./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-crafted-lit/BrockschmidtCookFuhs-CAV2013-Introduction.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_7c615025-cee1-42f9-84d7-2fc4497b67b7/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_7c615025-cee1-42f9-84d7-2fc4497b67b7/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_7c615025-cee1-42f9-84d7-2fc4497b67b7/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_7c615025-cee1-42f9-84d7-2fc4497b67b7/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-crafted-lit/BrockschmidtCookFuhs-CAV2013-Introduction.c -s /tmp/vcloud-vcloud-master/worker/run_dir_7c615025-cee1-42f9-84d7-2fc4497b67b7/bin/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_7c615025-cee1-42f9-84d7-2fc4497b67b7/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 85017c4a5a64f245bd703090448e8d5785d54b75 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-03 12:32:37,059 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-03 12:32:37,062 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-03 12:32:37,163 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-03 12:32:37,164 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-03 12:32:37,170 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-03 12:32:37,174 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-03 12:32:37,180 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-03 12:32:37,183 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-03 12:32:37,193 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-03 12:32:37,194 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-03 12:32:37,198 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-03 12:32:37,198 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-03 12:32:37,201 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-03 12:32:37,203 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-03 12:32:37,204 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-03 12:32:37,206 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-03 12:32:37,207 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-03 12:32:37,209 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-03 12:32:37,212 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-03 12:32:37,215 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-03 12:32:37,224 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-03 12:32:37,226 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-03 12:32:37,227 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-03 12:32:37,231 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-03 12:32:37,232 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-03 12:32:37,233 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-03 12:32:37,234 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-03 12:32:37,235 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-03 12:32:37,236 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-03 12:32:37,237 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-03 12:32:37,238 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-03 12:32:37,239 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-03 12:32:37,240 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-03 12:32:37,242 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-03 12:32:37,242 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-03 12:32:37,244 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-03 12:32:37,244 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-03 12:32:37,245 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-03 12:32:37,246 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-03 12:32:37,247 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-03 12:32:37,249 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_7c615025-cee1-42f9-84d7-2fc4497b67b7/bin/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf [2020-12-03 12:32:37,281 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-03 12:32:37,282 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-03 12:32:37,283 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-03 12:32:37,283 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-03 12:32:37,288 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-03 12:32:37,289 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-03 12:32:37,289 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-03 12:32:37,289 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-03 12:32:37,290 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-03 12:32:37,290 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-03 12:32:37,291 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-03 12:32:37,291 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-03 12:32:37,292 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-03 12:32:37,292 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-03 12:32:37,293 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-03 12:32:37,294 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-03 12:32:37,294 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-03 12:32:37,295 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-03 12:32:37,295 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-03 12:32:37,296 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-03 12:32:37,296 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-03 12:32:37,297 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-03 12:32:37,297 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2020-12-03 12:32:37,297 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-03 12:32:37,298 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-03 12:32:37,298 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-03 12:32:37,299 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-03 12:32:37,299 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-03 12:32:37,300 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-03 12:32:37,300 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-03 12:32:37,301 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-03 12:32:37,301 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-03 12:32:37,302 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-03 12:32:37,302 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-03 12:32:37,303 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-03 12:32:37,303 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-03 12:32:37,303 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-03 12:32:37,307 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_7c615025-cee1-42f9-84d7-2fc4497b67b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_7c615025-cee1-42f9-84d7-2fc4497b67b7/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 85017c4a5a64f245bd703090448e8d5785d54b75 [2020-12-03 12:32:37,683 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-03 12:32:37,722 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-03 12:32:37,725 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-03 12:32:37,726 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-03 12:32:37,727 INFO L275 PluginConnector]: CDTParser initialized [2020-12-03 12:32:37,728 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_7c615025-cee1-42f9-84d7-2fc4497b67b7/bin/utaipan/../../sv-benchmarks/c/termination-crafted-lit/BrockschmidtCookFuhs-CAV2013-Introduction.c [2020-12-03 12:32:37,822 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_7c615025-cee1-42f9-84d7-2fc4497b67b7/bin/utaipan/data/806b1e97f/8a2b4db4c2224de58c36cffb34c49b12/FLAGba993481c [2020-12-03 12:32:38,247 INFO L306 CDTParser]: Found 1 translation units. [2020-12-03 12:32:38,248 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_7c615025-cee1-42f9-84d7-2fc4497b67b7/sv-benchmarks/c/termination-crafted-lit/BrockschmidtCookFuhs-CAV2013-Introduction.c [2020-12-03 12:32:38,259 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_7c615025-cee1-42f9-84d7-2fc4497b67b7/bin/utaipan/data/806b1e97f/8a2b4db4c2224de58c36cffb34c49b12/FLAGba993481c [2020-12-03 12:32:38,640 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_7c615025-cee1-42f9-84d7-2fc4497b67b7/bin/utaipan/data/806b1e97f/8a2b4db4c2224de58c36cffb34c49b12 [2020-12-03 12:32:38,642 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-03 12:32:38,644 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-03 12:32:38,660 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-03 12:32:38,661 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-03 12:32:38,664 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-03 12:32:38,665 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 12:32:38" (1/1) ... [2020-12-03 12:32:38,667 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b022241 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:32:38, skipping insertion in model container [2020-12-03 12:32:38,668 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 12:32:38" (1/1) ... [2020-12-03 12:32:38,675 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-03 12:32:38,687 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-03 12:32:38,833 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-03 12:32:38,837 INFO L203 MainTranslator]: Completed pre-run [2020-12-03 12:32:38,856 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-03 12:32:38,876 INFO L208 MainTranslator]: Completed translation [2020-12-03 12:32:38,877 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:32:38 WrapperNode [2020-12-03 12:32:38,878 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-03 12:32:38,879 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-03 12:32:38,879 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-03 12:32:38,879 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-03 12:32:38,888 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:32:38" (1/1) ... [2020-12-03 12:32:38,893 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:32:38" (1/1) ... [2020-12-03 12:32:38,914 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-03 12:32:38,915 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-03 12:32:38,916 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-03 12:32:38,916 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-03 12:32:38,926 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:32:38" (1/1) ... [2020-12-03 12:32:38,927 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:32:38" (1/1) ... [2020-12-03 12:32:38,928 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:32:38" (1/1) ... [2020-12-03 12:32:38,928 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:32:38" (1/1) ... [2020-12-03 12:32:38,932 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:32:38" (1/1) ... [2020-12-03 12:32:38,941 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:32:38" (1/1) ... [2020-12-03 12:32:38,942 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:32:38" (1/1) ... [2020-12-03 12:32:38,944 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-03 12:32:38,946 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-03 12:32:38,947 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-03 12:32:38,947 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-03 12:32:38,949 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:32:38" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7c615025-cee1-42f9-84d7-2fc4497b67b7/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 [2020-12-03 12:32:39,063 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-03 12:32:39,064 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-03 12:32:39,317 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-03 12:32:39,317 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2020-12-03 12:32:39,319 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 12:32:39 BoogieIcfgContainer [2020-12-03 12:32:39,319 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-03 12:32:39,321 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-03 12:32:39,321 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-03 12:32:39,325 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-03 12:32:39,325 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.12 12:32:38" (1/3) ... [2020-12-03 12:32:39,326 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b402456 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 12:32:39, skipping insertion in model container [2020-12-03 12:32:39,326 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:32:38" (2/3) ... [2020-12-03 12:32:39,327 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b402456 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 12:32:39, skipping insertion in model container [2020-12-03 12:32:39,327 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 12:32:39" (3/3) ... [2020-12-03 12:32:39,328 INFO L111 eAbstractionObserver]: Analyzing ICFG BrockschmidtCookFuhs-CAV2013-Introduction.c [2020-12-03 12:32:39,342 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-03 12:32:39,345 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2020-12-03 12:32:39,357 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-12-03 12:32:39,379 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-03 12:32:39,379 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-03 12:32:39,379 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-03 12:32:39,380 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-03 12:32:39,380 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-03 12:32:39,380 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-03 12:32:39,380 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-03 12:32:39,380 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-03 12:32:39,394 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2020-12-03 12:32:39,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-12-03 12:32:39,399 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:32:39,399 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-12-03 12:32:39,400 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-03 12:32:39,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:32:39,406 INFO L82 PathProgramCache]: Analyzing trace with hash 31073, now seen corresponding path program 1 times [2020-12-03 12:32:39,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:32:39,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373316955] [2020-12-03 12:32:39,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:32:39,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:32:39,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:32:39,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373316955] [2020-12-03 12:32:39,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 12:32:39,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-12-03 12:32:39,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644575678] [2020-12-03 12:32:39,565 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-03 12:32:39,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:32:39,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-03 12:32:39,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-03 12:32:39,583 