./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-vcloud-master/worker/run_dir_796829b6-d90c-42b8-83fc-f469eada0374/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_796829b6-d90c-42b8-83fc-f469eada0374/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_796829b6-d90c-42b8-83fc-f469eada0374/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_796829b6-d90c-42b8-83fc-f469eada0374/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-crafted-lit/HeizmannHoenickeLeikePodelski-ATVA2013-Fig1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_796829b6-d90c-42b8-83fc-f469eada0374/bin/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_796829b6-d90c-42b8-83fc-f469eada0374/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 0564e568992a96ba006237c1af458e049de52506 ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-03 12:37:38,885 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-03 12:37:38,904 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-03 12:37:38,956 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-03 12:37:38,957 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-03 12:37:38,961 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-03 12:37:38,963 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-03 12:37:38,965 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-03 12:37:38,967 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-03 12:37:38,969 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-03 12:37:38,970 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-03 12:37:38,971 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-03 12:37:38,972 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-03 12:37:38,973 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-03 12:37:38,974 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-03 12:37:38,976 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-03 12:37:38,977 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-03 12:37:38,978 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-03 12:37:38,981 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-03 12:37:38,983 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-03 12:37:38,986 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-03 12:37:38,992 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-03 12:37:38,994 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-03 12:37:38,995 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-03 12:37:39,003 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-03 12:37:39,008 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-03 12:37:39,009 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-03 12:37:39,010 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-03 12:37:39,011 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-03 12:37:39,012 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-03 12:37:39,013 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-03 12:37:39,015 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-03 12:37:39,017 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-03 12:37:39,018 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-03 12:37:39,020 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-03 12:37:39,021 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-03 12:37:39,022 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-03 12:37:39,023 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-03 12:37:39,023 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-03 12:37:39,025 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-03 12:37:39,025 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-03 12:37:39,028 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_796829b6-d90c-42b8-83fc-f469eada0374/bin/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf [2020-12-03 12:37:39,071 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-03 12:37:39,071 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-03 12:37:39,073 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-03 12:37:39,073 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-03 12:37:39,074 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-03 12:37:39,074 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-03 12:37:39,074 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-03 12:37:39,074 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-03 12:37:39,075 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-03 12:37:39,075 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-03 12:37:39,076 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-03 12:37:39,076 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-03 12:37:39,076 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-03 12:37:39,077 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-03 12:37:39,077 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-03 12:37:39,078 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-03 12:37:39,078 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-03 12:37:39,078 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-03 12:37:39,078 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-03 12:37:39,079 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-03 12:37:39,079 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-03 12:37:39,079 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-03 12:37:39,079 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2020-12-03 12:37:39,080 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-03 12:37:39,080 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-03 12:37:39,080 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-03 12:37:39,080 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-03 12:37:39,081 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-03 12:37:39,081 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-03 12:37:39,081 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-03 12:37:39,081 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-03 12:37:39,082 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-03 12:37:39,082 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-03 12:37:39,082 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-03 12:37:39,083 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-03 12:37:39,083 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-03 12:37:39,083 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-03 12:37:39,083 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_796829b6-d90c-42b8-83fc-f469eada0374/bin/utaipan/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_796829b6-d90c-42b8-83fc-f469eada0374/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0564e568992a96ba006237c1af458e049de52506 [2020-12-03 12:37:39,341 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-03 12:37:39,368 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-03 12:37:39,370 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-03 12:37:39,371 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-03 12:37:39,379 INFO L275 PluginConnector]: CDTParser initialized [2020-12-03 12:37:39,381 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_796829b6-d90c-42b8-83fc-f469eada0374/bin/utaipan/../../sv-benchmarks/c/termination-crafted-lit/HeizmannHoenickeLeikePodelski-ATVA2013-Fig1.c [2020-12-03 12:37:39,442 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_796829b6-d90c-42b8-83fc-f469eada0374/bin/utaipan/data/280309c3f/273f45eb31dd48a197d879000e55dab1/FLAG0c27a9f77 [2020-12-03 12:37:39,897 INFO L306 CDTParser]: Found 1 translation units. [2020-12-03 12:37:39,898 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_796829b6-d90c-42b8-83fc-f469eada0374/sv-benchmarks/c/termination-crafted-lit/HeizmannHoenickeLeikePodelski-ATVA2013-Fig1.c [2020-12-03 12:37:39,907 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_796829b6-d90c-42b8-83fc-f469eada0374/bin/utaipan/data/280309c3f/273f45eb31dd48a197d879000e55dab1/FLAG0c27a9f77 [2020-12-03 12:37:40,289 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_796829b6-d90c-42b8-83fc-f469eada0374/bin/utaipan/data/280309c3f/273f45eb31dd48a197d879000e55dab1 [2020-12-03 12:37:40,291 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-03 12:37:40,292 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-03 12:37:40,294 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-03 12:37:40,294 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-03 12:37:40,298 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-03 12:37:40,300 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 12:37:40" (1/1) ... [2020-12-03 12:37:40,303 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27b3baa4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:37:40, skipping insertion in model container [2020-12-03 12:37:40,304 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 12:37:40" (1/1) ... [2020-12-03 12:37:40,311 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-03 12:37:40,326 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-03 12:37:40,491 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-03 12:37:40,515 INFO L203 MainTranslator]: Completed pre-run [2020-12-03 12:37:40,526 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-03 12:37:40,539 INFO L208 MainTranslator]: Completed translation [2020-12-03 12:37:40,539 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:37:40 WrapperNode [2020-12-03 12:37:40,540 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-03 12:37:40,541 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-03 12:37:40,541 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-03 12:37:40,541 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-03 12:37:40,549 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:37:40" (1/1) ... [2020-12-03 12:37:40,554 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:37:40" (1/1) ... [2020-12-03 12:37:40,570 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-03 12:37:40,571 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-03 12:37:40,571 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-03 12:37:40,571 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-03 12:37:40,580 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:37:40" (1/1) ... [2020-12-03 12:37:40,580 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:37:40" (1/1) ... [2020-12-03 12:37:40,581 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:37:40" (1/1) ... [2020-12-03 12:37:40,581 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:37:40" (1/1) ... [2020-12-03 12:37:40,583 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:37:40" (1/1) ... [2020-12-03 12:37:40,586 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:37:40" (1/1) ... [2020-12-03 12:37:40,587 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:37:40" (1/1) ... [2020-12-03 12:37:40,588 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-03 12:37:40,589 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-03 12:37:40,589 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-03 12:37:40,590 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-03 12:37:40,591 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:37:40" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_796829b6-d90c-42b8-83fc-f469eada0374/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-03 12:37:40,685 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-03 12:37:40,686 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-03 12:37:40,891 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-03 12:37:40,892 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2020-12-03 12:37:40,894 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 12:37:40 BoogieIcfgContainer [2020-12-03 12:37:40,894 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-03 12:37:40,896 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-03 12:37:40,896 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-03 12:37:40,900 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-03 12:37:40,900 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.12 12:37:40" (1/3) ... [2020-12-03 12:37:40,901 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@593ed9ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 12:37:40, skipping insertion in model container [2020-12-03 12:37:40,901 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:37:40" (2/3) ... [2020-12-03 12:37:40,901 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@593ed9ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 12:37:40, skipping insertion in model container [2020-12-03 12:37:40,901 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 12:37:40" (3/3) ... [2020-12-03 12:37:40,903 INFO L111 eAbstractionObserver]: Analyzing ICFG HeizmannHoenickeLeikePodelski-ATVA2013-Fig1.c [2020-12-03 12:37:40,917 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-03 12:37:40,920 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2020-12-03 12:37:40,938 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-12-03 12:37:40,962 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-03 12:37:40,962 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-03 12:37:40,962 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-03 12:37:40,963 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-03 12:37:40,963 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-03 12:37:40,963 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-03 12:37:40,963 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-03 12:37:40,963 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-03 12:37:40,983 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2020-12-03 12:37:40,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-12-03 12:37:40,988 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:37:40,989 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-12-03 12:37:40,990 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-03 12:37:40,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:37:40,996 INFO L82 PathProgramCache]: Analyzing trace with hash 31073, now seen corresponding path program 1 times [2020-12-03 12:37:41,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:37:41,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087654428] [2020-12-03 12:37:41,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:37:41,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:37:41,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:37:41,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087654428] [2020-12-03 