./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-crafted/NonTermination4.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_b169b3a9-0f75-4528-bfcc-375f0b8f42bb/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_b169b3a9-0f75-4528-bfcc-375f0b8f42bb/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_b169b3a9-0f75-4528-bfcc-375f0b8f42bb/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_b169b3a9-0f75-4528-bfcc-375f0b8f42bb/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-crafted/NonTermination4.c -s /tmp/vcloud-vcloud-master/worker/run_dir_b169b3a9-0f75-4528-bfcc-375f0b8f42bb/bin/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_b169b3a9-0f75-4528-bfcc-375f0b8f42bb/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 94b61e96441ca10668b436b4ef10dfd9464f0863 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(OVERFLOW) --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-30 01:41:59,835 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-30 01:41:59,838 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-30 01:41:59,890 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-30 01:41:59,915 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-30 01:41:59,917 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-30 01:41:59,919 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-30 01:41:59,922 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-30 01:41:59,924 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-30 01:41:59,926 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-30 01:41:59,928 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-30 01:41:59,929 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-30 01:41:59,930 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-30 01:41:59,931 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-30 01:41:59,933 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-30 01:41:59,934 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-30 01:41:59,935 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-30 01:41:59,941 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-30 01:41:59,943 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-30 01:41:59,947 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-30 01:41:59,955 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-30 01:41:59,958 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-30 01:41:59,960 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-30 01:41:59,962 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-30 01:41:59,969 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-30 01:41:59,969 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-30 01:41:59,970 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-30 01:41:59,972 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-30 01:41:59,973 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-30 01:41:59,974 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-30 01:41:59,975 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-30 01:41:59,976 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-30 01:41:59,979 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-30 01:41:59,980 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-30 01:41:59,982 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-30 01:41:59,982 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-30 01:41:59,983 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-30 01:41:59,984 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-30 01:41:59,984 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-30 01:41:59,985 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-30 01:41:59,986 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-30 01:41:59,989 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_b169b3a9-0f75-4528-bfcc-375f0b8f42bb/bin/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf [2020-11-30 01:42:00,035 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-30 01:42:00,035 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-30 01:42:00,036 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-30 01:42:00,037 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-30 01:42:00,037 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-30 01:42:00,037 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-30 01:42:00,037 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-30 01:42:00,038 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-30 01:42:00,038 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-30 01:42:00,038 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-30 01:42:00,038 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-30 01:42:00,039 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-30 01:42:00,039 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-30 01:42:00,039 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-30 01:42:00,039 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-30 01:42:00,040 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-30 01:42:00,041 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-30 01:42:00,041 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-30 01:42:00,041 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-30 01:42:00,041 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-30 01:42:00,042 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-30 01:42:00,042 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-30 01:42:00,042 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2020-11-30 01:42:00,042 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-30 01:42:00,043 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-30 01:42:00,043 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-30 01:42:00,043 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-30 01:42:00,043 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-30 01:42:00,044 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-30 01:42:00,044 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 01:42:00,044 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-30 01:42:00,045 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-30 01:42:00,045 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-30 01:42:00,045 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-30 01:42:00,045 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-30 01:42:00,046 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-30 01:42:00,046 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-30 01:42:00,046 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-30 01:42:00,046 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_b169b3a9-0f75-4528-bfcc-375f0b8f42bb/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_b169b3a9-0f75-4528-bfcc-375f0b8f42bb/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 94b61e96441ca10668b436b4ef10dfd9464f0863 [2020-11-30 01:42:00,303 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-30 01:42:00,331 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-30 01:42:00,336 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-30 01:42:00,337 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-30 01:42:00,338 INFO