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 3 states. [2020-12-03 12:32:39,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:32:39,635 INFO L93 Difference]: Finished difference Result 16 states and 17 transitions. [2020-12-03 12:32:39,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-03 12:32:39,637 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-12-03 12:32:39,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:32:39,646 INFO L225 Difference]: With dead ends: 16 [2020-12-03 12:32:39,647 INFO L226 Difference]: Without dead ends: 13 [2020-12-03 12:32:39,650 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-03 12:32:39,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-12-03 12:32:39,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2020-12-03 12:32:39,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-12-03 12:32:39,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2020-12-03 12:32:39,736 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 3 [2020-12-03 12:32:39,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:32:39,736 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2020-12-03 12:32:39,736 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-03 12:32:39,736 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2020-12-03 12:32:39,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-03 12:32:39,737 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:32:39,737 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-03 12:32:39,737 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-03 12:32:39,738 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-03 12:32:39,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:32:39,739 INFO L82 PathProgramCache]: Analyzing trace with hash 963307, now seen corresponding path program 1 times [2020-12-03 12:32:39,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:32:39,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261507713] [2020-12-03 12:32:39,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:32:39,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:32:39,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:32:39,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261507713] [2020-12-03 12:32:39,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 12:32:39,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-03 12:32:39,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770294081] [2020-12-03 12:32:39,786 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-03 12:32:39,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:32:39,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-03 12:32:39,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-03 12:32:39,804 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 4 states. [2020-12-03 12:32:39,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:32:39,865 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2020-12-03 12:32:39,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-03 12:32:39,866 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2020-12-03 12:32:39,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:32:39,867 INFO L225 Difference]: With dead ends: 17 [2020-12-03 12:32:39,867 INFO L226 Difference]: Without dead ends: 15 [2020-12-03 12:32:39,868 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 [2020-12-03 12:32:39,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-12-03 12:32:39,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2020-12-03 12:32:39,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-12-03 12:32:39,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-12-03 12:32:39,874 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 4 [2020-12-03 12:32:39,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:32:39,875 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-12-03 12:32:39,875 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-03 12:32:39,875 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-12-03 12:32:39,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-03 12:32:39,876 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:32:39,876 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-03 12:32:39,877 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-03 12:32:39,877 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-03 12:32:39,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:32:39,878 INFO L82 PathProgramCache]: Analyzing trace with hash 925739501, now seen corresponding path program 1 times [2020-12-03 12:32:39,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:32:39,879 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654659662] [2020-12-03 12:32:39,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:32:39,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:32:39,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:32:39,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654659662] [2020-12-03 12:32:39,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 12:32:39,913 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-12-03 12:32:39,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959664042] [2020-12-03 12:32:39,914 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-03 12:32:39,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:32:39,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-03 12:32:39,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-03 12:32:39,916 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 3 states. [2020-12-03 12:32:39,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:32:39,950 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2020-12-03 12:32:39,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-03 12:32:39,951 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-12-03 12:32:39,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:32:39,961 INFO L225 Difference]: With dead ends: 14 [2020-12-03 12:32:39,961 INFO L226 Difference]: Without dead ends: 13 [2020-12-03 12:32:39,962 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-03 12:32:39,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-12-03 12:32:39,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-12-03 12:32:39,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-12-03 12:32:39,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-12-03 12:32:39,966 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 6 [2020-12-03 12:32:39,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:32:39,967 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-12-03 12:32:39,967 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-03 12:32:39,967 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-12-03 12:32:39,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-03 12:32:39,968 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:32:39,968 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2020-12-03 12:32:39,968 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-03 12:32:39,969 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-03 12:32:39,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:32:39,970 INFO L82 PathProgramCache]: Analyzing trace with hash 577431471, now seen corresponding path program 1 times [2020-12-03 12:32:39,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:32:39,971 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083544217] [2020-12-03 12:32:39,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:32:39,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:32:40,068 