12:37:41,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 12:37:41,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-12-03 12:37:41,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78870843] [2020-12-03 12:37:41,196 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-03 12:37:41,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:37:41,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-03 12:37:41,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-03 12:37:41,226 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 3 states. [2020-12-03 12:37:41,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:37:41,319 INFO L93 Difference]: Finished difference Result 16 states and 17 transitions. [2020-12-03 12:37:41,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-03 12:37:41,321 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-12-03 12:37:41,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:37:41,330 INFO L225 Difference]: With dead ends: 16 [2020-12-03 12:37:41,330 INFO L226 Difference]: Without dead ends: 13 [2020-12-03 12:37:41,333 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-03 12:37:41,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-12-03 12:37:41,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2020-12-03 12:37:41,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-12-03 12:37:41,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2020-12-03 12:37:41,380 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 3 [2020-12-03 12:37:41,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:37:41,380 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2020-12-03 12:37:41,381 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-03 12:37:41,381 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2020-12-03 12:37:41,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-03 12:37:41,381 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:37:41,382 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-03 12:37:41,382 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-03 12:37:41,382 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-03 12:37:41,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:37:41,383 INFO L82 PathProgramCache]: Analyzing trace with hash 963307, now seen corresponding path program 1 times [2020-12-03 12:37:41,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:37:41,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323753375] [2020-12-03 12:37:41,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:37:41,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:37:41,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:37:41,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323753375] [2020-12-03 12:37:41,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 12:37:41,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-03 12:37:41,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936611220] [2020-12-03 12:37:41,445 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-03 12:37:41,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:37:41,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-03 12:37:41,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-03 12:37:41,447 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 4 states. [2020-12-03 12:37:41,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:37:41,544 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2020-12-03 12:37:41,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-03 12:37:41,545 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2020-12-03 12:37:41,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:37:41,546 INFO L225 Difference]: With dead ends: 17 [2020-12-03 12:37:41,546 INFO L226 Difference]: Without dead ends: 15 [2020-12-03 12:37:41,547 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-03 12:37:41,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-12-03 12:37:41,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2020-12-03 12:37:41,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-12-03 12:37:41,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-12-03 12:37:41,557 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 4 [2020-12-03 12:37:41,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:37:41,559 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-12-03 12:37:41,560 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-03 12:37:41,560 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-12-03 12:37:41,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-03 12:37:41,561 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:37:41,562 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-03 12:37:41,562 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-03 12:37:41,562 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-03 12:37:41,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:37:41,564 INFO L82 PathProgramCache]: Analyzing trace with hash 925739501, now seen corresponding path program 1 times [2020-12-03 12:37:41,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:37:41,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635322096] [2020-12-03 12:37:41,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:37:41,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:37:41,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:37:41,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635322096] [2020-12-03 12:37:41,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 12:37:41,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-12-03 12:37:41,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107940944] [2020-12-03 12:37:41,611 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-03 12:37:41,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:37:41,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-03 12:37:41,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-03 12:37:41,617 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 3 states. [2020-12-03 12:37:41,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:37:41,638 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2020-12-03 12:37:41,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-03 12:37:41,640 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-12-03 12:37:41,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:37:41,641 INFO L225 Difference]: With dead ends: 14 [2020-12-03 12:37:41,648 INFO L226 Difference]: Without dead ends: 13 [2020-12-03 12:37:41,649 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-03 12:37:41,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-12-03 12:37:41,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-12-03 12:37:41,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-12-03 12:37:41,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-12-03 12:37:41,655 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 6 [2020-12-03 12:37:41,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:37:41,655 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-12-03 12:37:41,655 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-03 12:37:41,655 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-12-03 