./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-crafted-lit/HeizmannHoenickeLeikePodelski-ATVA2013-Fig1.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881d4712-bae5-4d56-8b47-ea5794eef965/bin/utaipan-WLngWcDbfI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881d4712-bae5-4d56-8b47-ea5794eef965/bin/utaipan-WLngWcDbfI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881d4712-bae5-4d56-8b47-ea5794eef965/bin/utaipan-WLngWcDbfI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881d4712-bae5-4d56-8b47-ea5794eef965/bin/utaipan-WLngWcDbfI/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-crafted-lit/HeizmannHoenickeLeikePodelski-ATVA2013-Fig1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881d4712-bae5-4d56-8b47-ea5794eef965/bin/utaipan-WLngWcDbfI/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881d4712-bae5-4d56-8b47-ea5794eef965/bin/utaipan-WLngWcDbfI --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 0564e568992a96ba006237c1af458e049de52506 ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2021-10-11 02:32:47,169 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 02:32:47,171 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 02:32:47,202 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 02:32:47,203 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 02:32:47,204 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 02:32:47,206 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 02:32:47,208 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 02:32:47,211 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 02:32:47,212 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 02:32:47,213 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 02:32:47,214 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 02:32:47,215 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 02:32:47,216 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 02:32:47,217 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 02:32:47,219 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 02:32:47,220 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 02:32:47,221 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 02:32:47,223 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 02:32:47,226 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 02:32:47,228 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 02:32:47,230 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 02:32:47,231 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 02:32:47,232 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 02:32:47,235 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 02:32:47,236 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 02:32:47,236 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 02:32:47,237 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 02:32:47,238 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 02:32:47,239 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 02:32:47,240 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 02:32:47,241 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 02:32:47,241 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 02:32:47,242 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 02:32:47,244 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 02:32:47,244 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 02:32:47,245 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 02:32:47,245 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 02:32:47,246 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 02:32:47,247 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 02:32:47,248 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 02:32:47,249 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881d4712-bae5-4d56-8b47-ea5794eef965/bin/utaipan-WLngWcDbfI/config/svcomp-Overflow-64bit-Taipan_Default.epf [2021-10-11 02:32:47,272 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 02:32:47,273 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 02:32:47,274 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-11 02:32:47,274 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-11 02:32:47,274 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-11 02:32:47,275 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-11 02:32:47,275 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-11 02:32:47,276 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-11 02:32:47,276 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-11 02:32:47,276 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-11 02:32:47,277 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-11 02:32:47,277 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-11 02:32:47,278 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-11 02:32:47,278 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-11 02:32:47,278 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-11 02:32:47,279 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 02:32:47,280 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-11 02:32:47,280 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-11 02:32:47,280 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 02:32:47,281 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-11 02:32:47,281 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 02:32:47,281 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-11 02:32:47,282 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2021-10-11 02:32:47,282 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-11 02:32:47,283 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 02:32:47,283 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-11 02:32:47,283 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 02:32:47,284 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 02:32:47,284 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:32:47,285 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 02:32:47,285 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 02:32:47,285 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-11 02:32:47,286 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-11 02:32:47,286 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-11 02:32:47,286 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-11 02:32:47,286 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 02:32:47,287 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-11 02:32:47,287 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_worker_vcloud-master_on_vcloud-master/run_dir_881d4712-bae5-4d56-8b47-ea5794eef965/bin/utaipan-WLngWcDbfI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881d4712-bae5-4d56-8b47-ea5794eef965/bin/utaipan-WLngWcDbfI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0564e568992a96ba006237c1af458e049de52506 [2021-10-11 02:32:47,540 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 02:32:47,589 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 02:32:47,591 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 02:32:47,593 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 02:32:47,594 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 02:32:47,595 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881d4712-bae5-4d56-8b47-ea5794eef965/bin/utaipan-WLngWcDbfI/../../sv-benchmarks/c/termination-crafted-lit/HeizmannHoenickeLeikePodelski-ATVA2013-Fig1.c [2021-10-11 02:32:47,663 