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:32:40,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083544217] [2020-12-03 12:32:40,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55883744] [2020-12-03 12:32:40,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7c615025-cee1-42f9-84d7-2fc4497b67b7/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 [2020-12-03 12:32:40,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:32:40,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 19 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-03 12:32:40,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 12:32:40,309 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:32:40,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 12:32:40,366 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:32:40,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2020-12-03 12:32:40,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 9 [2020-12-03 12:32:40,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965680671] [2020-12-03 12:32:40,368 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-03 12:32:40,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:32:40,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-03 12:32:40,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2020-12-03 12:32:40,370 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 5 states. [2020-12-03 12:32:40,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:32:40,464 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2020-12-03 12:32:40,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-03 12:32:40,464 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-12-03 12:32:40,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:32:40,465 INFO L225 Difference]: With dead ends: 14 [2020-12-03 12:32:40,465 INFO L226 Difference]: Without dead ends: 13 [2020-12-03 12:32:40,466 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2020-12-03 12:32:40,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-12-03 12:32:40,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2020-12-03 12:32:40,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-12-03 12:32:40,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2020-12-03 12:32:40,470 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 8 [2020-12-03 12:32:40,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:32:40,471 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2020-12-03 12:32:40,471 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-03 12:32:40,471 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2020-12-03 12:32:40,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-03 12:32:40,472 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:32:40,472 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2020-12-03 12:32:40,693 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 12:32:40,694 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-03 12:32:40,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:32:40,695 INFO L82 PathProgramCache]: Analyzing trace with hash 720506461, now seen corresponding path program 1 times [2020-12-03 12:32:40,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:32:40,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987555353] [2020-12-03 12:32:40,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:32:40,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:32:40,746 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:32:40,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987555353] [2020-12-03 12:32:40,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171783288] [2020-12-03 12:32:40,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7c615025-cee1-42f9-84d7-2fc4497b67b7/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2020-12-03 12:32:40,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:32:40,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-03 12:32:40,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 12:32:40,845 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:32:40,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 12:32:40,924 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:32:40,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [557926597] [2020-12-03 12:32:40,959 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-12-03 12:32:40,959 INFO L166 IcfgInterpreter]: Building call graph [2020-12-03 12:32:40,965 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-03 12:32:40,972 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-03 12:32:40,973 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-03 12:32:41,312 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-03 12:32:41,589 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2020-12-03 12:32:41,589 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 3, 3] total 11 [2020-12-03 12:32:41,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015737844] [2020-12-03 12:32:41,593 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-03 12:32:41,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:32:41,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-03 12:32:41,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-12-03 12:32:41,603 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 6 states. [2020-12-03 12:32:41,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:32:41,772 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2020-12-03 12:32:41,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-03 12:32:41,773 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2020-12-03 12:32:41,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:32:41,776 INFO L225 Difference]: With dead ends: 12 [2020-12-03 12:32:41,776 INFO L226 Difference]: Without dead ends: 11 [2020-12-03 12:32:41,779 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2020-12-03 12:32:41,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2020-12-03 12:32:41,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2020-12-03 12:32:41,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-12-03 12:32:41,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2020-12-03 12:32:41,787 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2020-12-03 12:32:41,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:32:41,788 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2020-12-03 12:32:41,788 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-03 12:32:41,789 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2020-12-03 12:32:41,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-03 12:32:41,796 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:32:41,796 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1] [2020-12-03 12:32:42,016 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 12:32:42,017 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-03 12:32:42,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:32:42,017 INFO L82 PathProgramCache]: Analyzing trace with hash 860863857, now seen corresponding path program 1 times [2020-12-03 12:32:42,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:32:42,018 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275001459] [2020-12-03 12:32:42,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:32:42,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:32:42,065 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:32:42,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275001459] [2020-12-03 12:32:42,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893852324] [2020-12-03 