12:37:41,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-03 12:37:41,656 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:37:41,656 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2020-12-03 12:37:41,657 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-03 12:37:41,658 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-03 12:37:41,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:37:41,661 INFO L82 PathProgramCache]: Analyzing trace with hash 577431471, now seen corresponding path program 1 times [2020-12-03 12:37:41,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:37:41,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385620993] [2020-12-03 12:37:41,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:37:41,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:37:41,737 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:37:41,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385620993] [2020-12-03 12:37:41,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350597675] [2020-12-03 12:37:41,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_796829b6-d90c-42b8-83fc-f469eada0374/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 12:37:41,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:37:41,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 19 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-03 12:37:41,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 12:37:41,940 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:37:41,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 12:37:42,016 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:37:42,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2020-12-03 12:37:42,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 9 [2020-12-03 12:37:42,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620579011] [2020-12-03 12:37:42,017 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-03 12:37:42,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:37:42,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-03 12:37:42,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2020-12-03 12:37:42,018 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 5 states. [2020-12-03 12:37:42,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:37:42,098 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2020-12-03 12:37:42,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-03 12:37:42,098 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-12-03 12:37:42,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:37:42,099 INFO L225 Difference]: With dead ends: 14 [2020-12-03 12:37:42,099 INFO L226 Difference]: Without dead ends: 13 [2020-12-03 12:37:42,100 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2020-12-03 12:37:42,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-12-03 12:37:42,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2020-12-03 12:37:42,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-12-03 12:37:42,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2020-12-03 12:37:42,102 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 8 [2020-12-03 12:37:42,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:37:42,103 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2020-12-03 12:37:42,103 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-03 12:37:42,103 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2020-12-03 12:37:42,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-03 12:37:42,103 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:37:42,103 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2020-12-03 12:37:42,332 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 12:37:42,332 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-03 12:37:42,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:37:42,333 INFO L82 PathProgramCache]: Analyzing trace with hash 720506461, now seen corresponding path program 1 times [2020-12-03 12:37:42,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:37:42,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575405766] [2020-12-03 12:37:42,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:37:42,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:37:42,387 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:37:42,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575405766] [2020-12-03 12:37:42,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533089504] [2020-12-03 12:37:42,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_796829b6-d90c-42b8-83fc-f469eada0374/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2020-12-03 12:37:42,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:37:42,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-03 12:37:42,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 12:37:42,485 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:37:42,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 12:37:42,558 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:37:42,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [364438728] [2020-12-03 12:37:42,583 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-12-03 12:37:42,584 INFO L166 IcfgInterpreter]: Building call graph [2020-12-03 12:37:42,588 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-03 12:37:42,592 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-03 12:37:42,593 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-03 12:37:42,900 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-03 12:37:43,079 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2020-12-03 12:37:43,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 3, 3] total 11 [2020-12-03 12:37:43,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170528481] [2020-12-03 12:37:43,081 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-03 12:37:43,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:37:43,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-03 12:37:43,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-12-03 12:37:43,083 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 6 states. [2020-12-03 12:37:43,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:37:43,277 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2020-12-03 12:37:43,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-03 12:37:43,278 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2020-12-03 12:37:43,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:37:43,279 INFO L225 Difference]: With dead ends: 12 [2020-12-03 12:37:43,279 INFO L226 Difference]: Without dead ends: 11 [2020-12-03 12:37:43,280 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2020-12-03 12:37:43,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2020-12-03 12:37:43,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2020-12-03 12:37:43,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-12-03 12:37:43,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2020-12-03 12:37:43,286 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2020-12-03 12:37:43,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:37:43,287 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2020-12-03 12:37:43,288 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-03 