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881d4712-bae5-4d56-8b47-ea5794eef965/bin/utaipan-WLngWcDbfI/data/7eee6fdfc/29e5307473b44184af2e301297c0dfd0/FLAG1b1031056 [2021-10-11 02:32:48,112 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 02:32:48,112 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881d4712-bae5-4d56-8b47-ea5794eef965/sv-benchmarks/c/termination-crafted-lit/HeizmannHoenickeLeikePodelski-ATVA2013-Fig1.c [2021-10-11 02:32:48,118 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881d4712-bae5-4d56-8b47-ea5794eef965/bin/utaipan-WLngWcDbfI/data/7eee6fdfc/29e5307473b44184af2e301297c0dfd0/FLAG1b1031056 [2021-10-11 02:32:48,529 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881d4712-bae5-4d56-8b47-ea5794eef965/bin/utaipan-WLngWcDbfI/data/7eee6fdfc/29e5307473b44184af2e301297c0dfd0 [2021-10-11 02:32:48,533 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 02:32:48,535 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 02:32:48,543 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 02:32:48,543 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 02:32:48,546 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 02:32:48,546 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:32:48" (1/1) ... [2021-10-11 02:32:48,547 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ca98fe9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:48, skipping insertion in model container [2021-10-11 02:32:48,547 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:32:48" (1/1) ... [2021-10-11 02:32:48,554 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 02:32:48,572 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 02:32:48,743 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:32:48,746 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 02:32:48,759 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:32:48,769 INFO L208 MainTranslator]: Completed translation [2021-10-11 02:32:48,770 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:48 WrapperNode [2021-10-11 02:32:48,770 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 02:32:48,772 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 02:32:48,772 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 02:32:48,772 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 02:32:48,780 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:48" (1/1) ... [2021-10-11 02:32:48,784 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:48" (1/1) ... [2021-10-11 02:32:48,804 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 02:32:48,805 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 02:32:48,805 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 02:32:48,805 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 02:32:48,813 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:48" (1/1) ... [2021-10-11 02:32:48,814 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:48" (1/1) ... [2021-10-11 02:32:48,814 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:48" (1/1) ... [2021-10-11 02:32:48,815 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:48" (1/1) ... [2021-10-11 02:32:48,818 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:48" (1/1) ... [2021-10-11 02:32:48,829 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:48" (1/1) ... [2021-10-11 02:32:48,831 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:48" (1/1) ... [2021-10-11 02:32:48,832 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 02:32:48,833 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 02:32:48,833 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 02:32:48,833 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 02:32:48,834 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:48" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881d4712-bae5-4d56-8b47-ea5794eef965/bin/utaipan-WLngWcDbfI/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 [2021-10-11 02:32:48,909 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 02:32:48,909 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 02:32:49,067 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 02:32:49,068 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2021-10-11 02:32:49,070 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:32:49 BoogieIcfgContainer [2021-10-11 02:32:49,070 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 02:32:49,073 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 02:32:49,073 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 02:32:49,077 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 02:32:49,077 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:32:48" (1/3) ... [2021-10-11 02:32:49,084 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@224a6a32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:32:49, skipping insertion in model container [2021-10-11 02:32:49,084 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:48" (2/3) ... [2021-10-11 02:32:49,085 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@224a6a32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:32:49, skipping insertion in model container [2021-10-11 02:32:49,085 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:32:49" (3/3) ... [2021-10-11 02:32:49,087 INFO L111 eAbstractionObserver]: Analyzing ICFG HeizmannHoenickeLeikePodelski-ATVA2013-Fig1.c [2021-10-11 02:32:49,101 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 02:32:49,104 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2021-10-11 02:32:49,116 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-10-11 02:32:49,140 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 02:32:49,141 INFO L378 AbstractCegarLoop]: Hoare is true [2021-10-11 02:32:49,141 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 02:32:49,141 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 02:32:49,141 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 02:32:49,141 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 02:32:49,142 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 02:32:49,142 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 02:32:49,155 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2021-10-11 02:32:49,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-11 02:32:49,160 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:32:49,161 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-11 02:32:49,161 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2021-10-11 02:32:49,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:32:49,167 INFO L82 PathProgramCache]: Analyzing trace with hash 31073, now seen corresponding path program 1 times [2021-10-11 02:32:49,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:32:49,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063913821] [2021-10-11 02:32:49,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:32:49,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:32:49,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:32:49,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063913821] [2021-10-11 02:32:49,308 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:32:49,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-11 02:32:49,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081157015] [2021-10-11 02:32:49,313 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:32:49,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:32:49,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:32:49,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:32:49,328 