L275 PluginConnector]: CDTParser initialized [2020-11-30 01:42:00,339 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_b169b3a9-0f75-4528-bfcc-375f0b8f42bb/bin/utaipan/../../sv-benchmarks/c/termination-crafted/NonTermination4.c [2020-11-30 01:42:00,413 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_b169b3a9-0f75-4528-bfcc-375f0b8f42bb/bin/utaipan/data/6ddb837e5/933d15a02826452b9daa7c679ea6319a/FLAG7e60dd0a4 [2020-11-30 01:42:01,006 INFO L306 CDTParser]: Found 1 translation units. [2020-11-30 01:42:01,007 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_b169b3a9-0f75-4528-bfcc-375f0b8f42bb/sv-benchmarks/c/termination-crafted/NonTermination4.c [2020-11-30 01:42:01,017 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_b169b3a9-0f75-4528-bfcc-375f0b8f42bb/bin/utaipan/data/6ddb837e5/933d15a02826452b9daa7c679ea6319a/FLAG7e60dd0a4 [2020-11-30 01:42:01,380 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_b169b3a9-0f75-4528-bfcc-375f0b8f42bb/bin/utaipan/data/6ddb837e5/933d15a02826452b9daa7c679ea6319a [2020-11-30 01:42:01,382 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-30 01:42:01,384 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-30 01:42:01,401 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-30 01:42:01,401 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-30 01:42:01,404 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-30 01:42:01,405 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 01:42:01" (1/1) ... [2020-11-30 01:42:01,406 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23569ab3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:42:01, skipping insertion in model container [2020-11-30 01:42:01,406 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 01:42:01" (1/1) ... [2020-11-30 01:42:01,413 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-30 01:42:01,428 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-30 01:42:01,623 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 01:42:01,647 INFO L203 MainTranslator]: Completed pre-run [2020-11-30 01:42:01,665 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 01:42:01,679 INFO L208 MainTranslator]: Completed translation [2020-11-30 01:42:01,680 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:42:01 WrapperNode [2020-11-30 01:42:01,681 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-30 01:42:01,682 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-30 01:42:01,683 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-30 01:42:01,683 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-30 01:42:01,690 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:42:01" (1/1) ... [2020-11-30 01:42:01,695 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:42:01" (1/1) ... [2020-11-30 01:42:01,713 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-30 01:42:01,715 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-30 01:42:01,715 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-30 01:42:01,716 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-30 01:42:01,723 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:42:01" (1/1) ... [2020-11-30 01:42:01,724 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:42:01" (1/1) ... [2020-11-30 01:42:01,725 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:42:01" (1/1) ... [2020-11-30 01:42:01,726 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:42:01" (1/1) ... [2020-11-30 01:42:01,728 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:42:01" (1/1) ... [2020-11-30 01:42:01,732 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:42:01" (1/1) ... [2020-11-30 01:42:01,733 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:42:01" (1/1) ... [2020-11-30 01:42:01,734 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-30 01:42:01,736 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-30 01:42:01,737 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-30 01:42:01,737 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-30 01:42:01,738 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:42:01" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b169b3a9-0f75-4528-bfcc-375f0b8f42bb/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 [2020-11-30 01:42:01,815 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-30 01:42:01,815 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-30 01:42:02,124 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-30 01:42:02,124 INFO L298 CfgBuilder]: Removed 5 assume(true) statements. [2020-11-30 01:42:02,126 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:42:02 BoogieIcfgContainer [2020-11-30 01:42:02,126 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-30 01:42:02,128 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-30 01:42:02,128 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-30 01:42:02,131 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-30 01:42:02,132 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.11 01:42:01" (1/3) ... [2020-11-30 01:42:02,132 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f1e9a01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 01:42:02, skipping insertion in model container [2020-11-30 01:42:02,133 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:42:01" (2/3) ... [2020-11-30 01:42:02,133 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f1e9a01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 01:42:02, skipping insertion in model container [2020-11-30 01:42:02,133 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:42:02" (3/3) ... [2020-11-30 01:42:02,135 INFO L111 eAbstractionObserver]: Analyzing ICFG NonTermination4.c [2020-11-30 01:42:02,148 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-30 01:42:02,152 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2020-11-30 01:42:02,164 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-11-30 01:42:02,198 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-30 01:42:02,199 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-30 01:42:02,199 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-30 01:42:02,199 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-30 01:42:02,199 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-30 01:42:02,199 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-30 01:42:02,200 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-30 01:42:02,200 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-30 01:42:02,216 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2020-11-30 01:42:02,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-11-30 01:42:02,224 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:42:02,224 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-11-30 01:42:02,225 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-30 01:42:02,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:42:02,232 INFO L82 PathProgramCache]: Analyzing trace with hash 31073, now seen corresponding path program 1 times [2020-11-30 01:42:02,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:42:02,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858312630] [2020-11-30 