12:37:43,292 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2020-12-03 12:37:43,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-03 12:37:43,292 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:37:43,292 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1] [2020-12-03 12:37:43,520 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 12:37:43,523 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-03 12:37:43,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:37:43,524 INFO L82 PathProgramCache]: Analyzing trace with hash 860863857, now seen corresponding path program 1 times [2020-12-03 12:37:43,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:37:43,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300883944] [2020-12-03 12:37:43,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:37:43,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:37:43,547 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:37:43,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300883944] [2020-12-03 12:37:43,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182743992] [2020-12-03 12:37:43,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_796829b6-d90c-42b8-83fc-f469eada0374/bin/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 12:37:43,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:37:43,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-03 12:37:43,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 12:37:43,600 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:37:43,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 12:37:43,651 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:37:43,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [7524460] [2020-12-03 12:37:43,654 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-12-03 12:37:43,655 INFO L166 IcfgInterpreter]: Building call graph [2020-12-03 12:37:43,656 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-03 12:37:43,657 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-03 12:37:43,658 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-03 12:37:43,795 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-03 12:37:43,969 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-03 12:37:43,969 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-03 12:37:43,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 4 [2020-12-03 12:37:43,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7554330] [2020-12-03 12:37:43,970 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-03 12:37:43,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:37:43,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-03 12:37:43,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-12-03 12:37:43,972 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 6 states. [2020-12-03 12:37:44,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:37:44,023 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2020-12-03 12:37:44,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-03 12:37:44,024 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-12-03 12:37:44,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:37:44,025 INFO L225 Difference]: With dead ends: 27 [2020-12-03 12:37:44,025 INFO L226 Difference]: Without dead ends: 26 [2020-12-03 12:37:44,026 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 [2020-12-03 12:37:44,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-03 12:37:44,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-12-03 12:37:44,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-03 12:37:44,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2020-12-03 12:37:44,036 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 10 [2020-12-03 12:37:44,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:37:44,036 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2020-12-03 12:37:44,036 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-03 12:37:44,036 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2020-12-03 12:37:44,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-03 12:37:44,038 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:37:44,038 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 1, 1] [2020-12-03 12:37:44,252 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 12:37:44,252 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-03 12:37:44,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:37:44,252 INFO L82 PathProgramCache]: Analyzing trace with hash -333652957, now seen corresponding path program 2 times [2020-12-03 12:37:44,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:37:44,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739558914] [2020-12-03 12:37:44,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:37:44,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:37:44,343 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:37:44,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739558914] [2020-12-03 12:37:44,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375589387] [2020-12-03 12:37:44,344 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_796829b6-d90c-42b8-83fc-f469eada0374/bin/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 12:37:44,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-03 12:37:44,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-03 12:37:44,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-03 12:37:44,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 12:37:44,427 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:37:44,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 12:37:44,525 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:37:44,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [638712455] [2020-12-03 12:37:44,528 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-12-03 12:37:44,528 INFO L166 IcfgInterpreter]: Building call graph [2020-12-03 12:37:44,529 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-03 12:37:44,529 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-03 12:37:44,529 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-03 12:37:44,604 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-03 12:37:44,861 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-03 12:37:44,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-03 12:37:44,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2020-12-03 12:37:44,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426230593] [2020-12-03 12:37:44,866 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-03 12:37:44,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:37:44,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-03 12:37:44,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-12-03 12:37:44,869 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 12 states. [2020-12-03 12:37:44,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:37:44,962 INFO L93 Difference]: Finished difference Result 57 states and 62 transitions. [2020-12-03 12:37:44,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-03 12:37:44,962 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 25 [2020-12-03 12:37:44,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:37:44,965 