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 3 states. [2021-10-11 02:32:49,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:32:49,438 INFO L93 Difference]: Finished difference Result 16 states and 17 transitions. [2021-10-11 02:32:49,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:32:49,440 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2021-10-11 02:32:49,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:32:49,447 INFO L225 Difference]: With dead ends: 16 [2021-10-11 02:32:49,448 INFO L226 Difference]: Without dead ends: 13 [2021-10-11 02:32:49,450 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 [2021-10-11 02:32:49,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-10-11 02:32:49,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2021-10-11 02:32:49,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-10-11 02:32:49,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2021-10-11 02:32:49,499 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 3 [2021-10-11 02:32:49,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:32:49,499 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2021-10-11 02:32:49,499 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:32:49,499 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2021-10-11 02:32:49,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-11 02:32:49,500 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:32:49,500 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-11 02:32:49,500 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-11 02:32:49,500 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2021-10-11 02:32:49,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:32:49,501 INFO L82 PathProgramCache]: Analyzing trace with hash 963307, now seen corresponding path program 1 times [2021-10-11 02:32:49,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:32:49,502 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708793752] [2021-10-11 02:32:49,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:32:49,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:32:49,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:32:49,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708793752] [2021-10-11 02:32:49,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:32:49,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:32:49,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844525542] [2021-10-11 02:32:49,535 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:32:49,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:32:49,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:32:49,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:32:49,537 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 4 states. [2021-10-11 02:32:49,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:32:49,591 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2021-10-11 02:32:49,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-11 02:32:49,591 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2021-10-11 02:32:49,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:32:49,592 INFO L225 Difference]: With dead ends: 17 [2021-10-11 02:32:49,592 INFO L226 Difference]: Without dead ends: 15 [2021-10-11 02:32:49,593 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 [2021-10-11 02:32:49,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-10-11 02:32:49,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2021-10-11 02:32:49,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-10-11 02:32:49,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2021-10-11 02:32:49,604 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 4 [2021-10-11 02:32:49,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:32:49,605 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2021-10-11 02:32:49,605 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:32:49,606 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2021-10-11 02:32:49,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-11 02:32:49,608 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:32:49,608 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-11 02:32:49,608 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-11 02:32:49,609 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2021-10-11 02:32:49,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:32:49,611 INFO L82 PathProgramCache]: Analyzing trace with hash 925739501, now seen corresponding path program 1 times [2021-10-11 02:32:49,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:32:49,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463069501] [2021-10-11 02:32:49,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:32:49,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:32:49,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:32:49,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463069501] [2021-10-11 02:32:49,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:32:49,670 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-11 02:32:49,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93339197] [2021-10-11 02:32:49,670 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:32:49,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:32:49,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:32:49,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:32:49,675 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 3 states. [2021-10-11 02:32:49,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:32:49,699 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2021-10-11 02:32:49,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:32:49,709 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2021-10-11 02:32:49,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:32:49,710 INFO L225 Difference]: With dead ends: 14 [2021-10-11 02:32:49,710 INFO L226 Difference]: Without dead ends: 13 [2021-10-11 02:32:49,711 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 [2021-10-11 02:32:49,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-10-11 02:32:49,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-10-11 02:32:49,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-10-11 02:32:49,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2021-10-11 02:32:49,715 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 6 [2021-10-11 02:32:49,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:32:49,715 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2021-10-11 02:32:49,715 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:32:49,715 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2021-10-11 02:32:49,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-11 02:32:49,716 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:32:49,716 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2021-10-11 02:32:49,716 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-11 02:32:49,717 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2021-10-11 02:32:49,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:32:49,717 INFO L82 PathProgramCache]: Analyzing trace with hash 577431471, now seen corresponding path program 1 times [2021-10-11 02:32:49,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:32:49,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043015383] [2021-10-11 02:32:49,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:32:49,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:32:49,804 