01:42:02,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:42:02,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:42:02,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:42:02,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858312630] [2020-11-30 01:42:02,369 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:42:02,369 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-11-30 01:42:02,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104886194] [2020-11-30 01:42:02,375 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 01:42:02,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:42:02,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 01:42:02,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 01:42:02,389 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 3 states. [2020-11-30 01:42:02,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:42:02,482 INFO L93 Difference]: Finished difference Result 15 states and 17 transitions. [2020-11-30 01:42:02,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 01:42:02,484 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-11-30 01:42:02,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:42:02,492 INFO L225 Difference]: With dead ends: 15 [2020-11-30 01:42:02,493 INFO L226 Difference]: Without dead ends: 13 [2020-11-30 01:42:02,495 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 [2020-11-30 01:42:02,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-11-30 01:42:02,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2020-11-30 01:42:02,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-11-30 01:42:02,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2020-11-30 01:42:02,533 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 3 [2020-11-30 01:42:02,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:42:02,534 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2020-11-30 01:42:02,534 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 01:42:02,534 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2020-11-30 01:42:02,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-11-30 01:42:02,534 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:42:02,535 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-11-30 01:42:02,535 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-30 01:42:02,535 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-30 01:42:02,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:42:02,536 INFO L82 PathProgramCache]: Analyzing trace with hash 963307, now seen corresponding path program 1 times [2020-11-30 01:42:02,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:42:02,537 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311325047] [2020-11-30 01:42:02,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:42:02,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:42:02,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:42:02,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311325047] [2020-11-30 01:42:02,574 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:42:02,574 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-11-30 01:42:02,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396330196] [2020-11-30 01:42:02,575 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 01:42:02,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:42:02,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 01:42:02,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 01:42:02,577 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 3 states. [2020-11-30 01:42:02,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:42:02,603 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2020-11-30 01:42:02,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 01:42:02,604 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-11-30 01:42:02,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:42:02,604 INFO L225 Difference]: With dead ends: 12 [2020-11-30 01:42:02,604 INFO L226 Difference]: Without dead ends: 11 [2020-11-30 01:42:02,605 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 [2020-11-30 01:42:02,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2020-11-30 01:42:02,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2020-11-30 01:42:02,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-11-30 01:42:02,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2020-11-30 01:42:02,609 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 4 [2020-11-30 01:42:02,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:42:02,609 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2020-11-30 01:42:02,609 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 01:42:02,609 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2020-11-30 01:42:02,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-30 01:42:02,610 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:42:02,610 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-11-30 01:42:02,610 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-30 01:42:02,611 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-30 01:42:02,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:42:02,611 INFO L82 PathProgramCache]: Analyzing trace with hash 29862563, now seen corresponding path program 1 times [2020-11-30 01:42:02,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:42:02,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517012127] [2020-11-30 01:42:02,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:42:02,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:42:02,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:42:02,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517012127] [2020-11-30 01:42:02,642 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:42:02,643 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-11-30 01:42:02,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132447775] [2020-11-30 01:42:02,643 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 01:42:02,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:42:02,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 01:42:02,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 01:42:02,645 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 3 states. [2020-11-30 01:42:02,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:42:02,668 INFO L93 Difference]: Finished difference Result 15 states and 16 transitions. [2020-11-30 01:42:02,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 01:42:02,669 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2020-11-30 01:42:02,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:42:02,670 INFO L225 Difference]: With dead ends: 15 [2020-11-30 01:42:02,670 INFO L226 Difference]: Without dead ends: 14 [2020-11-30 01:42:02,670 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 [2020-11-30 01:42:02,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-11-30 01:42:02,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2020-11-30 01:42:02,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-11-30 01:42:02,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-11-30 01:42:02,674 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 