INFO L225 Difference]: With dead ends: 57 [2020-12-03 12:37:44,965 INFO L226 Difference]: Without dead ends: 56 [2020-12-03 12:37:44,966 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 58 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-12-03 12:37:44,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-12-03 12:37:44,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-12-03 12:37:44,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-03 12:37:44,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2020-12-03 12:37:45,000 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 25 [2020-12-03 12:37:45,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:37:45,001 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2020-12-03 12:37:45,001 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-03 12:37:45,001 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2020-12-03 12:37:45,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-03 12:37:45,003 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:37:45,003 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 1, 1] [2020-12-03 12:37:45,216 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 12:37:45,216 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-03 12:37:45,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:37:45,216 INFO L82 PathProgramCache]: Analyzing trace with hash -1266934173, now seen corresponding path program 3 times [2020-12-03 12:37:45,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:37:45,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939008266] [2020-12-03 12:37:45,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:37:45,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:37:45,403 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:37:45,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939008266] [2020-12-03 12:37:45,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287178759] [2020-12-03 12:37:45,403 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_796829b6-d90c-42b8-83fc-f469eada0374/bin/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 12:37:45,448 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-03 12:37:45,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-03 12:37:45,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-03 12:37:45,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 12:37:45,565 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:37:45,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 12:37:45,919 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:37:45,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [749934835] [2020-12-03 12:37:45,922 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-12-03 12:37:45,922 INFO L166 IcfgInterpreter]: Building call graph [2020-12-03 12:37:45,923 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-03 12:37:45,923 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-03 12:37:45,924 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-03 12:37:46,024 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-03 12:37:46,425 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-03 12:37:46,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-03 12:37:46,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2020-12-03 12:37:46,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584393902] [2020-12-03 12:37:46,426 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-03 12:37:46,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:37:46,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-03 12:37:46,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=522, Unknown=0, NotChecked=0, Total=812 [2020-12-03 12:37:46,427 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 24 states. [2020-12-03 12:37:46,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:37:46,629 INFO L93 Difference]: Finished difference Result 117 states and 128 transitions. [2020-12-03 12:37:46,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-03 12:37:46,630 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 55 [2020-12-03 12:37:46,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:37:46,636 INFO L225 Difference]: With dead ends: 117 [2020-12-03 12:37:46,636 INFO L226 Difference]: Without dead ends: 116 [2020-12-03 12:37:46,638 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 136 SyntacticMatches, 11 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=290, Invalid=522, Unknown=0, NotChecked=0, Total=812 [2020-12-03 12:37:46,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-12-03 12:37:46,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2020-12-03 12:37:46,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-12-03 12:37:46,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 116 transitions. [2020-12-03 12:37:46,664 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 116 transitions. Word has length 55 [2020-12-03 12:37:46,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:37:46,665 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 116 transitions. [2020-12-03 12:37:46,665 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-03 12:37:46,665 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 116 transitions. [2020-12-03 12:37:46,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-12-03 12:37:46,669 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:37:46,669 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 22, 22, 1, 1] [2020-12-03 12:37:46,884 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2020-12-03 12:37:46,884 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-03 12:37:46,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:37:46,884 INFO L82 PathProgramCache]: Analyzing trace with hash 1393971939, now seen corresponding path program 4 times [2020-12-03 12:37:46,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:37:46,885 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880335363] [2020-12-03 12:37:46,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:37:46,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:37:47,426 INFO L134 CoverageAnalysis]: Checked inductivity of 1243 backedges. 0 proven. 1243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:37:47,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880335363] [2020-12-03 12:37:47,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417852549] [2020-12-03 12:37:47,426 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_796829b6-d90c-42b8-83fc-f469eada0374/bin/utaipan/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 12:37:47,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:37:47,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-03 12:37:47,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 12:37:47,685 INFO L134 CoverageAnalysis]: Checked inductivity of 1243 backedges. 0 proven. 1243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:37:47,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 12:37:48,801 INFO L134 CoverageAnalysis]: Checked inductivity of 1243 backedges. 0 proven. 