12:32:42,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7c615025-cee1-42f9-84d7-2fc4497b67b7/bin/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 12:32:42,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:32:42,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-03 12:32:42,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 12:32:42,137 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:32:42,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 12:32:42,160 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:32:42,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1421478925] [2020-12-03 12:32:42,164 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-12-03 12:32:42,164 INFO L166 IcfgInterpreter]: Building call graph [2020-12-03 12:32:42,164 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-03 12:32:42,164 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-03 12:32:42,165 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-03 12:32:42,375 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-03 12:32:42,597 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-03 12:32:42,598 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-03 12:32:42,598 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 4 [2020-12-03 12:32:42,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275759555] [2020-12-03 12:32:42,598 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-03 12:32:42,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:32:42,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-03 12:32:42,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-12-03 12:32:42,600 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 6 states. [2020-12-03 12:32:42,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:32:42,658 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2020-12-03 12:32:42,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-03 12:32:42,659 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-12-03 12:32:42,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:32:42,661 INFO L225 Difference]: With dead ends: 27 [2020-12-03 12:32:42,661 INFO L226 Difference]: Without dead ends: 26 [2020-12-03 12:32:42,663 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-12-03 12:32:42,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-03 12:32:42,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-12-03 12:32:42,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-03 12:32:42,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2020-12-03 12:32:42,677 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 10 [2020-12-03 12:32:42,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:32:42,678 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2020-12-03 12:32:42,678 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-03 12:32:42,678 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2020-12-03 12:32:42,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-03 12:32:42,680 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:32:42,680 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 1, 1] [2020-12-03 12:32:42,896 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-03 12:32:42,897 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-03 12:32:42,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:32:42,897 INFO L82 PathProgramCache]: Analyzing trace with hash -333652957, now seen corresponding path program 2 times [2020-12-03 12:32:42,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:32:42,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781835778] [2020-12-03 12:32:42,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:32:42,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:32:42,987 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:32:42,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781835778] [2020-12-03 12:32:42,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549937974] [2020-12-03 12:32:42,988 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7c615025-cee1-42f9-84d7-2fc4497b67b7/bin/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 12:32:43,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-03 12:32:43,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-03 12:32:43,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-03 12:32:43,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 12:32:43,079 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:32:43,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 12:32:43,171 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:32:43,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [83136385] [2020-12-03 12:32:43,174 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-12-03 12:32:43,174 INFO L166 IcfgInterpreter]: Building call graph [2020-12-03 12:32:43,174 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-03 12:32:43,174 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-03 12:32:43,175 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-03 12:32:43,285 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-03 12:32:43,570 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-03 12:32:43,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-03 12:32:43,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2020-12-03 12:32:43,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929970669] [2020-12-03 12:32:43,574 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-03 12:32:43,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:32:43,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-03 12:32:43,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-12-03 12:32:43,576 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 12 states. [2020-12-03 12:32:43,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:32:43,666 INFO L93 Difference]: Finished difference Result 57 states and 62 transitions. [2020-12-03 12:32:43,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-03 12:32:43,667 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 25 [2020-12-03 12:32:43,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:32:43,670 INFO L225 Difference]: With dead ends: 57 [2020-12-03 12:32:43,670 INFO L226 Difference]: Without dead ends: 56 [2020-12-03 12:32:43,671 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 58 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-12-03 12:32:43,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-12-03 12:32:43,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-12-03 12:32:43,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-03 12:32:43,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2020-12-03 12:32:43,695 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 25 [2020-12-03 12:32:43,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:32:43,696 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2020-12-03 12:32:43,696 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-03 12:32:43,696 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2020-12-03 12:32:43,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-03 12:32:43,698 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:32:43,698 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 1, 1] [2020-12-03 12:32:43,924 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 12:32:43,924 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-03 12:32:43,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:32:43,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1266934173, now seen corresponding path program 3 times [2020-12-03 