5 [2020-11-30 01:42:02,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:42:02,675 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-11-30 01:42:02,675 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 01:42:02,675 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-11-30 01:42:02,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-30 01:42:02,675 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:42:02,675 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-30 01:42:02,676 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-30 01:42:02,676 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-30 01:42:02,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:42:02,677 INFO L82 PathProgramCache]: Analyzing trace with hash 925739501, now seen corresponding path program 1 times [2020-11-30 01:42:02,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:42:02,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144215962] [2020-11-30 01:42:02,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:42:02,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:42:02,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:42:02,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144215962] [2020-11-30 01:42:02,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:42:02,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-11-30 01:42:02,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713246515] [2020-11-30 01:42:02,698 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 01:42:02,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:42:02,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 01:42:02,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 01:42:02,700 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 3 states. [2020-11-30 01:42:02,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:42:02,733 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2020-11-30 01:42:02,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 01:42:02,734 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-11-30 01:42:02,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:42:02,735 INFO L225 Difference]: With dead ends: 13 [2020-11-30 01:42:02,735 INFO L226 Difference]: Without dead ends: 12 [2020-11-30 01:42:02,735 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 [2020-11-30 01:42:02,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-11-30 01:42:02,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-11-30 01:42:02,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-11-30 01:42:02,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2020-11-30 01:42:02,738 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 6 [2020-11-30 01:42:02,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:42:02,739 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2020-11-30 01:42:02,739 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 01:42:02,739 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2020-11-30 01:42:02,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-30 01:42:02,740 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:42:02,740 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2020-11-30 01:42:02,740 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-30 01:42:02,740 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-30 01:42:02,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:42:02,741 INFO L82 PathProgramCache]: Analyzing trace with hash 577431471, now seen corresponding path program 1 times [2020-11-30 01:42:02,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:42:02,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879424030] [2020-11-30 01:42:02,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:42:02,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:42:02,793 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:42:02,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879424030] [2020-11-30 01:42:02,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482371734] [2020-11-30 01:42:02,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b169b3a9-0f75-4528-bfcc-375f0b8f42bb/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 [2020-11-30 01:42:02,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:42:02,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 17 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-30 01:42:02,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:42:02,882 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:42:02,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 01:42:02,910 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:42:02,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [728579822] [2020-11-30 01:42:02,929 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-11-30 01:42:02,929 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 01:42:02,934 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 01:42:02,939 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 01:42:02,940 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 01:42:03,211 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 01:42:03,492 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 01:42:03,492 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 01:42:03,492 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 4 [2020-11-30 01:42:03,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054390196] [2020-11-30 01:42:03,493 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-30 01:42:03,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:42:03,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-30 01:42:03,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-11-30 01:42:03,494 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 6 states. [2020-11-30 01:42:03,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:42:03,552 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2020-11-30 01:42:03,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-30 01:42:03,552 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2020-11-30 01:42:03,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:42:03,553 INFO L225 Difference]: With dead ends: 28 [2020-11-30 01:42:03,553 INFO L226 Difference]: Without dead ends: 27 [2020-11-30 01:42:03,554 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-11-30 01:42:03,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-11-30 01:42:03,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2020-11-30 01:42:03,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-11-30 01:42:03,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-11-30 01:42:03,560 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 8 [2020-11-30 01:42:03,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:42:03,561 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-11-30 01:42:03,561 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-30 01:42:03,561 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-11-30 01:42:03,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-30 01:42:03,561 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:42:03,562 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1] [2020-11-30 