1243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:37:48,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [329258366] [2020-12-03 12:37:48,806 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-12-03 12:37:48,806 INFO L166 IcfgInterpreter]: Building call graph [2020-12-03 12:37:48,806 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-03 12:37:48,806 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-03 12:37:48,807 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-03 12:37:48,890 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-03 12:37:49,797 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-03 12:37:49,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-03 12:37:49,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 46 [2020-12-03 12:37:49,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572501530] [2020-12-03 12:37:49,801 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-12-03 12:37:49,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:37:49,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-12-03 12:37:49,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1142, Invalid=1614, Unknown=0, NotChecked=0, Total=2756 [2020-12-03 12:37:49,808 INFO L87 Difference]: Start difference. First operand 116 states and 116 transitions. Second operand 48 states. [2020-12-03 12:37:50,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:37:50,188 INFO L93 Difference]: Finished difference Result 237 states and 260 transitions. [2020-12-03 12:37:50,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-12-03 12:37:50,189 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 115 [2020-12-03 12:37:50,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:37:50,191 INFO L225 Difference]: With dead ends: 237 [2020-12-03 12:37:50,191 INFO L226 Difference]: Without dead ends: 236 [2020-12-03 12:37:50,193 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 292 SyntacticMatches, 23 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1922 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1142, Invalid=1614, Unknown=0, NotChecked=0, Total=2756 [2020-12-03 12:37:50,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-12-03 12:37:50,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 236. [2020-12-03 12:37:50,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2020-12-03 12:37:50,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 236 transitions. [2020-12-03 12:37:50,210 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 236 transitions. Word has length 115 [2020-12-03 12:37:50,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:37:50,210 INFO L481 AbstractCegarLoop]: Abstraction has 236 states and 236 transitions. [2020-12-03 12:37:50,210 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-12-03 12:37:50,210 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 236 transitions. [2020-12-03 12:37:50,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2020-12-03 12:37:50,214 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:37:50,214 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 47, 46, 46, 1, 1] [2020-12-03 12:37:50,436 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 12:37:50,436 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-03 12:37:50,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:37:50,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1923709923, now seen corresponding path program 5 times [2020-12-03 12:37:50,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:37:50,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411225620] [2020-12-03 12:37:50,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:37:50,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:37:52,038 INFO L134 CoverageAnalysis]: Checked inductivity of 5359 backedges. 0 proven. 5359 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:37:52,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411225620] [2020-12-03 12:37:52,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651169532] [2020-12-03 12:37:52,038 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_796829b6-d90c-42b8-83fc-f469eada0374/bin/utaipan/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 12:37:52,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-03 12:37:52,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-03 12:37:52,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-03 12:37:52,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 12:37:52,630 INFO L134 CoverageAnalysis]: Checked inductivity of 5359 backedges. 737 proven. 21 refuted. 0 times theorem prover too weak. 4601 trivial. 0 not checked. [2020-12-03 12:37:52,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 12:37:53,220 INFO L134 CoverageAnalysis]: Checked inductivity of 5359 backedges. 737 proven. 21 refuted. 0 times theorem prover too weak. 4601 trivial. 0 not checked. [2020-12-03 12:37:53,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2108010626] [2020-12-03 12:37:53,228 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-12-03 12:37:53,228 INFO L166 IcfgInterpreter]: Building call graph [2020-12-03 12:37:53,230 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-03 12:37:53,231 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-03 12:37:53,231 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-03 12:37:53,312 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-03 12:37:56,405 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-03 12:37:56,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-03 12:37:56,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 8, 8] total 62 [2020-12-03 12:37:56,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944689165] [2020-12-03 12:37:56,406 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-12-03 12:37:56,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:37:56,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-12-03 12:37:56,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1556, Invalid=3000, Unknown=0, NotChecked=0, Total=4556 [2020-12-03 12:37:56,410 INFO L87 Difference]: Start difference. First operand 236 states and 236 transitions. Second operand 63 states. [2020-12-03 12:38:04,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:38:04,050 INFO L93 Difference]: Finished difference Result 243 states and 244 transitions. [2020-12-03 12:38:04,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2020-12-03 12:38:04,050 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 235 [2020-12-03 12:38:04,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:38:04,052 INFO L225 Difference]: With dead ends: 243 [2020-12-03 12:38:04,052 INFO L226 Difference]: Without dead ends: 0 [2020-12-03 12:38:04,066 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 894 GetRequests, 637 SyntacticMatches, 47 SemanticMatches, 210 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16506 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=12307, Invalid=32425, Unknown=0, NotChecked=0, Total=44732 [2020-12-03 12:38:04,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-03 12:38:04,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-03 12:38:04,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-03 12:38:04,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-03 12:38:04,067 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 235 [2020-12-03 12:38:04,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:38:04,067 