12:32:43,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:32:43,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019836662] [2020-12-03 12:32:43,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:32:43,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:32:44,155 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:32:44,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019836662] [2020-12-03 12:32:44,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112618112] [2020-12-03 12:32:44,157 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7c615025-cee1-42f9-84d7-2fc4497b67b7/bin/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 12:32:44,207 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-03 12:32:44,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-03 12:32:44,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-03 12:32:44,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 12:32:44,326 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:32:44,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 12:32:44,657 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:32:44,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1801614318] [2020-12-03 12:32:44,660 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-12-03 12:32:44,660 INFO L166 IcfgInterpreter]: Building call graph [2020-12-03 12:32:44,660 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-03 12:32:44,660 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-03 12:32:44,660 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-03 12:32:44,733 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-03 12:32:45,249 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-03 12:32:45,249 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-03 12:32:45,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2020-12-03 12:32:45,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543191052] [2020-12-03 12:32:45,250 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-03 12:32:45,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:32:45,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-03 12:32:45,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=522, Unknown=0, NotChecked=0, Total=812 [2020-12-03 12:32:45,252 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 24 states. [2020-12-03 12:32:45,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:32:45,509 INFO L93 Difference]: Finished difference Result 117 states and 128 transitions. [2020-12-03 12:32:45,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-03 12:32:45,509 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 55 [2020-12-03 12:32:45,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:32:45,516 INFO L225 Difference]: With dead ends: 117 [2020-12-03 12:32:45,516 INFO L226 Difference]: Without dead ends: 116 [2020-12-03 12:32:45,518 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 136 SyntacticMatches, 11 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=290, Invalid=522, Unknown=0, NotChecked=0, Total=812 [2020-12-03 12:32:45,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-12-03 12:32:45,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2020-12-03 12:32:45,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-12-03 12:32:45,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 116 transitions. [2020-12-03 12:32:45,542 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 116 transitions. Word has length 55 [2020-12-03 12:32:45,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:32:45,543 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 116 transitions. [2020-12-03 12:32:45,543 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-03 12:32:45,543 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 116 transitions. [2020-12-03 12:32:45,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-12-03 12:32:45,548 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:32:45,548 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 22, 22, 1, 1] [2020-12-03 12:32:45,764 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2020-12-03 12:32:45,764 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-03 12:32:45,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:32:45,765 INFO L82 PathProgramCache]: Analyzing trace with hash 1393971939, now seen corresponding path program 4 times [2020-12-03 12:32:45,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:32:45,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677322216] [2020-12-03 12:32:45,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:32:45,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:32:46,414 INFO L134 CoverageAnalysis]: Checked inductivity of 1243 backedges. 0 proven. 1243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:32:46,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677322216] [2020-12-03 12:32:46,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344986848] [2020-12-03 12:32:46,415 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7c615025-cee1-42f9-84d7-2fc4497b67b7/bin/utaipan/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 12:32:46,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:32:46,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-03 12:32:46,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 12:32:46,702 INFO L134 CoverageAnalysis]: Checked inductivity of 1243 backedges. 0 proven. 1243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:32:46,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 12:32:47,911 INFO L134 CoverageAnalysis]: Checked inductivity of 1243 backedges. 0 proven. 1243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:32:47,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1731668964] [2020-12-03 12:32:47,916 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-12-03 12:32:47,916 INFO L166 IcfgInterpreter]: Building call graph [2020-12-03 12:32:47,917 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-03 12:32:47,917 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-03 12:32:47,917 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-03 12:32:48,008 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-03 12:32:49,006 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-03 12:32:49,006 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-03 12:32:49,007 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 46 [2020-12-03 12:32:49,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300266484] [2020-12-03 12:32:49,008 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-12-03 12:32:49,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:32:49,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-12-03 12:32:49,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1142, Invalid=1614, Unknown=0, NotChecked=0, Total=2756 [2020-12-03 12:32:49,011 INFO L87 Difference]: Start difference. First operand 116 states and 116 transitions. Second operand 48 states. [2020-12-03 12:32:49,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:32:49,401 INFO L93 Difference]: Finished difference Result 237 states and 260 transitions. [2020-12-03 12:32:49,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-12-03 12:32:49,402 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 115 [2020-12-03 12:32:49,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:32:49,406 INFO L225 Difference]: With dead ends: 237 [2020-12-03 12:32:49,406 INFO L226 Difference]: Without dead ends: 236 [2020-12-03 12:32:49,408 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 292 SyntacticMatches, 