01:42:03,776 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:42:03,776 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-30 01:42:03,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:42:03,777 INFO L82 PathProgramCache]: Analyzing trace with hash 860863857, now seen corresponding path program 1 times [2020-11-30 01:42:03,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:42:03,777 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052064882] [2020-11-30 01:42:03,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:42:03,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:42:03,833 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:42:03,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052064882] [2020-11-30 01:42:03,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21165176] [2020-11-30 01:42:03,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b169b3a9-0f75-4528-bfcc-375f0b8f42bb/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:42:03,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:42:03,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-30 01:42:03,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:42:03,872 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:42:03,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 01:42:03,891 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:42:03,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1239020428] [2020-11-30 01:42:03,894 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-11-30 01:42:03,894 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 01:42:03,894 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 01:42:03,894 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 01:42:03,895 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 01:42:03,997 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 01:42:04,153 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 01:42:04,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 01:42:04,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 4 [2020-11-30 01:42:04,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815098287] [2020-11-30 01:42:04,154 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-30 01:42:04,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:42:04,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-30 01:42:04,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-11-30 01:42:04,155 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 6 states. [2020-11-30 01:42:04,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:42:04,194 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2020-11-30 01:42:04,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-30 01:42:04,194 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-11-30 01:42:04,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:42:04,195 INFO L225 Difference]: With dead ends: 28 [2020-11-30 01:42:04,195 INFO L226 Difference]: Without dead ends: 27 [2020-11-30 01:42:04,196 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-11-30 01:42:04,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-11-30 01:42:04,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-11-30 01:42:04,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-11-30 01:42:04,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-11-30 01:42:04,201 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 10 [2020-11-30 01:42:04,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:42:04,201 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-11-30 01:42:04,201 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-30 01:42:04,201 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-11-30 01:42:04,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-30 01:42:04,202 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:42:04,202 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 1, 1] [2020-11-30 01:42:04,402 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-11-30 01:42:04,403 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-30 01:42:04,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:42:04,403 INFO L82 PathProgramCache]: Analyzing trace with hash 1492388577, now seen corresponding path program 2 times [2020-11-30 01:42:04,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:42:04,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633442238] [2020-11-30 01:42:04,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:42:04,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:42:04,495 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:42:04,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633442238] [2020-11-30 01:42:04,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799236751] [2020-11-30 01:42:04,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b169b3a9-0f75-4528-bfcc-375f0b8f42bb/bin/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2020-11-30 01:42:04,525 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-11-30 01:42:04,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:42:04,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-30 01:42:04,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:42:04,599 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:42:04,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 01:42:04,691 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:42:04,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1560152948] [2020-11-30 01:42:04,693 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-11-30 01:42:04,693 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 01:42:04,694 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 01:42:04,694 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 01:42:04,694 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 01:42:04,783 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 01:42:05,021 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 01:42:05,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 01:42:05,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2020-11-30 01:42:05,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911692655] [2020-11-30 01:42:05,022 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-30 01:42:05,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:42:05,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-30 01:42:05,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-11-30 01:42:05,023 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 12 states. [2020-11-30 01:42:05,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:42:05,122 INFO L93 Difference]: Finished difference Result 61 states and 66 transitions. [2020-11-30 01:42:05,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-30 01:42:05,123 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 23 [2020-11-30 01:42:05,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:42:05,124 INFO L225 Difference]: With dead ends: 61 [2020-11-30 01:42:05,124 INFO L226 Difference]: Without dead ends: 60 [2020-11-30 01:42:05,125 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 53 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-11-30 