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:32:49,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043015383] [2021-10-11 02:32:49,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079048974] [2021-10-11 02:32:49,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881d4712-bae5-4d56-8b47-ea5794eef965/bin/utaipan-WLngWcDbfI/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 [2021-10-11 02:32:49,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:32:49,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 19 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-11 02:32:49,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:32:50,018 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:32:50,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:32:50,091 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:32:50,092 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2021-10-11 02:32:50,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 9 [2021-10-11 02:32:50,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582188854] [2021-10-11 02:32:50,092 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-10-11 02:32:50,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:32:50,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-11 02:32:50,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-10-11 02:32:50,096 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 5 states. [2021-10-11 02:32:50,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:32:50,166 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2021-10-11 02:32:50,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-11 02:32:50,166 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2021-10-11 02:32:50,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:32:50,169 INFO L225 Difference]: With dead ends: 14 [2021-10-11 02:32:50,169 INFO L226 Difference]: Without dead ends: 13 [2021-10-11 02:32:50,172 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 [2021-10-11 02:32:50,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-10-11 02:32:50,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2021-10-11 02:32:50,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-10-11 02:32:50,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2021-10-11 02:32:50,179 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 8 [2021-10-11 02:32:50,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:32:50,181 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2021-10-11 02:32:50,181 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-10-11 02:32:50,182 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2021-10-11 02:32:50,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-11 02:32:50,182 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:32:50,183 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2021-10-11 02:32:50,395 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:32:50,396 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2021-10-11 02:32:50,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:32:50,397 INFO L82 PathProgramCache]: Analyzing trace with hash 720506461, now seen corresponding path program 1 times [2021-10-11 02:32:50,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:32:50,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702683271] [2021-10-11 02:32:50,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:32:50,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:32:50,434 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:32:50,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702683271] [2021-10-11 02:32:50,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622065222] [2021-10-11 02:32:50,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881d4712-bae5-4d56-8b47-ea5794eef965/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-11 02:32:50,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:32:50,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-11 02:32:50,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:32:50,501 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:32:50,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:32:50,553 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:32:50,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1104284197] [2021-10-11 02:32:50,575 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-10-11 02:32:50,576 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:32:50,580 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:32:50,586 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:32:50,586 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:32:50,902 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:32:51,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:32:51,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 3, 3] total 11 [2021-10-11 02:32:51,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806837491] [2021-10-11 02:32:51,100 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-10-11 02:32:51,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:32:51,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-11 02:32:51,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-10-11 02:32:51,101 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 6 states. [2021-10-11 02:32:51,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:32:51,304 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2021-10-11 02:32:51,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-11 02:32:51,305 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2021-10-11 02:32:51,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:32:51,306 INFO L225 Difference]: With dead ends: 12 [2021-10-11 02:32:51,306 INFO L226 Difference]: Without dead ends: 11 [2021-10-11 02:32:51,307 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-10-11 02:32:51,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-10-11 02:32:51,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-10-11 02:32:51,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-10-11 02:32:51,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2021-10-11 02:32:51,311 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2021-10-11 02:32:51,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:32:51,311 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2021-10-11 02:32:51,312 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-10-11 02:32:51,313 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2021-10-11 02:32:51,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-11 02:32:51,316 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:32:51,317 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1] [2021-10-11 02:32:51,539 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:32:51,540 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2021-10-11 02:32:51,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:32:51,540 INFO L82 PathProgramCache]: Analyzing trace with hash 860863857, now seen corresponding path program 1 times [2021-10-11 02:32:51,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:32:51,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646694536] [2021-10-11 02:32:51,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:32:51,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:32:51,563 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:32:51,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646694536] [2021-10-11 