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-03 12:38:04,067 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-12-03 12:38:04,067 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-03 12:38:04,067 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-03 12:38:04,276 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2020-12-03 12:38:04,277 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-12-03 12:38:04,453 WARN L197 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 222 [2020-12-03 12:38:04,923 WARN L197 SmtUtils]: Spent 467.00 ms on a formula simplification. DAG size of input: 222 DAG size of output: 34 [2020-12-03 12:38:04,926 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 18) no Hoare annotation was computed. [2020-12-03 12:38:04,926 INFO L262 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-12-03 12:38:04,926 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW(line 19) no Hoare annotation was computed. [2020-12-03 12:38:04,926 INFO L262 CegarLoopResult]: For program point L19(line 19) no Hoare annotation was computed. [2020-12-03 12:38:04,926 INFO L262 CegarLoopResult]: For program point L19-1(line 19) no Hoare annotation was computed. [2020-12-03 12:38:04,927 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))))) [2020-12-03 12:38:04,927 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 18) no Hoare annotation was computed. [2020-12-03 12:38:04,927 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW(line 19) no Hoare annotation was computed. [2020-12-03 12:38:04,927 INFO L262 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-12-03 12:38:04,927 INFO L262 CegarLoopResult]: For program point L18(line 18) no Hoare annotation was computed. [2020-12-03 12:38:04,927 INFO L262 CegarLoopResult]: For program point L18-1(line 18) no Hoare annotation was computed. [2020-12-03 12:38:04,952 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.12 12:38:04 BoogieIcfgContainer [2020-12-03 12:38:04,953 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-03 12:38:04,953 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-03 12:38:04,953 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-03 12:38:04,954 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-03 12:38:04,954 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 12:37:40" (3/4) ... [2020-12-03 12:38:04,960 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-03 12:38:04,971 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2020-12-03 12:38:04,971 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2020-12-03 12:38:04,972 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-03 12:38:05,011 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_796829b6-d90c-42b8-83fc-f469eada0374/bin/utaipan/witness.graphml [2020-12-03 12:38:05,011 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-03 12:38:05,012 INFO L168 Benchmark]: Toolchain (without parser) took 24719.61 ms. Allocated memory was 109.1 MB in the beginning and 281.0 MB in the end (delta: 172.0 MB). Free memory was 81.3 MB in the beginning and 208.3 MB in the end (delta: -127.0 MB). Peak memory consumption was 45.2 MB. Max. memory is 16.1 GB. [2020-12-03 12:38:05,013 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 109.1 MB. Free memory is still 68.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-03 12:38:05,014 INFO L168 Benchmark]: CACSL2BoogieTranslator took 246.08 ms. Allocated memory is still 109.1 MB. Free memory was 81.3 MB in the beginning and 86.3 MB in the end (delta: -5.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-12-03 12:38:05,015 INFO L168 Benchmark]: Boogie Procedure Inliner took 29.20 ms. Allocated memory is still 109.1 MB. Free memory was 86.3 MB in the beginning and 85.1 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-03 12:38:05,018 INFO L168 Benchmark]: Boogie Preprocessor took 17.76 ms. Allocated memory is still 109.1 MB. Free memory was 85.1 MB in the beginning and 84.0 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-03 12:38:05,018 INFO L168 Benchmark]: RCFGBuilder took 304.79 ms. Allocated memory is still 109.1 MB. Free memory was 84.0 MB in the beginning and 73.8 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-12-03 12:38:05,019 INFO L168 Benchmark]: TraceAbstraction took 24057.17 ms. Allocated memory was 109.1 MB in the beginning and 281.0 MB in the end (delta: 172.0 MB). Free memory was 73.4 MB in the beginning and 211.4 MB in the end (delta: -138.0 MB). Peak memory consumption was 161.8 MB. Max. memory is 16.1 GB. [2020-12-03 12:38:05,019 INFO L168 Benchmark]: Witness Printer took 58.10 ms. Allocated memory is still 281.0 MB. Free memory was 210.4 MB in the beginning and 208.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-03 12:38:05,021 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 109.1 MB. Free memory is still 68.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 246.08 ms. Allocated memory is still 109.1 MB. Free memory was 81.3 MB in the beginning and 86.3 MB in the end (delta: -5.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 29.20 ms. Allocated memory is still 109.1 MB. Free memory was 86.3 MB in the beginning and 85.1 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 17.76 ms. Allocated memory is still 109.1 MB. Free memory was 85.1 MB in the beginning and 84.0 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 304.79 ms. Allocated memory is still 109.1 MB. Free memory was 84.0 MB in the beginning and 73.8 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 24057.17 ms. Allocated memory was 109.1 MB in the beginning and 281.0 MB in the end (delta: 172.0 MB). Free memory was 73.4 MB in the beginning and 211.4 MB in the end (delta: -138.0 MB). Peak memory consumption was 161.8 MB. Max. memory is 16.1 GB. * Witness Printer took 58.10 ms. Allocated memory is still 281.0 MB. Free memory was 210.4 MB in the beginning and 208.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 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: 23.3s, OverallIterations: 10, TraceHistogramMax: 47, AutomataDifference: 8.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.6s, 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, 16.0s 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, 0.4s SatisfiabilityAnalysisTime, 5.8s 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]: 318, 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]: 58, 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]: 41, TOOLS_QUANTIFIERELIM_MAX_TIME[ms]: 7, FLUID_QUERY_TIME[ms]: 5, FLUID_QUERIES: 39, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 4, DOMAIN_JOIN_TIME[ms]: 72, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME[ms]: 0, DOMAIN_WIDEN_APPLICATIONS: 2, DOMAIN_WIDEN_TIME[ms]: 113, DOMAIN_ISSUBSETEQ_APPLICATIONS: 3, DOMAIN_ISSUBSETEQ_TIME[ms]: 8, DOMAIN_ISBOTTOM_APPLICATIONS: 9, DOMAIN_ISBOTTOM_TIME[ms]: 20, LOOP_SUMMARIZER_APPLICATIONS: 1, LOOP_SUMMARIZER_CACHE_MISSES: 1, LOOP_SUMMARIZER_OVERALL_TIME[ms]: 175, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 175, 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]: 1, PATH_EXPR_TIME[ms]: 3, 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...