23 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1922 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1142, Invalid=1614, Unknown=0, NotChecked=0, Total=2756 [2020-12-03 12:32:49,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-12-03 12:32:49,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 236. [2020-12-03 12:32:49,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2020-12-03 12:32:49,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 236 transitions. [2020-12-03 12:32:49,436 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 236 transitions. Word has length 115 [2020-12-03 12:32:49,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:32:49,437 INFO L481 AbstractCegarLoop]: Abstraction has 236 states and 236 transitions. [2020-12-03 12:32:49,437 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-12-03 12:32:49,437 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 236 transitions. [2020-12-03 12:32:49,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2020-12-03 12:32:49,440 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:32:49,441 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 47, 46, 46, 1, 1] [2020-12-03 12:32:49,665 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 12:32:49,666 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-03 12:32:49,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:32:49,666 INFO L82 PathProgramCache]: Analyzing trace with hash 1923709923, now seen corresponding path program 5 times [2020-12-03 12:32:49,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:32:49,667 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682162750] [2020-12-03 12:32:49,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:32:49,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:32:51,335 INFO L134 CoverageAnalysis]: Checked inductivity of 5359 backedges. 0 proven. 5359 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:32:51,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682162750] [2020-12-03 12:32:51,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357960830] [2020-12-03 12:32:51,335 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7c615025-cee1-42f9-84d7-2fc4497b67b7/bin/utaipan/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 12:32:51,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-03 12:32:51,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-03 12:32:51,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-03 12:32:51,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 12:32:51,911 INFO L134 CoverageAnalysis]: Checked inductivity of 5359 backedges. 737 proven. 21 refuted. 0 times theorem prover too weak. 4601 trivial. 0 not checked. [2020-12-03 12:32:51,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 12:32:52,566 INFO L134 CoverageAnalysis]: Checked inductivity of 5359 backedges. 737 proven. 21 refuted. 0 times theorem prover too weak. 4601 trivial. 0 not checked. [2020-12-03 12:32:52,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1704776668] [2020-12-03 12:32:52,573 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-12-03 12:32:52,573 INFO L166 IcfgInterpreter]: Building call graph [2020-12-03 12:32:52,575 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-03 12:32:52,575 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-03 12:32:52,575 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-03 12:32:52,667 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-03 12:32:56,503 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-03 12:32:56,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-03 12:32:56,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 8, 8] total 62 [2020-12-03 12:32:56,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215350419] [2020-12-03 12:32:56,504 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-12-03 12:32:56,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:32:56,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-12-03 12:32:56,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1557, Invalid=2999, Unknown=0, NotChecked=0, Total=4556 [2020-12-03 12:32:56,508 INFO L87 Difference]: Start difference. First operand 236 states and 236 transitions. Second operand 63 states. [2020-12-03 12:33:05,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:33:05,129 INFO L93 Difference]: Finished difference Result 243 states and 244 transitions. [2020-12-03 12:33:05,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2020-12-03 12:33:05,129 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 235 [2020-12-03 12:33:05,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:33:05,130 INFO L225 Difference]: With dead ends: 243 [2020-12-03 12:33:05,131 INFO L226 Difference]: Without dead ends: 0 [2020-12-03 12:33:05,145 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 894 GetRequests, 637 SyntacticMatches, 47 SemanticMatches, 210 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16599 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=12643, Invalid=32089, Unknown=0, NotChecked=0, Total=44732 [2020-12-03 12:33:05,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-03 12:33:05,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-03 12:33:05,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-03 12:33:05,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-03 12:33:05,145 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 235 [2020-12-03 12:33:05,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:33:05,146 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-03 12:33:05,146 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-12-03 12:33:05,146 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-03 12:33:05,146 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-03 12:33:05,348 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 12:33:05,350 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-12-03 12:33:05,755 WARN L197 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 24 [2020-12-03 12:33:05,757 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 19) no Hoare annotation was computed. [2020-12-03 12:33:05,757 INFO L262 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-12-03 12:33:05,758 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW(line 20) no Hoare annotation was computed. [2020-12-03 12:33:05,758 INFO L262 CegarLoopResult]: For program point L19(line 19) no Hoare annotation was computed. [2020-12-03 12:33:05,758 INFO L262 CegarLoopResult]: For program point L19-1(line 19) no Hoare annotation was computed. [2020-12-03 12:33:05,758 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 19) no Hoare annotation was computed. [2020-12-03 12:33:05,758 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW(line 20) no Hoare annotation was computed. [2020-12-03 12:33:05,758 INFO L262 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-12-03 12:33:05,758 INFO L262 CegarLoopResult]: For program point L20(line 20) no Hoare annotation was computed. [2020-12-03 12:33:05,759 INFO L262 CegarLoopResult]: For program point L20-1(line 20) no Hoare annotation was computed. [2020-12-03 12:33:05,759 INFO L258 CegarLoopResult]: At program point L18-2(lines 18 21) the Hoare annotation is: (or (and (<= ULTIMATE.start_main_~y~0 (+ (div (+ (* ULTIMATE.start_main_~x~0 (- 1)) 2147483648) 2) 1)) (<= 2 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~y~0 2147483646)) (and (<= 0 (+ ULTIMATE.start_main_~x~0 2147483648)) (<= (+ ULTIMATE.start_main_~x~0 ULTIMATE.start_main_~y~0) 2147483648) (= ULTIMATE.start_main_~y~0 