01:42:05,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-11-30 01:42:05,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 55. [2020-11-30 01:42:05,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-11-30 01:42:05,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 60 transitions. [2020-11-30 01:42:05,133 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 60 transitions. Word has length 23 [2020-11-30 01:42:05,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:42:05,134 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 60 transitions. [2020-11-30 01:42:05,134 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-30 01:42:05,134 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 60 transitions. [2020-11-30 01:42:05,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-11-30 01:42:05,135 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:42:05,135 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 1, 1] [2020-11-30 01:42:05,349 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-11-30 01:42:05,349 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-30 01:42:05,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:42:05,349 INFO L82 PathProgramCache]: Analyzing trace with hash -333652957, now seen corresponding path program 2 times [2020-11-30 01:42:05,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:42:05,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229572210] [2020-11-30 01:42:05,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:42:05,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:42:05,424 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:42:05,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229572210] [2020-11-30 01:42:05,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134506353] [2020-11-30 01:42:05,425 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b169b3a9-0f75-4528-bfcc-375f0b8f42bb/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 [2020-11-30 01:42:05,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-11-30 01:42:05,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:42:05,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-30 01:42:05,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:42:05,508 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:42:05,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 01:42:05,613 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:42:05,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1699141988] [2020-11-30 01:42:05,616 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-11-30 01:42:05,616 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 01:42:05,616 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 01:42:05,616 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 01:42:05,617 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 01:42:05,693 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 01:42:05,888 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 01:42:05,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 01:42:05,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2020-11-30 01:42:05,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781257466] [2020-11-30 01:42:05,889 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-30 01:42:05,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:42:05,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-30 01:42:05,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2020-11-30 01:42:05,891 INFO L87 Difference]: Start difference. First operand 55 states and 60 transitions. Second operand 12 states. [2020-11-30 01:42:06,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:42:06,131 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2020-11-30 01:42:06,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-30 01:42:06,134 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 25 [2020-11-30 01:42:06,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:42:06,135 INFO L225 Difference]: With dead ends: 58 [2020-11-30 01:42:06,135 INFO L226 Difference]: Without dead ends: 57 [2020-11-30 01:42:06,136 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 60 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2020-11-30 01:42:06,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-11-30 01:42:06,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-11-30 01:42:06,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-11-30 01:42:06,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2020-11-30 01:42:06,153 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 25 [2020-11-30 01:42:06,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:42:06,154 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2020-11-30 01:42:06,154 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-30 01:42:06,154 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2020-11-30 01:42:06,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-30 01:42:06,156 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:42:06,157 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 1, 1] [2020-11-30 01:42:06,358 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:42:06,358 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-30 01:42:06,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:42:06,359 INFO L82 PathProgramCache]: Analyzing trace with hash -390144735, now seen corresponding path program 3 times [2020-11-30 01:42:06,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:42:06,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924853917] [2020-11-30 01:42:06,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:42:06,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:42:06,598 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:42:06,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924853917] [2020-11-30 01:42:06,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020134113] [2020-11-30 01:42:06,600 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b169b3a9-0f75-4528-bfcc-375f0b8f42bb/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 [2020-11-30 01:42:06,648 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-30 01:42:06,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:42:06,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-30 01:42:06,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:42:06,853 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:42:06,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 01:42:07,171 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:42:07,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1449243689] [2020-11-30 01:42:07,173 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-11-30 01:42:07,173 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 01:42:07,174 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 01:42:07,174 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 01:42:07,174 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 01:42:07,235 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 01:42:07,499 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 01:42:07,500 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 01:42:07,500 