02:32:51,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725022302] [2021-10-11 02:32:51,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881d4712-bae5-4d56-8b47-ea5794eef965/bin/utaipan-WLngWcDbfI/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 [2021-10-11 02:32:51,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:32:51,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-11 02:32:51,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:32:51,642 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:32:51,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:32:51,677 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:32:51,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1977739908] [2021-10-11 02:32:51,680 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-10-11 02:32:51,680 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:32:51,681 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:32:51,681 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:32:51,681 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:32:51,792 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:32:51,958 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:32:51,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:32:51,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 4 [2021-10-11 02:32:51,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183341277] [2021-10-11 02:32:51,959 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-10-11 02:32:51,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:32:51,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-11 02:32:51,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-10-11 02:32:51,960 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 6 states. [2021-10-11 02:32:52,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:32:52,003 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2021-10-11 02:32:52,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-11 02:32:52,003 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2021-10-11 02:32:52,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:32:52,004 INFO L225 Difference]: With dead ends: 27 [2021-10-11 02:32:52,004 INFO L226 Difference]: Without dead ends: 26 [2021-10-11 02:32:52,004 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-10-11 02:32:52,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-10-11 02:32:52,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-10-11 02:32:52,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-10-11 02:32:52,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2021-10-11 02:32:52,009 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 10 [2021-10-11 02:32:52,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:32:52,009 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2021-10-11 02:32:52,010 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-10-11 02:32:52,010 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2021-10-11 02:32:52,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-11 02:32:52,010 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:32:52,011 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 1, 1] [2021-10-11 02:32:52,228 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:32:52,229 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2021-10-11 02:32:52,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:32:52,229 INFO L82 PathProgramCache]: Analyzing trace with hash -333652957, now seen corresponding path program 2 times [2021-10-11 02:32:52,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:32:52,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295867842] [2021-10-11 02:32:52,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:32:52,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:32:52,312 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:32:52,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295867842] [2021-10-11 02:32:52,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479748455] [2021-10-11 02:32:52,312 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881d4712-bae5-4d56-8b47-ea5794eef965/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-11 02:32:52,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-10-11 02:32:52,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 02:32:52,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 6 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:32:52,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:32:52,405 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:32:52,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:32:52,506 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:32:52,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1444831012] [2021-10-11 02:32:52,509 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-10-11 02:32:52,509 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:32:52,509 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:32:52,510 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:32:52,510 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:32:52,614 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:32:52,865 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:32:52,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:32:52,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2021-10-11 02:32:52,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526734419] [2021-10-11 02:32:52,867 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-10-11 02:32:52,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:32:52,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-11 02:32:52,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-10-11 02:32:52,868 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 12 states. [2021-10-11 02:32:52,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:32:52,959 INFO L93 Difference]: Finished difference Result 57 states and 62 transitions. [2021-10-11 02:32:52,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-11 02:32:52,959 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 25 [2021-10-11 02:32:52,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:32:52,960 INFO L225 Difference]: With dead ends: 57 [2021-10-11 02:32:52,961 INFO L226 Difference]: Without dead ends: 56 [2021-10-11 02:32:52,961 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 [2021-10-11 02:32:52,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-10-11 02:32:52,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-10-11 02:32:52,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2021-10-11 02:32:52,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2021-10-11 02:32:52,969 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 25 [2021-10-11 02:32:52,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:32:52,970 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2021-10-11 02:32:52,970 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-10-11 02:32:52,970 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2021-10-11 02:32:52,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-10-11 02:32:52,972 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:32:52,972 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 1, 1] [2021-10-11 02:32:53,195 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:32:53,196 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2021-10-11 02:32:53,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:32:53,196 INFO L82 PathProgramCache]: Analyzing trace with hash -1266934173, now