935 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2019-12-07 21:41:28,935 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2019-12-07 21:41:28,935 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2019-12-07 21:41:28,969 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_0383ce06-ecf1-47d4-ac98-ec25142f09a1/bin/utaipan/witness.graphml [2019-12-07 21:41:28,969 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 21:41:28,971 INFO L168 Benchmark]: Toolchain (without parser) took 1324.56 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 105.9 MB). Free memory was 943.5 MB in the beginning and 1.0 GB in the end (delta: -72.7 MB). Peak memory consumption was 33.3 MB. Max. memory is 11.5 GB. [2019-12-07 21:41:28,971 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 1.0 GB. Free memory is still 958.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 21:41:28,972 INFO L168 Benchmark]: CACSL2BoogieTranslator took 171.68 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 105.9 MB). Free memory was 943.5 MB in the beginning and 1.1 GB in the end (delta: -156.2 MB). Peak memory consumption was 23.0 MB. Max. memory is 11.5 GB. [2019-12-07 21:41:28,972 INFO L168 Benchmark]: Boogie Procedure Inliner took 20.88 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 21:41:28,972 INFO L168 Benchmark]: Boogie Preprocessor took 12.67 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 21:41:28,973 INFO L168 Benchmark]: RCFGBuilder took 150.31 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 16.5 MB). Peak memory consumption was 16.5 MB. Max. memory is 11.5 GB. [2019-12-07 21:41:28,973 INFO L168 Benchmark]: TraceAbstraction took 921.05 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 61.7 MB). Peak memory consumption was 61.7 MB. Max. memory is 11.5 GB. [2019-12-07 21:41:28,974 INFO L168 Benchmark]: Witness Printer took 44.98 ms. Allocated memory is still 1.1 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2019-12-07 21:41:28,976 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 1.0 GB. Free memory is still 958.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 171.68 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 105.9 MB). Free memory was 943.5 MB in the beginning and 1.1 GB in the end (delta: -156.2 MB). Peak memory consumption was 23.0 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 20.88 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 12.67 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 150.31 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 16.5 MB). Peak memory consumption was 16.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 921.05 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 61.7 MB). Peak memory consumption was 61.7 MB. Max. memory is 11.5 GB. * Witness Printer took 44.98 ms. Allocated memory is still 1.1 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 24]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 22]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 24]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 22]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - AllSpecificationsHoldResult: All specifications hold 4 specifications checked. All of them hold - InvariantResult [Line: 19]: Loop Invariant Derived loop invariant: 0 <= x1 + 2147483648 - InvariantResult [Line: 21]: Loop Invariant Derived loop invariant: (x1 <= 10 && 0 <= x1 + 2147483648) && x2 <= 1000 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 4 error locations. Result: SAFE, OverallTime: 0.8s, OverallIterations: 5, TraceHistogramMax: 2, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 35 SDtfs, 13 SDslu, 8 SDs, 0 SdLazy, 31 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 41 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=13occurred 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, 5 MinimizatonAttempts, 4 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 2 LocationsWithAnnotation, 2 PreInvPairs, 5 NumberOfFragments, 17 HoareAnnotationTreeSize, 2 FomulaSimplifications, 19 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 2 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 46 NumberOfCodeBlocks, 46 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 52 ConstructedInterpolants, 0 QuantifiedInterpolants, 984 SizeOfPredicates, 1 NumberOfNonLiveVariables, 41 ConjunctsInSsa, 5 ConjunctsInUnsatCore, 9 InterpolantComputations, 7 PerfectInterpolantSequences, 7/9 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...