1))) [2020-12-03 12:33:05,772 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.12 12:33:05 BoogieIcfgContainer [2020-12-03 12:33:05,773 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-03 12:33:05,773 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-03 12:33:05,773 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-03 12:33:05,774 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-03 12:33:05,774 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 12:32:39" (3/4) ... [2020-12-03 12:33:05,778 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-03 12:33:05,787 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2020-12-03 12:33:05,787 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2020-12-03 12:33:05,788 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-03 12:33:05,822 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_7c615025-cee1-42f9-84d7-2fc4497b67b7/bin/utaipan/witness.graphml [2020-12-03 12:33:05,822 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-03 12:33:05,823 INFO L168 Benchmark]: Toolchain (without parser) took 27178.27 ms. Allocated memory was 88.1 MB in the beginning and 272.6 MB in the end (delta: 184.5 MB). Free memory was 55.1 MB in the beginning and 125.0 MB in the end (delta: -69.9 MB). Peak memory consumption was 113.3 MB. Max. memory is 16.1 GB. [2020-12-03 12:33:05,824 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 88.1 MB. Free memory is still 53.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-03 12:33:05,824 INFO L168 Benchmark]: CACSL2BoogieTranslator took 217.86 ms. Allocated memory is still 88.1 MB. Free memory was 55.0 MB in the beginning and 66.5 MB in the end (delta: -11.6 MB). Peak memory consumption was 8.5 MB. Max. memory is 16.1 GB. [2020-12-03 12:33:05,825 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.29 ms. Allocated memory is still 88.1 MB. Free memory was 66.5 MB in the beginning and 65.3 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-03 12:33:05,825 INFO L168 Benchmark]: Boogie Preprocessor took 29.19 ms. Allocated memory is still 88.1 MB. Free memory was 65.3 MB in the beginning and 64.5 MB in the end (delta: 864.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-03 12:33:05,826 INFO L168 Benchmark]: RCFGBuilder took 373.59 ms. Allocated memory is still 88.1 MB. Free memory was 64.2 MB in the beginning and 54.1 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-12-03 12:33:05,826 INFO L168 Benchmark]: TraceAbstraction took 26451.71 ms. Allocated memory was 88.1 MB in the beginning and 272.6 MB in the end (delta: 184.5 MB). Free memory was 53.8 MB in the beginning and 127.1 MB in the end (delta: -73.3 MB). Peak memory consumption was 113.2 MB. Max. memory is 16.1 GB. [2020-12-03 12:33:05,827 INFO L168 Benchmark]: Witness Printer took 48.80 ms. Allocated memory is still 272.6 MB. Free memory was 127.1 MB in the beginning and 125.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-03 12:33:05,830 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 88.1 MB. Free memory is still 53.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 217.86 ms. Allocated memory is still 88.1 MB. Free memory was 55.0 MB in the beginning and 66.5 MB in the end (delta: -11.6 MB). Peak memory consumption was 8.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 35.29 ms. Allocated memory is still 88.1 MB. Free memory was 66.5 MB in the beginning and 65.3 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 29.19 ms. Allocated memory is still 88.1 MB. Free memory was 65.3 MB in the beginning and 64.5 MB in the end (delta: 864.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 373.59 ms. Allocated memory is still 88.1 MB. Free memory was 64.2 MB in the beginning and 54.1 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 26451.71 ms. Allocated memory was 88.1 MB in the beginning and 272.6 MB in the end (delta: 184.5 MB). Free memory was 53.8 MB in the beginning and 127.1 MB in the end (delta: -73.3 MB). Peak memory consumption was 113.2 MB. Max. memory is 16.1 GB. * Witness Printer took 48.80 ms. Allocated memory is still 272.6 MB. Free memory was 127.1 MB in the beginning and 125.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 20]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 19]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 20]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 19]: 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: 18]: Loop Invariant Derived loop invariant: ((y <= (x * -1 + 2147483648) / 2 + 1 && 2 <= y) && y <= 2147483646) || ((0 <= x + 2147483648 && x + y <= 2147483648) && y == 1) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 11 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 25.9s, OverallIterations: 10, TraceHistogramMax: 47, AutomataDifference: 9.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.4s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 28 SDtfs, 381 SDslu, 83 SDs, 0 SdLazy, 699 SolverSat, 219 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1596 GetRequests, 1164 SyntacticMatches, 91 SemanticMatches, 341 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19286 ImplicationChecksByTransitivity, 18.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=236occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 10 MinimizatonAttempts, 3 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 1 LocationsWithAnnotation, 1 PreInvPairs, 49 NumberOfFragments, 33 HoareAnnotationTreeSize, 1 FomulaSimplifications, 367 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 1 FomulaSimplificationsInter, 1884 FormulaSimplificationTreeSizeReductionInter, 0.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 6.0s InterpolantComputationTime, 927 NumberOfCodeBlocks, 717 NumberOfCodeBlocksAsserted, 26 NumberOfCheckSat, 1360 ConstructedInterpolants, 0 QuantifiedInterpolants, 455092 SizeOfPredicates, 4 NumberOfNonLiveVariables, 478 ConjunctsInSsa, 63 ConjunctsInUnsatCore, 24 InterpolantComputations, 4 PerfectInterpolantSequences, 10678/20766 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: OVERALL_TIME[ms]: 354, ICFG_INTERPRETER_ENTERED_PROCEDURES: 1, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 8, DAG_INTERPRETER_EARLY_EXITS: 0, TOOLS_POST_APPLICATIONS: 24, TOOLS_POST_TIME[ms]: 51, TOOLS_POST_CALL_APPLICATIONS: 0, TOOLS_POST_CALL_TIME[ms]: 0, TOOLS_POST_RETURN_APPLICATIONS: 0, TOOLS_POST_RETURN_TIME[ms]: 0, TOOLS_QUANTIFIERELIM_APPLICATIONS: 24, TOOLS_QUANTIFIERELIM_TIME[ms]: 42, TOOLS_QUANTIFIERELIM_MAX_TIME[ms]: 16, FLUID_QUERY_TIME[ms]: 4, FLUID_QUERIES: 39, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 3, DOMAIN_JOIN_TIME[ms]: 57, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME[ms]: 0, DOMAIN_WIDEN_APPLICATIONS: 2, DOMAIN_WIDEN_TIME[ms]: 171, DOMAIN_ISSUBSETEQ_APPLICATIONS: 3, DOMAIN_ISSUBSETEQ_TIME[ms]: 5, DOMAIN_ISBOTTOM_APPLICATIONS: 8, DOMAIN_ISBOTTOM_TIME[ms]: 8, LOOP_SUMMARIZER_APPLICATIONS: 1, LOOP_SUMMARIZER_CACHE_MISSES: 1, LOOP_SUMMARIZER_OVERALL_TIME[ms]: 220, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 219, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 3, CALL_SUMMARIZER_APPLICATIONS: 0, CALL_SUMMARIZER_CACHE_MISSES: 0, CALL_SUMMARIZER_OVERALL_TIME[ms]: 0, CALL_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 0, PROCEDURE_GRAPH_BUILDER_TIME[ms]: 3, PATH_EXPR_TIME[ms]: 6, REGEX_TO_DAG_TIME[ms]: 4, DAG_COMPRESSION_TIME[ms]: 10, DAG_COMPRESSION_PROCESSED_NODES: 75, DAG_COMPRESSION_RETAINED_NODES: 27, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...