seen corresponding path program 3 times [2021-10-11 02:32:53,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:32:53,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056008338] [2021-10-11 02:32:53,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:32:53,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:32:53,426 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:32:53,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056008338] [2021-10-11 02:32:53,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298913620] [2021-10-11 02:32:53,426 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881d4712-bae5-4d56-8b47-ea5794eef965/bin/utaipan-WLngWcDbfI/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 [2021-10-11 02:32:53,470 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-11 02:32:53,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 02:32:53,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-11 02:32:53,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:32:53,583 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:32:53,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:32:53,881 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:32:53,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1846208893] [2021-10-11 02:32:53,884 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-10-11 02:32:53,885 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:32:53,885 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:32:53,885 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:32:53,885 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:32:53,971 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:32:54,371 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:32:54,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:32:54,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2021-10-11 02:32:54,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096992925] [2021-10-11 02:32:54,372 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-10-11 02:32:54,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:32:54,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-11 02:32:54,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=522, Unknown=0, NotChecked=0, Total=812 [2021-10-11 02:32:54,374 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 24 states. [2021-10-11 02:32:54,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:32:54,578 INFO L93 Difference]: Finished difference Result 117 states and 128 transitions. [2021-10-11 02:32:54,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-11 02:32:54,578 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 55 [2021-10-11 02:32:54,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:32:54,585 INFO L225 Difference]: With dead ends: 117 [2021-10-11 02:32:54,586 INFO L226 Difference]: Without dead ends: 116 [2021-10-11 02:32:54,587 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 136 SyntacticMatches, 11 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=290, Invalid=522, Unknown=0, NotChecked=0, Total=812 [2021-10-11 02:32:54,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-10-11 02:32:54,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2021-10-11 02:32:54,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2021-10-11 02:32:54,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 116 transitions. [2021-10-11 02:32:54,618 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 116 transitions. Word has length 55 [2021-10-11 02:32:54,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:32:54,619 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 116 transitions. [2021-10-11 02:32:54,619 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2021-10-11 02:32:54,619 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 116 transitions. [2021-10-11 02:32:54,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-10-11 02:32:54,626 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:32:54,627 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 22, 22, 1, 1] [2021-10-11 02:32:54,840 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-10-11 02:32:54,840 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2021-10-11 02:32:54,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:32:54,840 INFO L82 PathProgramCache]: Analyzing trace with hash 1393971939, now seen corresponding path program 4 times [2021-10-11 02:32:54,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:32:54,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320544734] [2021-10-11 02:32:54,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:32:54,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:32:55,321 INFO L134 CoverageAnalysis]: Checked inductivity of 1243 backedges. 0 proven. 1243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:32:55,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320544734] [2021-10-11 02:32:55,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073161397] [2021-10-11 02:32:55,322 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881d4712-bae5-4d56-8b47-ea5794eef965/bin/utaipan-WLngWcDbfI/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 [2021-10-11 02:32:55,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:32:55,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-11 02:32:55,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:32:55,578 INFO L134 CoverageAnalysis]: Checked inductivity of 1243 backedges. 0 proven. 1243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:32:55,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:32:56,678 INFO L134 CoverageAnalysis]: Checked inductivity of 1243 backedges. 0 proven. 1243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:32:56,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1835197489] [2021-10-11 02:32:56,680 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-10-11 02:32:56,681 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:32:56,681 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:32:56,681 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:32:56,681 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:32:56,748 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:32:57,538 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:32:57,538 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:32:57,538 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 46 [2021-10-11 02:32:57,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020005121] [2021-10-11 02:32:57,540 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-10-11 02:32:57,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:32:57,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-10-11 02:32:57,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1142, Invalid=1614, Unknown=0, NotChecked=0, Total=2756 [2021-10-11 02:32:57,543 INFO L87 Difference]: Start difference. First operand 116 states and 116 transitions. Second operand 48 states. [2021-10-11 02:32:57,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:32:57,916 INFO L93 Difference]: Finished difference Result 237 states and 260 transitions. [2021-10-11 02:32:57,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-10-11 02:32:57,917 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 115 [2021-10-11 02:32:57,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:32:57,922 INFO L225 Difference]: With dead ends: 237 [2021-10-11 02:32:57,922 INFO L226 Difference]: Without dead ends: 236 [2021-10-11 02:32:57,924 