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2020-11-30 01:42:07,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932839535] [2020-11-30 01:42:07,501 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-30 01:42:07,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:42:07,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-30 01:42:07,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=520, Unknown=0, NotChecked=0, Total=812 [2020-11-30 01:42:07,503 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 24 states. [2020-11-30 01:42:07,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:42:07,674 INFO L93 Difference]: Finished difference Result 127 states and 138 transitions. [2020-11-30 01:42:07,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-30 01:42:07,675 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 53 [2020-11-30 01:42:07,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:42:07,676 INFO L225 Difference]: With dead ends: 127 [2020-11-30 01:42:07,677 INFO L226 Difference]: Without dead ends: 126 [2020-11-30 01:42:07,678 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 131 SyntacticMatches, 10 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=292, Invalid=520, Unknown=0, NotChecked=0, Total=812 [2020-11-30 01:42:07,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-11-30 01:42:07,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 115. [2020-11-30 01:42:07,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-11-30 01:42:07,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 126 transitions. [2020-11-30 01:42:07,699 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 126 transitions. Word has length 53 [2020-11-30 01:42:07,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:42:07,700 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 126 transitions. [2020-11-30 01:42:07,700 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-11-30 01:42:07,700 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 126 transitions. [2020-11-30 01:42:07,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-11-30 01:42:07,701 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:42:07,702 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 1, 1] [2020-11-30 01:42:07,902 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:42:07,902 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-30 01:42:07,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:42:07,903 INFO L82 PathProgramCache]: Analyzing trace with hash -1266934173, now seen corresponding path program 3 times [2020-11-30 01:42:07,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:42:07,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942225586] [2020-11-30 01:42:07,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:42:07,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:42:08,095 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:42:08,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942225586] [2020-11-30 01:42:08,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360683591] [2020-11-30 01:42:08,096 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b169b3a9-0f75-4528-bfcc-375f0b8f42bb/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 [2020-11-30 01:42:08,137 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-30 01:42:08,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:42:08,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-30 01:42:08,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:42:08,299 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:42:08,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 01:42:08,577 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:42:08,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1510777223] [2020-11-30 01:42:08,585 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-11-30 01:42:08,587 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 01:42:08,587 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 01:42:08,591 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 01:42:08,591 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 01:42:08,678 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 01:42:08,863 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 01:42:08,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 01:42:08,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2020-11-30 01:42:08,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175429270] [2020-11-30 01:42:08,865 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-30 01:42:08,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:42:08,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-30 01:42:08,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=469, Unknown=0, NotChecked=0, Total=756 [2020-11-30 01:42:08,866 INFO L87 Difference]: Start difference. First operand 115 states and 126 transitions. Second operand 24 states. [2020-11-30 01:42:08,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:42:08,986 INFO L93 Difference]: Finished difference Result 116 states and 126 transitions. [2020-11-30 01:42:08,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-30 01:42:08,986 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 55 [2020-11-30 01:42:08,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:42:08,988 INFO L225 Difference]: With dead ends: 116 [2020-11-30 01:42:08,988 INFO L226 Difference]: Without dead ends: 115 [2020-11-30 01:42:08,989 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 138 SyntacticMatches, 10 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=287, Invalid=469, Unknown=0, NotChecked=0, Total=756 [2020-11-30 01:42:08,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-11-30 01:42:08,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2020-11-30 01:42:08,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-11-30 01:42:08,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 117 transitions. [2020-11-30 01:42:08,999 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 117 transitions. Word has length 55 [2020-11-30 01:42:08,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:42:08,999 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 117 transitions. [2020-11-30 01:42:08,999 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-11-30 01:42:08,999 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 117 transitions. [2020-11-30 01:42:09,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-11-30 01:42:09,007 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:42:09,007 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 19, 19, 1, 1] [2020-11-30 01:42:09,207 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:42:09,208 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-30 01:42:09,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:42:09,208 INFO L82 PathProgramCache]: Analyzing trace with hash 1391435441, now seen corresponding path program 4 times [2020-11-30 01:42:09,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:42:09,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279544456] [2020-11-30 01:42:09,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:42:09,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 01:42:09,240 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 01:42:09,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 01:42:09,265 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 01:42:09,281 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-11-30 01:42:09,285 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-30 01:42:09,286 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2020-11-30 01:42:09,336 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.11 01:42:09 BoogieIcfgContainer [2020-11-30 01:42:09,336 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-30 01:42:09,337 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-30 01:42:09,337 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-30 01:42:09,337 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-30 01:42:09,338 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:42:02" (3/4) ... [2020-11-30 01:42:09,339 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-30 01:42:09,424 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_b169b3a9-0f75-4528-bfcc-375f0b8f42bb/bin/utaipan/witness.graphml [2020-11-30 01:42:09,424 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-30 01:42:09,426 INFO L168 Benchmark]: Toolchain (without parser) took 8040.65 ms. Allocated memory was 96.5 MB in the beginning and 142.6 MB in the end (delta: 46.1 MB). Free memory was 69.0 MB in the beginning and 71.9 MB in the end (delta: -2.9 MB). Peak memory consumption was 43.6 MB. Max. memory is 16.1 GB. [2020-11-30 01:42:09,426 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 96.5 MB. Free memory is still 55.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 01:42:09,427 INFO L168 Benchmark]: CACSL2BoogieTranslator took 280.27 ms. Allocated memory is still 96.5 MB. Free memory was 69.0 MB in the beginning and 74.3 MB in the end (delta: -5.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-30 01:42:09,427 INFO L168 Benchmark]: Boogie Procedure Inliner took 31.31 ms. Allocated memory is still 96.5 MB. Free memory was 74.3 MB in the beginning and 72.9 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 01:42:09,427 INFO L168 Benchmark]: Boogie Preprocessor took 20.01 ms. Allocated memory is still 96.5 MB. Free memory was 72.9 MB in the beginning and 72.3 MB in the end (delta: 669.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 01:42:09,428 INFO L168 Benchmark]: RCFGBuilder took 389.93 ms. Allocated memory is still 96.5 MB. Free memory was 72.0 MB in the beginning and 62.4 MB in the end (delta: 9.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-30 01:42:09,428 INFO L168 Benchmark]: TraceAbstraction took 7208.48 ms. Allocated memory was 96.5 MB in the beginning and 142.6 MB in the end (delta: 46.1 MB). Free memory was 62.1 MB in the beginning and 75.1 MB in the end (delta: -13.0 MB). Peak memory consumption was 34.5 MB. Max. memory is 16.1 GB. [2020-11-30 01:42:09,429 INFO L168 Benchmark]: Witness Printer took 87.49 ms. Allocated memory is still 142.6 MB. Free memory was 75.1 MB in the beginning and 71.9 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-30 01:42:09,431 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 96.5 MB. Free memory is still 55.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 280.27 ms. Allocated memory is still 96.5 MB. Free memory was 69.0 MB in the beginning and 74.3 MB in the end (delta: -5.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 31.31 ms. Allocated memory is still 96.5 MB. Free memory was 74.3 MB in the beginning and 72.9 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 20.01 ms. Allocated memory is still 96.5 MB. Free memory was 72.9 MB in the beginning and 72.3 MB in the end (delta: 669.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 389.93 ms. Allocated memory is still 96.5 MB. Free memory was 72.0 MB in the beginning and 62.4 MB in the end (delta: 9.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 7208.48 ms. Allocated memory was 96.5 MB in the beginning and 142.6 MB in the end (delta: 46.1 MB). Free memory was 62.1 MB in the beginning and 75.1 MB in the end (delta: -13.0 MB). Peak memory consumption was 34.5 MB. Max. memory is 16.1 GB. * Witness Printer took 87.49 ms. Allocated memory is still 142.6 MB. Free memory was 75.1 MB in the beginning and 71.9 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 20]: integer overflow possible integer overflow possible We found a FailurePath: [L15] int x, y; [L16] x = 1 [L17] y = 1 [L18] COND TRUE x >= 0 [L19] EXPR 2*x [L19] x = 2*x [L20] EXPR 3*y [L20] y = 3*y [L18] COND TRUE x >= 0 [L19] EXPR 2*x [L19] x = 2*x [L20] EXPR 3*y [L20] y = 3*y [L18] COND TRUE x >= 0 [L19] EXPR 2*x [L19] x = 2*x [L20] EXPR 3*y [L20] y = 3*y [L18] COND TRUE x >= 0 [L19] EXPR 2*x [L19] x = 2*x [L20] EXPR 3*y [L20] y = 3*y [L18] COND TRUE x >= 0 [L19] EXPR 2*x [L19] x = 2*x [L20] EXPR 3*y [L20] y = 3*y [L18] COND TRUE x >= 0 [L19] EXPR 2*x [L19] x = 2*x [L20] EXPR 3*y [L20] y = 3*y [L18] COND TRUE x >= 0 [L19] EXPR 2*x [L19] x = 2*x [L20] EXPR 3*y [L20] y = 3*y [L18] COND TRUE x >= 0 [L19] EXPR 2*x [L19] x = 2*x [L20] EXPR 3*y [L20] y = 3*y [L18] COND TRUE x >= 0 [L19] EXPR 2*x [L19] x = 2*x [L20] EXPR 3*y [L20] y = 3*y [L18] COND TRUE x >= 0 [L19] EXPR 2*x [L19] x = 2*x [L20] EXPR 3*y [L20] y = 3*y [L18] COND TRUE x >= 0 [L19] EXPR 2*x [L19] x = 2*x [L20] EXPR 3*y [L20] y = 3*y [L18] COND TRUE x >= 0 [L19] EXPR 2*x [L19] x = 2*x [L20] EXPR 3*y [L20] y = 3*y [L18] COND TRUE x >= 0 [L19] EXPR 2*x [L19] x = 2*x [L20] EXPR 3*y [L20] y = 3*y [L18] COND TRUE x >= 0 [L19] EXPR 2*x [L19] x = 2*x [L20] EXPR 3*y [L20] y = 3*y [L18] COND TRUE x >= 0 [L19] EXPR 2*x [L19] x = 2*x [L20] EXPR 3*y [L20] y = 3*y [L18] COND TRUE x >= 0 [L19] EXPR 2*x [L19] x = 2*x [L20] EXPR 3*y [L20] y = 3*y [L18] COND TRUE x >= 0 [L19] EXPR 2*x [L19] x = 2*x [L20] EXPR 3*y [L20] y = 3*y [L18] COND TRUE x >= 0 [L19] EXPR 2*x [L19] x = 2*x [L20] EXPR 3*y [L20] y = 3*y [L18] COND TRUE x >= 0 [L19] EXPR 2*x [L19] x = 2*x [L20] EXPR 3*y [L20] y = 3*y [L18] COND TRUE x >= 0 [L19] EXPR 2*x [L19] x = 2*x [L20] 3*y - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 11 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 7.0s, OverallIterations: 11, TraceHistogramMax: 20, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 55 SDtfs, 156 SDslu, 234 SDs, 0 SdLazy, 233 SolverSat, 55 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 550 GetRequests, 417 SyntacticMatches, 30 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 2.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=115occurred 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: 0.0s AutomataMinimizationTime, 10 MinimizatonAttempts, 20 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.1s InterpolantComputationTime, 466 NumberOfCodeBlocks, 466 NumberOfCodeBlocksAsserted, 27 NumberOfCheckSat, 518 ConstructedInterpolants, 0 QuantifiedInterpolants, 75072 SizeOfPredicates, 0 NumberOfNonLiveVariables, 330 ConjunctsInSsa, 42 ConjunctsInUnsatCore, 22 InterpolantComputations, 4 PerfectInterpolantSequences, 0/1800 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...