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 292 SyntacticMatches, 23 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1922 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1142, Invalid=1614, Unknown=0, NotChecked=0, Total=2756 [2021-10-11 02:32:57,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-10-11 02:32:57,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 236. [2021-10-11 02:32:57,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2021-10-11 02:32:57,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 236 transitions. [2021-10-11 02:32:57,960 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 236 transitions. Word has length 115 [2021-10-11 02:32:57,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:32:57,963 INFO L481 AbstractCegarLoop]: Abstraction has 236 states and 236 transitions. [2021-10-11 02:32:57,963 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2021-10-11 02:32:57,963 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 236 transitions. [2021-10-11 02:32:57,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2021-10-11 02:32:57,976 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:32:57,976 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 47, 46, 46, 1, 1] [2021-10-11 02:32:58,191 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:32:58,192 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2021-10-11 02:32:58,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:32:58,193 INFO L82 PathProgramCache]: Analyzing trace with hash 1923709923, now seen corresponding path program 5 times [2021-10-11 02:32:58,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:32:58,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108730516] [2021-10-11 02:32:58,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:32:58,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:32:59,749 INFO L134 CoverageAnalysis]: Checked inductivity of 5359 backedges. 0 proven. 5359 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:32:59,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108730516] [2021-10-11 02:32:59,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023621688] [2021-10-11 02:32:59,749 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881d4712-bae5-4d56-8b47-ea5794eef965/bin/utaipan-WLngWcDbfI/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 [2021-10-11 02:32:59,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-10-11 02:32:59,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 02:32:59,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-11 02:32:59,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:33:00,322 INFO L134 CoverageAnalysis]: Checked inductivity of 5359 backedges. 737 proven. 21 refuted. 0 times theorem prover too weak. 4601 trivial. 0 not checked. [2021-10-11 02:33:00,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:33:00,924 INFO L134 CoverageAnalysis]: Checked inductivity of 5359 backedges. 737 proven. 21 refuted. 0 times theorem prover too weak. 4601 trivial. 0 not checked. [2021-10-11 02:33:00,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [135219744] [2021-10-11 02:33:00,930 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-10-11 02:33:00,931 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:33:00,931 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:33:00,931 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:33:00,931 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:33:01,011 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:33:04,020 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:33:04,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:33:04,020 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 8, 8] total 62 [2021-10-11 02:33:04,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542468523] [2021-10-11 02:33:04,021 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2021-10-11 02:33:04,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:33:04,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-10-11 02:33:04,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1556, Invalid=3000, Unknown=0, NotChecked=0, Total=4556 [2021-10-11 02:33:04,027 INFO L87 Difference]: Start difference. First operand 236 states and 236 transitions. Second operand 63 states. [2021-10-11 02:33:11,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:33:11,451 INFO L93 Difference]: Finished difference Result 243 states and 244 transitions. [2021-10-11 02:33:11,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2021-10-11 02:33:11,451 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 235 [2021-10-11 02:33:11,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:33:11,452 INFO L225 Difference]: With dead ends: 243 [2021-10-11 02:33:11,452 INFO L226 Difference]: Without dead ends: 0 [2021-10-11 02:33:11,464 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 894 GetRequests, 637 SyntacticMatches, 47 SemanticMatches, 210 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16506 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=12307, Invalid=32425, Unknown=0, NotChecked=0, Total=44732 [2021-10-11 02:33:11,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-11 02:33:11,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-11 02:33:11,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-10-11 02:33:11,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-11 02:33:11,465 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 235 [2021-10-11 02:33:11,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:33:11,465 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-11 02:33:11,465 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2021-10-11 02:33:11,465 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-11 02:33:11,465 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-11 02:33:11,671 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-10-11 02:33:11,673 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-11 02:33:11,784 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 222 [2021-10-11 02:33:12,187 WARN L197 SmtUtils]: Spent 400.00 ms on a formula simplification. DAG size of input: 222 DAG size of output: 34 [2021-10-11 02:33:12,190 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 18) no Hoare annotation was computed. [2021-10-11 02:33:12,190 INFO L262 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-11 02:33:12,190 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW(line 19) no Hoare annotation was computed. [2021-10-11 02:33:12,190 INFO L262 CegarLoopResult]: For program point L19(line 19) no Hoare annotation was computed. [2021-10-11 02:33:12,190 INFO L262 CegarLoopResult]: For program point L19-1(line 19) no Hoare annotation was computed. [2021-10-11 02:33:12,191 INFO L258 CegarLoopResult]: At program point L17-2(lines 17 20) the Hoare annotation is: (let ((.cse1 (<= 24 ULTIMATE.start_main_~y~0))) (let ((.cse0 (or (and (<= ULTIMATE.start_main_~x~0 2147483624) (<= ULTIMATE.start_main_~y~0 2147483647) .cse1) (= 23 ULTIMATE.start_main_~y~0)))) (or (and (<= ULTIMATE.start_main_~y~0 24) .cse0 .cse1) (and (<= ULTIMATE.start_main_~y~0 (+ (div (+ (* ULTIMATE.start_main_~x~0 (- 1)) 2147483648) 2) 1)) (<= ULTIMATE.start_main_~y~0 2147483646) .cse1) (and (<= 0 (+ ULTIMATE.start_main_~x~0 2147483648)) .cse0 (<= ULTIMATE.start_main_~x~0 (+ ULTIMATE.start_main_~y~0 2147483624)) (<= ULTIMATE.start_main_~y~0 23))))) [2021-10-11 02:33:12,191 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 18) no Hoare annotation was computed. [2021-10-11 02:33:12,191 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW(line 19) no Hoare annotation was computed. [2021-10-11 02:33:12,191 INFO L262 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-11 02:33:12,191 INFO L262 CegarLoopResult]: For program point L18(line 18) no Hoare annotation was computed. [2021-10-11 02:33:12,191 INFO L262 CegarLoopResult]: For program point L18-1(line 18) no Hoare annotation was computed. [2021-10-11 02:33:12,208 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 02:33:12 BoogieIcfgContainer [2021-10-11 02:33:12,208 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 02:33:12,208 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 02:33:12,208 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 02:33:12,209 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 02:33:12,209 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:32:49" (3/4) ... [2021-10-11 02:33:12,211 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-11 02:33:12,218 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2021-10-11 02:33:12,218 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2021-10-11 02:33:12,219 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-11 02:33:12,245 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881d4712-bae5-4d56-8b47-ea5794eef965/bin/utaipan-WLngWcDbfI/witness.graphml [2021-10-11 02:33:12,245 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 02:33:12,246 INFO L168 Benchmark]: Toolchain (without parser) took 23710.85 ms. Allocated memory was 81.8 MB in the beginning and 318.8 MB in the end (delta: 237.0 MB). Free memory was 46.1 MB in the beginning and 279.7 MB in the end (delta: -233.6 MB). Peak memory consumption was 2.7 MB. Max. memory is 16.1 GB. [2021-10-11 02:33:12,246 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 81.8 MB. Free memory is still 61.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:33:12,247 INFO L168 Benchmark]: CACSL2BoogieTranslator took 228.02 ms. Allocated memory was 81.8 MB in the beginning and 104.9 MB in the end (delta: 23.1 MB). Free memory was 45.9 MB in the beginning and 82.5 MB in the end (delta: -36.6 MB). Peak memory consumption was 8.0 MB. Max. memory is 16.1 GB. [2021-10-11 02:33:12,247 INFO L168 Benchmark]: Boogie Procedure Inliner took 32.43 ms. Allocated memory is still 104.9 MB. Free memory was 82.5 MB in the beginning and 81.2 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:33:12,248 INFO L168 Benchmark]: Boogie Preprocessor took 27.55 ms. Allocated memory is still 104.9 MB. Free memory was 81.2 MB in the beginning and 80.1 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:33:12,248 INFO L168 Benchmark]: RCFGBuilder took 237.68 ms. Allocated memory is still 104.9 MB. Free memory was 80.1 MB in the beginning and 70.1 MB in the end (delta: 10.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-11 02:33:12,260 INFO L168 Benchmark]: TraceAbstraction took 23134.96 ms. Allocated memory was 104.9 MB in the beginning and 318.8 MB in the end (delta: 213.9 MB). Free memory was 69.6 MB in the beginning and 281.8 MB in the end (delta: -212.2 MB). Peak memory consumption was 147.8 MB. Max. memory is 16.1 GB. [2021-10-11 02:33:12,260 INFO L168 Benchmark]: Witness Printer took 36.57 ms. Allocated memory is still 318.8 MB. Free memory was 281.8 MB in the beginning and 279.7 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:33:12,263 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 81.8 MB. Free memory is still 61.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 228.02 ms. Allocated memory was 81.8 MB in the beginning and 104.9 MB in the end (delta: 23.1 MB). Free memory was 45.9 MB in the beginning and 82.5 MB in the end (delta: -36.6 MB). Peak memory consumption was 8.0 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 32.43 ms. Allocated memory is still 104.9 MB. Free memory was 82.5 MB in the beginning and 81.2 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 27.55 ms. Allocated memory is still 104.9 MB. Free memory was 81.2 MB in the beginning and 80.1 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 237.68 ms. Allocated memory is still 104.9 MB. Free memory was 80.1 MB in the beginning and 70.1 MB in the end (delta: 10.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 23134.96 ms. Allocated memory was 104.9 MB in the beginning and 318.8 MB in the end (delta: 213.9 MB). Free memory was 69.6 MB in the beginning and 281.8 MB in the end (delta: -212.2 MB). Peak memory consumption was 147.8 MB. Max. memory is 16.1 GB. * Witness Printer took 36.57 ms. Allocated memory is still 318.8 MB. Free memory was 281.8 MB in the beginning and 279.7 MB in the end (delta: 2.2 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: 19]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 18]: 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: 18]: 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: 17]: Loop Invariant Derived loop invariant: (((y <= 24 && (((x <= 2147483624 && y <= 2147483647) && 24 <= y) || 23 == y)) && 24 <= y) || ((y <= (x * -1 + 2147483648) / 2 + 1 && y <= 2147483646) && 24 <= y)) || (((0 <= x + 2147483648 && (((x <= 2147483624 && y <= 2147483647) && 24 <= y) || 23 == y)) && x <= y + 2147483624) && y <= 23) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 11 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 22.5s, OverallIterations: 10, TraceHistogramMax: 47, AutomataDifference: 8.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.5s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 28 SDtfs, 384 SDslu, 83 SDs, 0 SdLazy, 739 SolverSat, 217 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1596 GetRequests, 1164 SyntacticMatches, 91 SemanticMatches, 341 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19193 ImplicationChecksByTransitivity, 15.5s 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, 68 HoareAnnotationTreeSize, 1 FomulaSimplifications, 4 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 1 FomulaSimplificationsInter, 2836 FormulaSimplificationTreeSizeReductionInter, 0.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 5.5s InterpolantComputationTime, 927 NumberOfCodeBlocks, 717 NumberOfCodeBlocksAsserted, 26 NumberOfCheckSat, 1360 ConstructedInterpolants, 0 QuantifiedInterpolants, 455104 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]: 328, ICFG_INTERPRETER_ENTERED_PROCEDURES: 1, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 9, DAG_INTERPRETER_EARLY_EXITS: 0, TOOLS_POST_APPLICATIONS: 24, TOOLS_POST_TIME[ms]: 61, 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]: 53, TOOLS_QUANTIFIERELIM_MAX_TIME[ms]: 15, FLUID_QUERY_TIME[ms]: 3, FLUID_QUERIES: 39, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 4, DOMAIN_JOIN_TIME[ms]: 80, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME[ms]: 0, DOMAIN_WIDEN_APPLICATIONS: 2, DOMAIN_WIDEN_TIME[ms]: 122, DOMAIN_ISSUBSETEQ_APPLICATIONS: 3, DOMAIN_ISSUBSETEQ_TIME[ms]: 8, DOMAIN_ISBOTTOM_APPLICATIONS: 9, DOMAIN_ISBOTTOM_TIME[ms]: 14, LOOP_SUMMARIZER_APPLICATIONS: 1, LOOP_SUMMARIZER_CACHE_MISSES: 1, LOOP_SUMMARIZER_OVERALL_TIME[ms]: 185, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 184, 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]: 2, PATH_EXPR_TIME[ms]: 2, REGEX_TO_DAG_TIME[ms]: 3, DAG_COMPRESSION_TIME[ms]: 8, DAG_COMPRESSION_PROCESSED_NODES: 77, DAG_COMPRESSION_RETAINED_NODES: 27, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...